TY  - CONF
AU  - Lazić, Vukić
AU  - Nikolić, R.
AU  - Arsić, D.
AU  - Arsić, M.
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Hadzima, B.
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3631
AB  - The problem considered in this paper is the welding technology of the steel assembly of a firefighter truck rear bridge semi-housing. Since in this procedure the welding is done of the two dissimilar steels, it is necessary to analyze effects of welding on mechanical properties and microstructure of individual joint's zones. The weldability of the base metal was considered first (semi-housing tube and flange), then the welding method and the filler metal were selected and, finally, the technological parameters of welding were calculated. The computational and experimental methods were used for the base metal weldability estimate, based on the hardness measurements in the joint's critical zones and analysis of their structures. Experimental investigations performed were aimed for verification and/or eventual correction of the proposed welding technology.
PB  - Elsevier B.V.
C3  - Transportation Research Procedia
T1  - Analysis of welding of the rear bridge semi-housing assembly of a firefighter truck by the semi-automatic procedure in gas protection
EP  - 552
SP  - 544
VL  - 55
DO  - 10.1016/j.trpro.2021.07.020
ER  - 

@conference{
author = "Lazić, Vukić and Nikolić, R. and Arsić, D. and Arsić, M. and Popović, Olivera and Prokić-Cvetković, Radica and Hadzima, B.",
year = "2021",
abstract = "The problem considered in this paper is the welding technology of the steel assembly of a firefighter truck rear bridge semi-housing. Since in this procedure the welding is done of the two dissimilar steels, it is necessary to analyze effects of welding on mechanical properties and microstructure of individual joint's zones. The weldability of the base metal was considered first (semi-housing tube and flange), then the welding method and the filler metal were selected and, finally, the technological parameters of welding were calculated. The computational and experimental methods were used for the base metal weldability estimate, based on the hardness measurements in the joint's critical zones and analysis of their structures. Experimental investigations performed were aimed for verification and/or eventual correction of the proposed welding technology.",
publisher = "Elsevier B.V.",
journal = "Transportation Research Procedia",
title = "Analysis of welding of the rear bridge semi-housing assembly of a firefighter truck by the semi-automatic procedure in gas protection",
pages = "552-544",
volume = "55",
doi = "10.1016/j.trpro.2021.07.020"
}

Lazić, V., Nikolić, R., Arsić, D., Arsić, M., Popović, O., Prokić-Cvetković, R.,& Hadzima, B.. (2021). Analysis of welding of the rear bridge semi-housing assembly of a firefighter truck by the semi-automatic procedure in gas protection. in Transportation Research Procedia
Elsevier B.V.., 55, 544-552.
https://doi.org/10.1016/j.trpro.2021.07.020

Lazić V, Nikolić R, Arsić D, Arsić M, Popović O, Prokić-Cvetković R, Hadzima B. Analysis of welding of the rear bridge semi-housing assembly of a firefighter truck by the semi-automatic procedure in gas protection. in Transportation Research Procedia. 2021;55:544-552.
doi:10.1016/j.trpro.2021.07.020 .

Lazić, Vukić, Nikolić, R., Arsić, D., Arsić, M., Popović, Olivera, Prokić-Cvetković, Radica, Hadzima, B., "Analysis of welding of the rear bridge semi-housing assembly of a firefighter truck by the semi-automatic procedure in gas protection" in Transportation Research Procedia, 55 (2021):544-552,
https://doi.org/10.1016/j.trpro.2021.07.020 . .

TY  - JOUR
AU  - Arsić, Dušan
AU  - Lazić, Vukić
AU  - Sedmak, Aleksandar
AU  - Aleksandrović, Srbislav
AU  - Zivković, Jelena
AU  - Đorđević, Milan
AU  - Mladenović, Goran
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3390
AB  - This paper presents an experimental and numerical study into the influence of elevated temperatures on mechanical properties of the heat treated high quality hot work tool steel H11. This steel belongs to a group of alloyed steels with extraordinary mechanical properties. The aim of this study was to determine the highest temperature at which these properties are still maintained. The experimental investigation focused on the tensile testing of specimens at seven different temperatures, including the room temperature. The highest testing temperature was 700 degrees C. The heat treatment of plates (specimens) consisted of quenching and tempering. Although the strain hardening of this type of materials is small, the strain hardening curves were calculated to show if there was a possibility for the material to increase its strength due to exploitation loads. Also, a numerical analysis of the tensile test by using the finite element method was done in order to define an appropriate model for numerical testing. The obtained results are then compared with the experimental results.
PB  - Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb
T2  - Transactions of Famena
T1  - Effect of elevated temperatures on mechanical properties of ultra high strength hot work tool steel h11
EP  - 82
IS  - 2
SP  - 71
VL  - 44
DO  - 10.21278/TOF.44207
ER  - 

@article{
author = "Arsić, Dušan and Lazić, Vukić and Sedmak, Aleksandar and Aleksandrović, Srbislav and Zivković, Jelena and Đorđević, Milan and Mladenović, Goran",
year = "2020",
abstract = "This paper presents an experimental and numerical study into the influence of elevated temperatures on mechanical properties of the heat treated high quality hot work tool steel H11. This steel belongs to a group of alloyed steels with extraordinary mechanical properties. The aim of this study was to determine the highest temperature at which these properties are still maintained. The experimental investigation focused on the tensile testing of specimens at seven different temperatures, including the room temperature. The highest testing temperature was 700 degrees C. The heat treatment of plates (specimens) consisted of quenching and tempering. Although the strain hardening of this type of materials is small, the strain hardening curves were calculated to show if there was a possibility for the material to increase its strength due to exploitation loads. Also, a numerical analysis of the tensile test by using the finite element method was done in order to define an appropriate model for numerical testing. The obtained results are then compared with the experimental results.",
publisher = "Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb",
journal = "Transactions of Famena",
title = "Effect of elevated temperatures on mechanical properties of ultra high strength hot work tool steel h11",
pages = "82-71",
number = "2",
volume = "44",
doi = "10.21278/TOF.44207"
}

Arsić, D., Lazić, V., Sedmak, A., Aleksandrović, S., Zivković, J., Đorđević, M.,& Mladenović, G.. (2020). Effect of elevated temperatures on mechanical properties of ultra high strength hot work tool steel h11. in Transactions of Famena
Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb., 44(2), 71-82.
https://doi.org/10.21278/TOF.44207

Arsić D, Lazić V, Sedmak A, Aleksandrović S, Zivković J, Đorđević M, Mladenović G. Effect of elevated temperatures on mechanical properties of ultra high strength hot work tool steel h11. in Transactions of Famena. 2020;44(2):71-82.
doi:10.21278/TOF.44207 .

Arsić, Dušan, Lazić, Vukić, Sedmak, Aleksandar, Aleksandrović, Srbislav, Zivković, Jelena, Đorđević, Milan, Mladenović, Goran, "Effect of elevated temperatures on mechanical properties of ultra high strength hot work tool steel h11" in Transactions of Famena, 44, no. 2 (2020):71-82,
https://doi.org/10.21278/TOF.44207 . .

TY  - JOUR
AU  - Pavkov, Vladimir
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Petrović, Aleksandar
AU  - Mitrović, Nenad
AU  - Mišković, Žarko
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3286
AB  - One of the important tasks of evaluating the integrity of mechanical process elements and structures is to determine the local mechanical properties. In this paper, experimental and numerical analyses of the mechanical behavior of an output inter-heater tube, made of 12H1MF heat-resistant steel, was performed after 200,000 h of exploitation. During exploitation, the tube was exposed to various mechanisms of damage including gas corrosion. The tube was cut from a pipe system during reparations of a thermal power plant, and then cold-deformed by bending to obtain a U-bend tube, which was then used in the experiment. For this purpose, a specimen holder made of structural steel S235 was specifically designed to test such a sample. The U-bend tube was then exposed to the external compressive load during the experiment. Experimental research was based on the application of the 3D digital image correlation (DIC), while a finite element method (FEM) was applied in numerical simulation performed by using the Abaqus software package. The 3D DIC is an optical and contactless experimental method that allows measurements of displacement fields and deformations of geometrically complex structures. The Aramis system was used for the experimental analysis as well as for verification of the numerical model. During the experiment, the von Mises strain field was measured at the top of the U-bend tube, in the tightening zone, as it represents a critical place for crack initiation and propagation during the work of an inter-heater. Based on the obtained results and a comparative analysis of experimental and numerical values of the von Mises strain field at the U-bend tube, deviation of the model predictions of about 18 % was determined. The FEM predicted smaller values of the von Mises strain field compared to the DIC method. This is the result of an incomplete geometry applied in the model due to deformation that occurred in the bend zone of the U-bend tube, loss of material and the tube surface damage due to the influence of gas corrosion during 200,000 h of exploitation. Experimental analysis has confirmed that the U-bend tube, after 200,000 h of exploitation, can remain in service even if it is damaged due to the effect of gas corrosion.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Experimental and numerical analyses of an U-bend tube made of an output inter-heater tube after exploitation
EP  - 63
IS  - 1
SP  - 51
VL  - 74
DO  - 10.2298/HEMIND190905005P
ER  - 

@article{
author = "Pavkov, Vladimir and Bakić, Gordana and Maksimović, Vesna and Petrović, Aleksandar and Mitrović, Nenad and Mišković, Žarko",
year = "2020",
abstract = "One of the important tasks of evaluating the integrity of mechanical process elements and structures is to determine the local mechanical properties. In this paper, experimental and numerical analyses of the mechanical behavior of an output inter-heater tube, made of 12H1MF heat-resistant steel, was performed after 200,000 h of exploitation. During exploitation, the tube was exposed to various mechanisms of damage including gas corrosion. The tube was cut from a pipe system during reparations of a thermal power plant, and then cold-deformed by bending to obtain a U-bend tube, which was then used in the experiment. For this purpose, a specimen holder made of structural steel S235 was specifically designed to test such a sample. The U-bend tube was then exposed to the external compressive load during the experiment. Experimental research was based on the application of the 3D digital image correlation (DIC), while a finite element method (FEM) was applied in numerical simulation performed by using the Abaqus software package. The 3D DIC is an optical and contactless experimental method that allows measurements of displacement fields and deformations of geometrically complex structures. The Aramis system was used for the experimental analysis as well as for verification of the numerical model. During the experiment, the von Mises strain field was measured at the top of the U-bend tube, in the tightening zone, as it represents a critical place for crack initiation and propagation during the work of an inter-heater. Based on the obtained results and a comparative analysis of experimental and numerical values of the von Mises strain field at the U-bend tube, deviation of the model predictions of about 18 % was determined. The FEM predicted smaller values of the von Mises strain field compared to the DIC method. This is the result of an incomplete geometry applied in the model due to deformation that occurred in the bend zone of the U-bend tube, loss of material and the tube surface damage due to the influence of gas corrosion during 200,000 h of exploitation. Experimental analysis has confirmed that the U-bend tube, after 200,000 h of exploitation, can remain in service even if it is damaged due to the effect of gas corrosion.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Experimental and numerical analyses of an U-bend tube made of an output inter-heater tube after exploitation",
pages = "63-51",
number = "1",
volume = "74",
doi = "10.2298/HEMIND190905005P"
}

Pavkov, V., Bakić, G., Maksimović, V., Petrović, A., Mitrović, N.,& Mišković, Ž.. (2020). Experimental and numerical analyses of an U-bend tube made of an output inter-heater tube after exploitation. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 74(1), 51-63.
https://doi.org/10.2298/HEMIND190905005P

Pavkov V, Bakić G, Maksimović V, Petrović A, Mitrović N, Mišković Ž. Experimental and numerical analyses of an U-bend tube made of an output inter-heater tube after exploitation. in Hemijska Industrija. 2020;74(1):51-63.
doi:10.2298/HEMIND190905005P .

Pavkov, Vladimir, Bakić, Gordana, Maksimović, Vesna, Petrović, Aleksandar, Mitrović, Nenad, Mišković, Žarko, "Experimental and numerical analyses of an U-bend tube made of an output inter-heater tube after exploitation" in Hemijska Industrija, 74, no. 1 (2020):51-63,
https://doi.org/10.2298/HEMIND190905005P . .

TY  - JOUR
AU  - Maslarević, Aleksandar
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Maksimović, Vesna
AU  - Pavkov, Vladimir
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3336
AB  - In this study, two erosion protection MMC coatings with WC particles were deposited by the plasma transferred arc (PTA) welding. One of the coatings with tungsten carbide WC in the NiBSi matrix (WC/NiBSi), and the second coating WC in NiCrBSi matrix (WC/NiCrBSi) was deposited by the flame spray process on the same substrate material S235JR steel. Experiments were performed using a gas blast sand erosion test facility with high-velocity erodent particles impact (approximately 100 m/s) at different particle impact angles (20 degrees-45 degrees), with an objective to study erosion wear characteristics and mass loss of two MMC coatings. Microstructural characterization of MMC coatings was done by scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, whereas X-ray diffraction analysis was used for identification of present phases. The hardness of coatings was determined by Vickers hardness measurements. WC/NiBSi obtained by the PTA process shows superior hardness and erosion properties.
PB  - Springer India, New Delhi
T2  - Transactions of The Indian Institute of Metals
T1  - Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes
EP  - 271
IS  - 1
SP  - 259
VL  - 73
DO  - 10.1007/s12666-019-01831-9
ER  - 

@article{
author = "Maslarević, Aleksandar and Bakić, Gordana and Đukić, Miloš and Rajičić, Bratislav and Maksimović, Vesna and Pavkov, Vladimir",
year = "2020",
abstract = "In this study, two erosion protection MMC coatings with WC particles were deposited by the plasma transferred arc (PTA) welding. One of the coatings with tungsten carbide WC in the NiBSi matrix (WC/NiBSi), and the second coating WC in NiCrBSi matrix (WC/NiCrBSi) was deposited by the flame spray process on the same substrate material S235JR steel. Experiments were performed using a gas blast sand erosion test facility with high-velocity erodent particles impact (approximately 100 m/s) at different particle impact angles (20 degrees-45 degrees), with an objective to study erosion wear characteristics and mass loss of two MMC coatings. Microstructural characterization of MMC coatings was done by scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, whereas X-ray diffraction analysis was used for identification of present phases. The hardness of coatings was determined by Vickers hardness measurements. WC/NiBSi obtained by the PTA process shows superior hardness and erosion properties.",
publisher = "Springer India, New Delhi",
journal = "Transactions of The Indian Institute of Metals",
title = "Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes",
pages = "271-259",
number = "1",
volume = "73",
doi = "10.1007/s12666-019-01831-9"
}

Maslarević, A., Bakić, G., Đukić, M., Rajičić, B., Maksimović, V.,& Pavkov, V.. (2020). Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes. in Transactions of The Indian Institute of Metals
Springer India, New Delhi., 73(1), 259-271.
https://doi.org/10.1007/s12666-019-01831-9

Maslarević A, Bakić G, Đukić M, Rajičić B, Maksimović V, Pavkov V. Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes. in Transactions of The Indian Institute of Metals. 2020;73(1):259-271.
doi:10.1007/s12666-019-01831-9 .

Maslarević, Aleksandar, Bakić, Gordana, Đukić, Miloš, Rajičić, Bratislav, Maksimović, Vesna, Pavkov, Vladimir, "Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes" in Transactions of The Indian Institute of Metals, 73, no. 1 (2020):259-271,
https://doi.org/10.1007/s12666-019-01831-9 . .

TY  - JOUR
AU  - Arsić, Dušan M.
AU  - Ivanović, Ivana
AU  - Sedmak, Aleksandar
AU  - Lazić, Mirjana M.
AU  - Kalaba, Dragan V.
AU  - Ceković, Ivana
AU  - Ratković, Nada R.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3278
AB  - In this research the 3-D transient non-linear thermal analysis of the hard-facing process was performed by using the experimental testing and finite element method. Testing was done at three different carbon steels and the obtained results were compared to one obtained by empirical formulas and welding recommendations. Experimental testing was done on hard faced specimens (plates) with different thickness. Temperatures and temperature cycles was measured by using thermocouples in order to determine maximal temperature and cooling time between 800 degrees C and 500 degrees C. After experimental testing the finite element method analysis was done. The simulations were executed on the open source platform Salome using the open source finite element solver Code Aster. The Gaussian double ellipsoid was selected in order to enable greater possibilities for the calculation of the moving heat source. The numerical results were compared with available experimental and mathematical results.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Experimental and numerical study of temperature field during hard-facing of different carbon steels
EP  - 2241
IS  - 3
SP  - 2233
VL  - 24
DO  - 10.2298/TSCI190717338A
ER  - 

@article{
author = "Arsić, Dušan M. and Ivanović, Ivana and Sedmak, Aleksandar and Lazić, Mirjana M. and Kalaba, Dragan V. and Ceković, Ivana and Ratković, Nada R.",
year = "2020",
abstract = "In this research the 3-D transient non-linear thermal analysis of the hard-facing process was performed by using the experimental testing and finite element method. Testing was done at three different carbon steels and the obtained results were compared to one obtained by empirical formulas and welding recommendations. Experimental testing was done on hard faced specimens (plates) with different thickness. Temperatures and temperature cycles was measured by using thermocouples in order to determine maximal temperature and cooling time between 800 degrees C and 500 degrees C. After experimental testing the finite element method analysis was done. The simulations were executed on the open source platform Salome using the open source finite element solver Code Aster. The Gaussian double ellipsoid was selected in order to enable greater possibilities for the calculation of the moving heat source. The numerical results were compared with available experimental and mathematical results.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Experimental and numerical study of temperature field during hard-facing of different carbon steels",
pages = "2241-2233",
number = "3",
volume = "24",
doi = "10.2298/TSCI190717338A"
}

Arsić, D. M., Ivanović, I., Sedmak, A., Lazić, M. M., Kalaba, D. V., Ceković, I.,& Ratković, N. R.. (2020). Experimental and numerical study of temperature field during hard-facing of different carbon steels. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 24(3), 2233-2241.
https://doi.org/10.2298/TSCI190717338A

Arsić DM, Ivanović I, Sedmak A, Lazić MM, Kalaba DV, Ceković I, Ratković NR. Experimental and numerical study of temperature field during hard-facing of different carbon steels. in Thermal Science. 2020;24(3):2233-2241.
doi:10.2298/TSCI190717338A .

Arsić, Dušan M., Ivanović, Ivana, Sedmak, Aleksandar, Lazić, Mirjana M., Kalaba, Dragan V., Ceković, Ivana, Ratković, Nada R., "Experimental and numerical study of temperature field during hard-facing of different carbon steels" in Thermal Science, 24, no. 3 (2020):2233-2241,
https://doi.org/10.2298/TSCI190717338A . .

TY  - JOUR
AU  - Đorđević, Milan
AU  - Aleksandrović, Srbislav
AU  - Djacić, Slavisa
AU  - Sedmak, Aleksandar
AU  - Lazić, Vukić
AU  - Arsić, Dušan
AU  - Mutavdzić, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2999
AB  - Influence of the contact pressure in the deep drawing processes is a very actual research topic in the metal forming technology. Within this research the tribological model of the strip sliding in the flat die was developed. The original experimental computerized apparatus for testing of the strip sliding in the variable contact pressure conditions was developed, as well. The complex, multi-factor experiment was performed by application of the Al thin sheet, with the contact elements of various roughnesses, with different lubricants application and with the variable contact pressure. Besides the description of the developed apparatus, the theoretical way for determination of the pressure dependences was also presented. Based on the theoretical changes of pressure, set in advance, the real influence of the contact pressure was obtained, for each of the given conditions. That makes possible to determine the influence of the tribological factors on the actual pressure. The obtained real contact pressure has verified the reliability of the experimental apparatus, namely the degree of the theoretical pressure dependences deviation from the real ones.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik
T1  - Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model
EP  - 1204
IS  - 5
SP  - 1199
VL  - 26
DO  - 10.17559/TV-20161215205553
ER  - 

@article{
author = "Đorđević, Milan and Aleksandrović, Srbislav and Djacić, Slavisa and Sedmak, Aleksandar and Lazić, Vukić and Arsić, Dušan and Mutavdzić, Milan",
year = "2019",
abstract = "Influence of the contact pressure in the deep drawing processes is a very actual research topic in the metal forming technology. Within this research the tribological model of the strip sliding in the flat die was developed. The original experimental computerized apparatus for testing of the strip sliding in the variable contact pressure conditions was developed, as well. The complex, multi-factor experiment was performed by application of the Al thin sheet, with the contact elements of various roughnesses, with different lubricants application and with the variable contact pressure. Besides the description of the developed apparatus, the theoretical way for determination of the pressure dependences was also presented. Based on the theoretical changes of pressure, set in advance, the real influence of the contact pressure was obtained, for each of the given conditions. That makes possible to determine the influence of the tribological factors on the actual pressure. The obtained real contact pressure has verified the reliability of the experimental apparatus, namely the degree of the theoretical pressure dependences deviation from the real ones.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik",
title = "Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model",
pages = "1204-1199",
number = "5",
volume = "26",
doi = "10.17559/TV-20161215205553"
}

Đorđević, M., Aleksandrović, S., Djacić, S., Sedmak, A., Lazić, V., Arsić, D.,& Mutavdzić, M.. (2019). Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model. in Tehnički vjesnik
Univ Osijek, Tech Fac, Slavonski Brod., 26(5), 1199-1204.
https://doi.org/10.17559/TV-20161215205553

Đorđević M, Aleksandrović S, Djacić S, Sedmak A, Lazić V, Arsić D, Mutavdzić M. Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model. in Tehnički vjesnik. 2019;26(5):1199-1204.
doi:10.17559/TV-20161215205553 .

Đorđević, Milan, Aleksandrović, Srbislav, Djacić, Slavisa, Sedmak, Aleksandar, Lazić, Vukić, Arsić, Dušan, Mutavdzić, Milan, "Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model" in Tehnički vjesnik, 26, no. 5 (2019):1199-1204,
https://doi.org/10.17559/TV-20161215205553 . .

TY  - JOUR
AU  - Arsić, Dušan
AU  - Gnjatović, Nebojša
AU  - Sedmak, Simon
AU  - Arsić, Aleksandra
AU  - Uhricik, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3056
AB  - In this paper are presented results of tests and analyses of complex dynamic loads carried out on the bucket-wheel excavator SchRs 650/5x24 Krupp, as well as assessment of service life of vital welded structures of a bucket-wheel excavator boom subjected to cyclic loading with a variable amplitude through the use of experimental tests carried out in order to determine operational strength and growth of a fatigue crack for one structural part. Bucket-wheel excavator was built by "Thyssen Krupp" company, Germany. Outer loads, or in other words digging forces for the overburden and coal have been calculated on the basis of measured values of actual current intensity of the bucket-wheel drive and recorded output values of changeable loads. Correlations between the power of the bucket-wheel drive system and adequate hourly production, depending on the overall digging resistance which affects the stress condition of the bucket-wheel, were also determined. Results of the theoretical and experimental analysis of natural and forced oscillations of the support structure for various exploitation conditions are presented in first part of the paper. Deformations epsilon(i) determined by tensometric measurements on the rotating shaft of the bucket-wheel were converted into tangential stresses through the introduction of the modulus of elasticity and Poisson's ratio, which, along with the polar moment of inertia of the cross-section, define the moment of rotation on the bucket-wheel shaft. Through the use of the load - strength comparison method (maximization of the ratio of load and strength indicators) the application factor of the gear with the largest number of turns K-A has been determined. In the second part of the paper methodological approach for the assessment of service life of vital welded structures of a bucket-wheel excavator boom was presented. Assessment was done in order to determine operational strength and growth of a fatigue crack, through the use of experimental tests. Realized researches and results presented in this paper offer great possibilities for the analyses of behaviour of vital welded structures of the bucket-wheel boom. By the application of the measurement device with 8 channels for registration and processing of electric signals HBM Spider 8 and measurement tapes HBM 6/350xXY31 deformations were measured at vital welded structures of the boom in the area of the bucket-wheel. The objective of the test is to determine if there is a possibility of occurrence of plastic deformations or initial cracks due to fatigue at vital welded structures and to obtain data which define crack growth.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Integrity assessment and determination of residual fatigue life of vital parts of bucket-wheel excavator operating under dynamic loads
EP  - 195
SP  - 182
VL  - 105
DO  - 10.1016/j.engfailanal.2019.06.072
ER  - 

@article{
author = "Arsić, Dušan and Gnjatović, Nebojša and Sedmak, Simon and Arsić, Aleksandra and Uhricik, Milan",
year = "2019",
abstract = "In this paper are presented results of tests and analyses of complex dynamic loads carried out on the bucket-wheel excavator SchRs 650/5x24 Krupp, as well as assessment of service life of vital welded structures of a bucket-wheel excavator boom subjected to cyclic loading with a variable amplitude through the use of experimental tests carried out in order to determine operational strength and growth of a fatigue crack for one structural part. Bucket-wheel excavator was built by "Thyssen Krupp" company, Germany. Outer loads, or in other words digging forces for the overburden and coal have been calculated on the basis of measured values of actual current intensity of the bucket-wheel drive and recorded output values of changeable loads. Correlations between the power of the bucket-wheel drive system and adequate hourly production, depending on the overall digging resistance which affects the stress condition of the bucket-wheel, were also determined. Results of the theoretical and experimental analysis of natural and forced oscillations of the support structure for various exploitation conditions are presented in first part of the paper. Deformations epsilon(i) determined by tensometric measurements on the rotating shaft of the bucket-wheel were converted into tangential stresses through the introduction of the modulus of elasticity and Poisson's ratio, which, along with the polar moment of inertia of the cross-section, define the moment of rotation on the bucket-wheel shaft. Through the use of the load - strength comparison method (maximization of the ratio of load and strength indicators) the application factor of the gear with the largest number of turns K-A has been determined. In the second part of the paper methodological approach for the assessment of service life of vital welded structures of a bucket-wheel excavator boom was presented. Assessment was done in order to determine operational strength and growth of a fatigue crack, through the use of experimental tests. Realized researches and results presented in this paper offer great possibilities for the analyses of behaviour of vital welded structures of the bucket-wheel boom. By the application of the measurement device with 8 channels for registration and processing of electric signals HBM Spider 8 and measurement tapes HBM 6/350xXY31 deformations were measured at vital welded structures of the boom in the area of the bucket-wheel. The objective of the test is to determine if there is a possibility of occurrence of plastic deformations or initial cracks due to fatigue at vital welded structures and to obtain data which define crack growth.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Integrity assessment and determination of residual fatigue life of vital parts of bucket-wheel excavator operating under dynamic loads",
pages = "195-182",
volume = "105",
doi = "10.1016/j.engfailanal.2019.06.072"
}

Arsić, D., Gnjatović, N., Sedmak, S., Arsić, A.,& Uhricik, M.. (2019). Integrity assessment and determination of residual fatigue life of vital parts of bucket-wheel excavator operating under dynamic loads. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 105, 182-195.
https://doi.org/10.1016/j.engfailanal.2019.06.072

Arsić D, Gnjatović N, Sedmak S, Arsić A, Uhricik M. Integrity assessment and determination of residual fatigue life of vital parts of bucket-wheel excavator operating under dynamic loads. in Engineering Failure Analysis. 2019;105:182-195.
doi:10.1016/j.engfailanal.2019.06.072 .

Arsić, Dušan, Gnjatović, Nebojša, Sedmak, Simon, Arsić, Aleksandra, Uhricik, Milan, "Integrity assessment and determination of residual fatigue life of vital parts of bucket-wheel excavator operating under dynamic loads" in Engineering Failure Analysis, 105 (2019):182-195,
https://doi.org/10.1016/j.engfailanal.2019.06.072 . .

TY  - JOUR
AU  - Jovičić, Radomir
AU  - Pantelić, N.
AU  - Sedmak, S.
AU  - Pavlović, D.
AU  - Štrbački, Živko
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2749
AB  - Smanjenje otvora žljeba može značajno doprineti efikasnosti zavarivanja i produktivnosti teških metalnih konstrukcija Uobičajena je upotreba uglova žljeba od 45° i 60°. Smanjenje ugla otvora žljeba smanjuje potreban broj zavara, čime se smanjuje trajanje zavarivanja, potrošnja materijala za ispunu i zaostali naponi i deformacije. Međutim, smanjivanje ugla žljeba dovodi do određenih poteškoća. Teško je kontrolisati luk u uskom žljebu, što može dovesti do problema sa kvalitetom spoja. U ovom radu je prikazano zavarivanje sučeonih spojeva od čelika debljine 22 mm sa uglom žljeba od 20°. Zavarivanje je izvršeno korišćenjem MAG postupkom zavarivanja, uz softversku kontrolu luka.
AB  - Reduction in groove opening can significantly contribute to welding efficiency and productivity of heavy metal structures. It is common practice to use welded joint groove angles of 45° and 60°. Reduction of the groove opening angle decreases the necessary number of welding passes, thus decreasing the welding duration, filler material consumption and residual stresses and strain. However, groove angle reduction leads to certain difficulties. It is hard to control the arc in a narrow groove, which could lead to welded joint quality issues. In this paper, welding of butt joints made of 22 mm thick steel with the groove angle of 20° is shown. Welding was performed using the MAG procedure, with software controlled ar.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Zavarivanje debelozidnog čelika u uskom žljebu
T1  - Welding of thick-walled steels in a narrow groove
EP  - 129
IS  - 3
SP  - 119
VL  - 63
DO  - 10.5937/zzk1803119J
ER  - 

@article{
author = "Jovičić, Radomir and Pantelić, N. and Sedmak, S. and Pavlović, D. and Štrbački, Živko and Popović, Olivera and Prokić-Cvetković, Radica",
year = "2018",
abstract = "Smanjenje otvora žljeba može značajno doprineti efikasnosti zavarivanja i produktivnosti teških metalnih konstrukcija Uobičajena je upotreba uglova žljeba od 45° i 60°. Smanjenje ugla otvora žljeba smanjuje potreban broj zavara, čime se smanjuje trajanje zavarivanja, potrošnja materijala za ispunu i zaostali naponi i deformacije. Međutim, smanjivanje ugla žljeba dovodi do određenih poteškoća. Teško je kontrolisati luk u uskom žljebu, što može dovesti do problema sa kvalitetom spoja. U ovom radu je prikazano zavarivanje sučeonih spojeva od čelika debljine 22 mm sa uglom žljeba od 20°. Zavarivanje je izvršeno korišćenjem MAG postupkom zavarivanja, uz softversku kontrolu luka., Reduction in groove opening can significantly contribute to welding efficiency and productivity of heavy metal structures. It is common practice to use welded joint groove angles of 45° and 60°. Reduction of the groove opening angle decreases the necessary number of welding passes, thus decreasing the welding duration, filler material consumption and residual stresses and strain. However, groove angle reduction leads to certain difficulties. It is hard to control the arc in a narrow groove, which could lead to welded joint quality issues. In this paper, welding of butt joints made of 22 mm thick steel with the groove angle of 20° is shown. Welding was performed using the MAG procedure, with software controlled ar.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Zavarivanje debelozidnog čelika u uskom žljebu, Welding of thick-walled steels in a narrow groove",
pages = "129-119",
number = "3",
volume = "63",
doi = "10.5937/zzk1803119J"
}

Jovičić, R., Pantelić, N., Sedmak, S., Pavlović, D., Štrbački, Ž., Popović, O.,& Prokić-Cvetković, R.. (2018). Zavarivanje debelozidnog čelika u uskom žljebu. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 63(3), 119-129.
https://doi.org/10.5937/zzk1803119J

Jovičić R, Pantelić N, Sedmak S, Pavlović D, Štrbački Ž, Popović O, Prokić-Cvetković R. Zavarivanje debelozidnog čelika u uskom žljebu. in Zavarivanje i zavarene konstrukcije. 2018;63(3):119-129.
doi:10.5937/zzk1803119J .

Jovičić, Radomir, Pantelić, N., Sedmak, S., Pavlović, D., Štrbački, Živko, Popović, Olivera, Prokić-Cvetković, Radica, "Zavarivanje debelozidnog čelika u uskom žljebu" in Zavarivanje i zavarene konstrukcije, 63, no. 3 (2018):119-129,
https://doi.org/10.5937/zzk1803119J . .

TY  - JOUR
AU  - Jovičić, Radomir
AU  - Sedmak, Simon
AU  - Ilić, Nada
AU  - Radović, Ljubica
AU  - Štrbački, Svetlana
AU  - Antić, Milica
AU  - Burzić, Zijah
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2748
AB  - Polazne strukture i vreme hlađenja u temperaturnom intervalu 800 - 500°C (t8/5) imaju presudan uticaj na strukture i osobine zone uticaja toplote zavarenih spojeva čelika. Na vreme hlađenja t8/5 između ostalog, utiče i temperatura ivice žleba. Zbog zagrevanja toplotom luka temperatura ivice žleba duž spoja raste, zbog čega se vreme hlađenja zone uticaja toplote produžava. Samim tim, duž spoja se produžava i vreme hlađenja t8/5. U radu su prikazani rezultati merenja temperatura ivica žleba pri zavarivanju višeprolaznog sučeonog spoja mikrolegiranog čelika P 460 NL1. Određen je uticaj ovih temperatura na vremena hlađenja t8/5 i na makro i mikrostrukture i tvrdoće u zoni uticaja toplote ovog zavarenog spoja.
AB  - The starting structures and cooling times in the temperature range 800 - 500°C (t8/5) have a decisive influence on the structures and properties of the heat affected zone of steel welded joints. At the cooling time t8/5, inter alia, the groove edge temperature has an effect. Due to heating by the electrical arc, the groove edge temperature along the joint, increases, resulting in extending of the cooling time of the heat affected zone. Therefore, the cooling time t 8/5 is extended along the joint. The paper presents the measurement results of the groove edges temperature during the welding of the multilayer joint of the microalloyed steel P 460 NL1. The influence of these temperatures on the cooling time t8/5 and on the macro and microstructure and hardness in the heat affected zone of this welded joint was determined.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Uticaj temperature ivice žljeba i unete toplote na strukturu i tvrdoću zone uticaja toplote zavarenog spoja čelika P 460 NL1
T1  - The impact of groove edge temperature and heat input on the structure and hardness of the heat affected zone of steel 460 NL1 welded joint
EP  - 113
IS  - 3
SP  - 101
VL  - 63
DO  - 10.5937/zzk1803101J
ER  - 

@article{
author = "Jovičić, Radomir and Sedmak, Simon and Ilić, Nada and Radović, Ljubica and Štrbački, Svetlana and Antić, Milica and Burzić, Zijah",
year = "2018",
abstract = "Polazne strukture i vreme hlađenja u temperaturnom intervalu 800 - 500°C (t8/5) imaju presudan uticaj na strukture i osobine zone uticaja toplote zavarenih spojeva čelika. Na vreme hlađenja t8/5 između ostalog, utiče i temperatura ivice žleba. Zbog zagrevanja toplotom luka temperatura ivice žleba duž spoja raste, zbog čega se vreme hlađenja zone uticaja toplote produžava. Samim tim, duž spoja se produžava i vreme hlađenja t8/5. U radu su prikazani rezultati merenja temperatura ivica žleba pri zavarivanju višeprolaznog sučeonog spoja mikrolegiranog čelika P 460 NL1. Određen je uticaj ovih temperatura na vremena hlađenja t8/5 i na makro i mikrostrukture i tvrdoće u zoni uticaja toplote ovog zavarenog spoja., The starting structures and cooling times in the temperature range 800 - 500°C (t8/5) have a decisive influence on the structures and properties of the heat affected zone of steel welded joints. At the cooling time t8/5, inter alia, the groove edge temperature has an effect. Due to heating by the electrical arc, the groove edge temperature along the joint, increases, resulting in extending of the cooling time of the heat affected zone. Therefore, the cooling time t 8/5 is extended along the joint. The paper presents the measurement results of the groove edges temperature during the welding of the multilayer joint of the microalloyed steel P 460 NL1. The influence of these temperatures on the cooling time t8/5 and on the macro and microstructure and hardness in the heat affected zone of this welded joint was determined.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Uticaj temperature ivice žljeba i unete toplote na strukturu i tvrdoću zone uticaja toplote zavarenog spoja čelika P 460 NL1, The impact of groove edge temperature and heat input on the structure and hardness of the heat affected zone of steel 460 NL1 welded joint",
pages = "113-101",
number = "3",
volume = "63",
doi = "10.5937/zzk1803101J"
}

Jovičić, R., Sedmak, S., Ilić, N., Radović, L., Štrbački, S., Antić, M.,& Burzić, Z.. (2018). Uticaj temperature ivice žljeba i unete toplote na strukturu i tvrdoću zone uticaja toplote zavarenog spoja čelika P 460 NL1. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 63(3), 101-113.
https://doi.org/10.5937/zzk1803101J

Jovičić R, Sedmak S, Ilić N, Radović L, Štrbački S, Antić M, Burzić Z. Uticaj temperature ivice žljeba i unete toplote na strukturu i tvrdoću zone uticaja toplote zavarenog spoja čelika P 460 NL1. in Zavarivanje i zavarene konstrukcije. 2018;63(3):101-113.
doi:10.5937/zzk1803101J .

Jovičić, Radomir, Sedmak, Simon, Ilić, Nada, Radović, Ljubica, Štrbački, Svetlana, Antić, Milica, Burzić, Zijah, "Uticaj temperature ivice žljeba i unete toplote na strukturu i tvrdoću zone uticaja toplote zavarenog spoja čelika P 460 NL1" in Zavarivanje i zavarene konstrukcije, 63, no. 3 (2018):101-113,
https://doi.org/10.5937/zzk1803101J . .

TY  - CONF
AU  - Prokić-Cvetković, Radica
AU  - Popović, Olivera
AU  - Jovičić, Radomir
AU  - Milošević, Nenad
AU  - Burzić, Zijah
AU  - Cvetković, Ivana
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2884
AB  - In this paper is presented behavior of microalloyed steel weld metal with niobium during impact testing, as well as microstructural characterization. Impact tests were done on instrumented Charpy pendulum at room temperature, at -40 degrees C and -55 degrees C. At room temperature, crack propagation energy is much higher than crack initiation energy, while at -40 degrees C and -55 degrees C crack growth energy is lower than crack initiation energy. Fractographic investigation of the fracture surfaces has shown that at room temperature ductile trans-granular fracture is dominant, with a small amount of brittle trans-granular fracture. At lower temperature, the share of brittle fracture is increased, and inter-granular brittle fracture becomes dominant
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
T1  - Microstructural and fracture analysis of microalloyed steel weld metal
EP  - 2226
SP  - 2221
VL  - 13
DO  - 10.1016/j.prostr.2018.12.137
ER  - 

@conference{
author = "Prokić-Cvetković, Radica and Popović, Olivera and Jovičić, Radomir and Milošević, Nenad and Burzić, Zijah and Cvetković, Ivana",
year = "2018",
abstract = "In this paper is presented behavior of microalloyed steel weld metal with niobium during impact testing, as well as microstructural characterization. Impact tests were done on instrumented Charpy pendulum at room temperature, at -40 degrees C and -55 degrees C. At room temperature, crack propagation energy is much higher than crack initiation energy, while at -40 degrees C and -55 degrees C crack growth energy is lower than crack initiation energy. Fractographic investigation of the fracture surfaces has shown that at room temperature ductile trans-granular fracture is dominant, with a small amount of brittle trans-granular fracture. At lower temperature, the share of brittle fracture is increased, and inter-granular brittle fracture becomes dominant",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity",
title = "Microstructural and fracture analysis of microalloyed steel weld metal",
pages = "2226-2221",
volume = "13",
doi = "10.1016/j.prostr.2018.12.137"
}

Prokić-Cvetković, R., Popović, O., Jovičić, R., Milošević, N., Burzić, Z.,& Cvetković, I.. (2018). Microstructural and fracture analysis of microalloyed steel weld metal. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
Elsevier Science Bv, Amsterdam., 13, 2221-2226.
https://doi.org/10.1016/j.prostr.2018.12.137

Prokić-Cvetković R, Popović O, Jovičić R, Milošević N, Burzić Z, Cvetković I. Microstructural and fracture analysis of microalloyed steel weld metal. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:2221-2226.
doi:10.1016/j.prostr.2018.12.137 .

Prokić-Cvetković, Radica, Popović, Olivera, Jovičić, Radomir, Milošević, Nenad, Burzić, Zijah, Cvetković, Ivana, "Microstructural and fracture analysis of microalloyed steel weld metal" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):2221-2226,
https://doi.org/10.1016/j.prostr.2018.12.137 . .

TY  - CONF
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Milošević, Nenad
AU  - Jovičić, Radomir
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4270
AB  - Stabilnost procesa zavarivanja ima značajan uticaj na postizanje propisanog
nivoa kvaliteta zavarenog spoja. Povećanje stabilnosti utiče na smanjenje
mogućnosti pojave nesavršenosti, odnosno grešaka u samom spoju. Stabilnost procesa zavarivanja se ogleda u stabilnosti električnog luka. Promene
dužine luka tokom zavarivanja utiču na varijaciju parametara zavarivanja,
tačnije na jačinu struje i napon. Na osnovu praćenja parametara zavarivanja
u realnom vremenu može se izvršiti statistička analiza dobijenih rezultata.
U radu je prikazan uticaj brzine dovođenja žice i vrste zaštitne atmosfere na
stabilnost MIG/MAG postupka zavarivanja pri upotrebi metalne punjene
elektrodne žice.
C3  - Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications
T1  - Uticaj zaštitne atmosfere i brzine dovođenja žice na stabilnost mig/mag postupka zavarivanja
EP  - 201
SP  - 197
DO  - 10.15308/Sinteza-2018-197-201
ER  - 

@conference{
author = "Popović, Olivera and Prokić-Cvetković, Radica and Milošević, Nenad and Jovičić, Radomir",
year = "2018",
abstract = "Stabilnost procesa zavarivanja ima značajan uticaj na postizanje propisanog
nivoa kvaliteta zavarenog spoja. Povećanje stabilnosti utiče na smanjenje
mogućnosti pojave nesavršenosti, odnosno grešaka u samom spoju. Stabilnost procesa zavarivanja se ogleda u stabilnosti električnog luka. Promene
dužine luka tokom zavarivanja utiču na varijaciju parametara zavarivanja,
tačnije na jačinu struje i napon. Na osnovu praćenja parametara zavarivanja
u realnom vremenu može se izvršiti statistička analiza dobijenih rezultata.
U radu je prikazan uticaj brzine dovođenja žice i vrste zaštitne atmosfere na
stabilnost MIG/MAG postupka zavarivanja pri upotrebi metalne punjene
elektrodne žice.",
journal = "Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications",
title = "Uticaj zaštitne atmosfere i brzine dovođenja žice na stabilnost mig/mag postupka zavarivanja",
pages = "201-197",
doi = "10.15308/Sinteza-2018-197-201"
}

Popović, O., Prokić-Cvetković, R., Milošević, N.,& Jovičić, R.. (2018). Uticaj zaštitne atmosfere i brzine dovođenja žice na stabilnost mig/mag postupka zavarivanja. in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications, 197-201.
https://doi.org/10.15308/Sinteza-2018-197-201

Popović O, Prokić-Cvetković R, Milošević N, Jovičić R. Uticaj zaštitne atmosfere i brzine dovođenja žice na stabilnost mig/mag postupka zavarivanja. in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications. 2018;:197-201.
doi:10.15308/Sinteza-2018-197-201 .

Popović, Olivera, Prokić-Cvetković, Radica, Milošević, Nenad, Jovičić, Radomir, "Uticaj zaštitne atmosfere i brzine dovođenja žice na stabilnost mig/mag postupka zavarivanja" in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications (2018):197-201,
https://doi.org/10.15308/Sinteza-2018-197-201 . .

TY  - CONF
AU  - Jovičić, Radomir
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Cvetković, Dragan
AU  - Milošević, Nenad
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4269
AB  - Zavarivanje se široko primenjuje u industriji pri izradi različite opreme,
mostova, kranova, transportnih sredstava i sl. Ono ima odlučujući uticaj na
kvalitet, pouzdanost, vek i cenu izrade navedenih konstrukcija. Međutim,
kvalitet izvedenih zavarenih spojeva je teško ili je često gotovo nemoguće
utvrditi ispitivanjima na samim konstrukcijama. Zbog toga je potrebno
praćenje toka izrade zavarenih konstrukcija od ugovaranja i projektovanja,
preko kvalifikacije i sertifikacije osoblja i opreme, kvalifikacije procedura
zavarivanja i kontrole tokom i nakon završene izrade konstrukcije. Zahtevi za
kvalitet koje treba ispuniti u pojedinim fazama izrade konstrukcija definisani
su u standardima serije EN ISO 3834.
Odstupanja izvedenog kvaliteta zavarenih spojeva od potrebnog najčešće
nastaju u fazi zavarivanja. Do sada nije postojala mogućnost za kontinualno
praćenje, beleženje i skladištenje podataka o parametrima zavarivanja. U radu
je prikazan sistem zasnovan na informacionim tehnologijama, koji omogućava
prikupljanje i beleženje podataka o parametrima zavarivanja, upotrebljenim
materijalima i angažovanim zavarivačima, njihovo poređenje sa zadatim vrednostima i obustavljanje zavarivanja u slučajevima utvrđenih odstupanja. Na
taj način se znatno poboljšava kvalitet i pouzdanost zavarenih konstrukcija.
C3  - Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications
T1  - Upravljanje kvalitetom zavarenih konstrukcija pomoću informacionih tehnologija
EP  - 252
SP  - 248
DO  - 10.15308/Sinteza-2018-248-252
ER  - 

@conference{
author = "Jovičić, Radomir and Popović, Olivera and Prokić-Cvetković, Radica and Cvetković, Dragan and Milošević, Nenad",
year = "2018",
abstract = "Zavarivanje se široko primenjuje u industriji pri izradi različite opreme,
mostova, kranova, transportnih sredstava i sl. Ono ima odlučujući uticaj na
kvalitet, pouzdanost, vek i cenu izrade navedenih konstrukcija. Međutim,
kvalitet izvedenih zavarenih spojeva je teško ili je često gotovo nemoguće
utvrditi ispitivanjima na samim konstrukcijama. Zbog toga je potrebno
praćenje toka izrade zavarenih konstrukcija od ugovaranja i projektovanja,
preko kvalifikacije i sertifikacije osoblja i opreme, kvalifikacije procedura
zavarivanja i kontrole tokom i nakon završene izrade konstrukcije. Zahtevi za
kvalitet koje treba ispuniti u pojedinim fazama izrade konstrukcija definisani
su u standardima serije EN ISO 3834.
Odstupanja izvedenog kvaliteta zavarenih spojeva od potrebnog najčešće
nastaju u fazi zavarivanja. Do sada nije postojala mogućnost za kontinualno
praćenje, beleženje i skladištenje podataka o parametrima zavarivanja. U radu
je prikazan sistem zasnovan na informacionim tehnologijama, koji omogućava
prikupljanje i beleženje podataka o parametrima zavarivanja, upotrebljenim
materijalima i angažovanim zavarivačima, njihovo poređenje sa zadatim vrednostima i obustavljanje zavarivanja u slučajevima utvrđenih odstupanja. Na
taj način se znatno poboljšava kvalitet i pouzdanost zavarenih konstrukcija.",
journal = "Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications",
title = "Upravljanje kvalitetom zavarenih konstrukcija pomoću informacionih tehnologija",
pages = "252-248",
doi = "10.15308/Sinteza-2018-248-252"
}

Jovičić, R., Popović, O., Prokić-Cvetković, R., Cvetković, D.,& Milošević, N.. (2018). Upravljanje kvalitetom zavarenih konstrukcija pomoću informacionih tehnologija. in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications, 248-252.
https://doi.org/10.15308/Sinteza-2018-248-252

Jovičić R, Popović O, Prokić-Cvetković R, Cvetković D, Milošević N. Upravljanje kvalitetom zavarenih konstrukcija pomoću informacionih tehnologija. in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications. 2018;:248-252.
doi:10.15308/Sinteza-2018-248-252 .

Jovičić, Radomir, Popović, Olivera, Prokić-Cvetković, Radica, Cvetković, Dragan, Milošević, Nenad, "Upravljanje kvalitetom zavarenih konstrukcija pomoću informacionih tehnologija" in Sinteza 2018 - International Scientific Conference on Information Technology and Data Related Research :  Engineering and Telecommunications (2018):248-252,
https://doi.org/10.15308/Sinteza-2018-248-252 . .

TY  - CONF
AU  - Jovičić, Radomir
AU  - Sedmak, Simon
AU  - Prokić-Cvetković, Radica
AU  - Popović, Olivera
AU  - Jovičić-Bubalo, Katarina
AU  - Milošević, Nenad
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2823
AB  - Welded joints represent locations where failure is most likely to occur in welded structures. Welded joint failure depends on their vulnerability to crack initiation and growth. These factors are significantly influenced by the welding technology. The effect of welding technology on the frequency of welded joint failure is complex, and has been thoroughly researched in literature. However, there are still numerous factors whose influence is not sufficiently explained. In this paper, the ratio of strength and plasticity of parent materials and weld metals on deformation properties of welded joint zones were analysed, along with the effects of groove edge temperature on cooling time in the heat affected zone and the effect of multiple defects on local stress increase.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
T1  - Effects of welding technology on the occurrence of fracture in welded joints
EP  - 1688
SP  - 1682
VL  - 13
DO  - 10.1016/j.prostr.2018.12.351
ER  - 

@conference{
author = "Jovičić, Radomir and Sedmak, Simon and Prokić-Cvetković, Radica and Popović, Olivera and Jovičić-Bubalo, Katarina and Milošević, Nenad",
year = "2018",
abstract = "Welded joints represent locations where failure is most likely to occur in welded structures. Welded joint failure depends on their vulnerability to crack initiation and growth. These factors are significantly influenced by the welding technology. The effect of welding technology on the frequency of welded joint failure is complex, and has been thoroughly researched in literature. However, there are still numerous factors whose influence is not sufficiently explained. In this paper, the ratio of strength and plasticity of parent materials and weld metals on deformation properties of welded joint zones were analysed, along with the effects of groove edge temperature on cooling time in the heat affected zone and the effect of multiple defects on local stress increase.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity",
title = "Effects of welding technology on the occurrence of fracture in welded joints",
pages = "1688-1682",
volume = "13",
doi = "10.1016/j.prostr.2018.12.351"
}

Jovičić, R., Sedmak, S., Prokić-Cvetković, R., Popović, O., Jovičić-Bubalo, K.,& Milošević, N.. (2018). Effects of welding technology on the occurrence of fracture in welded joints. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
Elsevier Science Bv, Amsterdam., 13, 1682-1688.
https://doi.org/10.1016/j.prostr.2018.12.351

Jovičić R, Sedmak S, Prokić-Cvetković R, Popović O, Jovičić-Bubalo K, Milošević N. Effects of welding technology on the occurrence of fracture in welded joints. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:1682-1688.
doi:10.1016/j.prostr.2018.12.351 .

Jovičić, Radomir, Sedmak, Simon, Prokić-Cvetković, Radica, Popović, Olivera, Jovičić-Bubalo, Katarina, Milošević, Nenad, "Effects of welding technology on the occurrence of fracture in welded joints" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):1682-1688,
https://doi.org/10.1016/j.prostr.2018.12.351 . .

TY  - JOUR
AU  - Ratković, Nada
AU  - Lazić, Vukić
AU  - Arsić, Dušan
AU  - Nikolić, Ružica R.
AU  - Prokić-Cvetković, Radica
AU  - Popović, Olivera
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2840
AB  - Purpose - The purpose of this paper is to point out the possibilities for friction welding of dissimilar steels which are used in various industries. In addition, friction welding is a welding method that is applied for executing the very responsible joints. This research is focused on friction and tribological processes in the friction plane of the two pieces during the welding. Design/methodology/approach - The present study research has been conducted based on the experimental testing of cylindrical specimens and results are analyzed. Findings - The austenite grain size is affected by several factors through the friction process phase and the compacting phase during the welding. The very fine grain is the consequence of the high degree of the plastic deformation of the near-the-contact layers even in the friction phase. The viscous layer, which is formed during the stable friction phase, is the area where the moving of matter occurs according to a very complex mechanism. Originality/value - The paper contains useful results from the area of conventional friction welding of dissimilar steels and it can be very useful to researchers and engineers who deal with similar problems.
PB  - Emerald Group Publishing Ltd, Bingley
T2  - Industrial Lubrication and Tribology
T1  - Microstructure in the joining zone during the friction welding of the two dissimilar steels
EP  - 407
IS  - 2
SP  - 401
VL  - 70
DO  - 10.1108/ILT-08-2017-0234
ER  - 

@article{
author = "Ratković, Nada and Lazić, Vukić and Arsić, Dušan and Nikolić, Ružica R. and Prokić-Cvetković, Radica and Popović, Olivera",
year = "2018",
abstract = "Purpose - The purpose of this paper is to point out the possibilities for friction welding of dissimilar steels which are used in various industries. In addition, friction welding is a welding method that is applied for executing the very responsible joints. This research is focused on friction and tribological processes in the friction plane of the two pieces during the welding. Design/methodology/approach - The present study research has been conducted based on the experimental testing of cylindrical specimens and results are analyzed. Findings - The austenite grain size is affected by several factors through the friction process phase and the compacting phase during the welding. The very fine grain is the consequence of the high degree of the plastic deformation of the near-the-contact layers even in the friction phase. The viscous layer, which is formed during the stable friction phase, is the area where the moving of matter occurs according to a very complex mechanism. Originality/value - The paper contains useful results from the area of conventional friction welding of dissimilar steels and it can be very useful to researchers and engineers who deal with similar problems.",
publisher = "Emerald Group Publishing Ltd, Bingley",
journal = "Industrial Lubrication and Tribology",
title = "Microstructure in the joining zone during the friction welding of the two dissimilar steels",
pages = "407-401",
number = "2",
volume = "70",
doi = "10.1108/ILT-08-2017-0234"
}

Ratković, N., Lazić, V., Arsić, D., Nikolić, R. R., Prokić-Cvetković, R.,& Popović, O.. (2018). Microstructure in the joining zone during the friction welding of the two dissimilar steels. in Industrial Lubrication and Tribology
Emerald Group Publishing Ltd, Bingley., 70(2), 401-407.
https://doi.org/10.1108/ILT-08-2017-0234

Ratković N, Lazić V, Arsić D, Nikolić RR, Prokić-Cvetković R, Popović O. Microstructure in the joining zone during the friction welding of the two dissimilar steels. in Industrial Lubrication and Tribology. 2018;70(2):401-407.
doi:10.1108/ILT-08-2017-0234 .

Ratković, Nada, Lazić, Vukić, Arsić, Dušan, Nikolić, Ružica R., Prokić-Cvetković, Radica, Popović, Olivera, "Microstructure in the joining zone during the friction welding of the two dissimilar steels" in Industrial Lubrication and Tribology, 70, no. 2 (2018):401-407,
https://doi.org/10.1108/ILT-08-2017-0234 . .

TY  - CONF
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Radović, Ljubica
AU  - Burzić, Zijah
AU  - Arsić, D.
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2783
AB  - Surface welding is a way to extend the exploitation life of damaged parts and constructions and the heat input has a major influence on the weldment properties. In this paper is shown the influence of the heat input on the toughness and the fracture mechanism of the surface welded joint. Surface welding of high carbon steel with self shielded wire was conducted with three different heat inputs (6kJ/cm, 10 kJ/cm and 16 kJ/cm). Total impact energy, crack initiation and crack propagation energy were estimated at room temperature, -20 degrees C and -40 degrees C. Fracture analysis of fractured surfaces was also conducted and it has been found that increasing of heat input leads to an increase of share of transgranular brittle fracture, what is in complete accordance with the obtained energy values. Based on all obtained results, the optimum value of heat input for welding procedure applied was defined.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
T1  - The influence of heat input on the toughness and fracture mechanism of surface weld metal
EP  - 2220
SP  - 2216
VL  - 13
DO  - 10.1016/j.prostr.2018.12.138
ER  - 

@conference{
author = "Popović, Olivera and Prokić-Cvetković, Radica and Radović, Ljubica and Burzić, Zijah and Arsić, D.",
year = "2018",
abstract = "Surface welding is a way to extend the exploitation life of damaged parts and constructions and the heat input has a major influence on the weldment properties. In this paper is shown the influence of the heat input on the toughness and the fracture mechanism of the surface welded joint. Surface welding of high carbon steel with self shielded wire was conducted with three different heat inputs (6kJ/cm, 10 kJ/cm and 16 kJ/cm). Total impact energy, crack initiation and crack propagation energy were estimated at room temperature, -20 degrees C and -40 degrees C. Fracture analysis of fractured surfaces was also conducted and it has been found that increasing of heat input leads to an increase of share of transgranular brittle fracture, what is in complete accordance with the obtained energy values. Based on all obtained results, the optimum value of heat input for welding procedure applied was defined.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity",
title = "The influence of heat input on the toughness and fracture mechanism of surface weld metal",
pages = "2220-2216",
volume = "13",
doi = "10.1016/j.prostr.2018.12.138"
}

Popović, O., Prokić-Cvetković, R., Radović, L., Burzić, Z.,& Arsić, D.. (2018). The influence of heat input on the toughness and fracture mechanism of surface weld metal. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
Elsevier Science Bv, Amsterdam., 13, 2216-2220.
https://doi.org/10.1016/j.prostr.2018.12.138

Popović O, Prokić-Cvetković R, Radović L, Burzić Z, Arsić D. The influence of heat input on the toughness and fracture mechanism of surface weld metal. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:2216-2220.
doi:10.1016/j.prostr.2018.12.138 .

Popović, Olivera, Prokić-Cvetković, Radica, Radović, Ljubica, Burzić, Zijah, Arsić, D., "The influence of heat input on the toughness and fracture mechanism of surface weld metal" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):2216-2220,
https://doi.org/10.1016/j.prostr.2018.12.138 . .

TY  - CONF
AU  - Đorđević, Branislav
AU  - Bakić, Gordana
AU  - Jeremić, Lazar
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Sedmak, Simon
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6265
AB  - Cracks and other defects that can occur in pressure vessel have been a significant practical problem for the integrity of such vessels for a very long time, and these defects can initiate and propagate due to various factors, such as the development technology or manufacturing processes, welding activities, exploitation conditions to which the vessel is subjected, or environmental effects. For some of the previously mentioned influences that can affect crack initiation it is impossible to predict whether or not they will cause problems, since they depend on several factors. In this paper, the effect of exploitation conditions and welding of starting pressure vessels on crack initiation and propagation is presented. The starting pressure vessel is a part of 
 he boiler installation within the Obrenovac thermal power-plant, and is used for moisture separation. The crack was located in the welded joint between one of the connecting branches and the starting pressure vessel, which was subjected to relatively variable exploitation
conditions. Effects that could lead to crack initiation and propagation were analysed, along with potential solutions that could help in avoiding these issues. Short theoretical reviews of requirements that must be met by pressure vessels (in terms of standards) are shown, as well as the theoretical observations related to the effect of welding activities and the consequences of defects that could occur.
C3  - International Conference on New Trends in Fatigue and Fracture
T1  - The Effects of Exploitation Conditions and Welding on Crack Initiation and Propagation in a Starting Pressure Vessel
EP  - 170
SP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6265
ER  - 

@conference{
author = "Đorđević, Branislav and Bakić, Gordana and Jeremić, Lazar and Đukić, Miloš and Rajičić, Bratislav and Sedmak, Simon",
year = "2018",
abstract = "Cracks and other defects that can occur in pressure vessel have been a significant practical problem for the integrity of such vessels for a very long time, and these defects can initiate and propagate due to various factors, such as the development technology or manufacturing processes, welding activities, exploitation conditions to which the vessel is subjected, or environmental effects. For some of the previously mentioned influences that can affect crack initiation it is impossible to predict whether or not they will cause problems, since they depend on several factors. In this paper, the effect of exploitation conditions and welding of starting pressure vessels on crack initiation and propagation is presented. The starting pressure vessel is a part of 
 he boiler installation within the Obrenovac thermal power-plant, and is used for moisture separation. The crack was located in the welded joint between one of the connecting branches and the starting pressure vessel, which was subjected to relatively variable exploitation
conditions. Effects that could lead to crack initiation and propagation were analysed, along with potential solutions that could help in avoiding these issues. Short theoretical reviews of requirements that must be met by pressure vessels (in terms of standards) are shown, as well as the theoretical observations related to the effect of welding activities and the consequences of defects that could occur.",
journal = "International Conference on New Trends in Fatigue and Fracture",
title = "The Effects of Exploitation Conditions and Welding on Crack Initiation and Propagation in a Starting Pressure Vessel",
pages = "170-167",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6265"
}

Đorđević, B., Bakić, G., Jeremić, L., Đukić, M., Rajičić, B.,& Sedmak, S.. (2018). The Effects of Exploitation Conditions and Welding on Crack Initiation and Propagation in a Starting Pressure Vessel. in International Conference on New Trends in Fatigue and Fracture, 167-170.
https://hdl.handle.net/21.15107/rcub_machinery_6265

Đorđević B, Bakić G, Jeremić L, Đukić M, Rajičić B, Sedmak S. The Effects of Exploitation Conditions and Welding on Crack Initiation and Propagation in a Starting Pressure Vessel. in International Conference on New Trends in Fatigue and Fracture. 2018;:167-170.
https://hdl.handle.net/21.15107/rcub_machinery_6265 .

Đorđević, Branislav, Bakić, Gordana, Jeremić, Lazar, Đukić, Miloš, Rajičić, Bratislav, Sedmak, Simon, "The Effects of Exploitation Conditions and Welding on Crack Initiation and Propagation in a Starting Pressure Vessel" in International Conference on New Trends in Fatigue and Fracture (2018):167-170,
https://hdl.handle.net/21.15107/rcub_machinery_6265 .

TY  - JOUR
AU  - Ratković, Nada R.
AU  - Arsić, Dušan M.
AU  - Lazić, Vukić
AU  - Nikolić, Ružica R.
AU  - Hadzima, Branislav
AU  - Palcek, Peter
AU  - Sedmak, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2589
AB  - In this paper is presented a theoretical-experimental analysis of the aluminum-copper joining by friction welding. Considering that such Al-Cu bimetal joints are widely applied in industrial practice, experimental analysis in this paper was performed on the concrete elements used in electronics. The fact that the joining is done of the two dissimilar materials points to complexity of the problem, since phenomena that appear in the joint zone extremely influence physical, mechanical and structural properties of the welded/base metals. Besides the theoretical analysis of the basic phases and mechanisms of the friction welding process, the research also included experimental analysis of the geometry changes due to the plastic deformation, the change of microstructure and hardness in the joint zone, as well as of the basic mechanical properties of the Al-Cu joint, such as tensile strength. This paper presents some significant results, which point to the possibility for realization of the reliable joints of the two dissimilar metals.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Influence of Friction Welding Parameters on Properties of the Al-Cu Joint
EP  - 171
IS  - 1
SP  - 165
VL  - 45
DO  - 10.5937/fmet1701165R
ER  - 

@article{
author = "Ratković, Nada R. and Arsić, Dušan M. and Lazić, Vukić and Nikolić, Ružica R. and Hadzima, Branislav and Palcek, Peter and Sedmak, Aleksandar",
year = "2017",
abstract = "In this paper is presented a theoretical-experimental analysis of the aluminum-copper joining by friction welding. Considering that such Al-Cu bimetal joints are widely applied in industrial practice, experimental analysis in this paper was performed on the concrete elements used in electronics. The fact that the joining is done of the two dissimilar materials points to complexity of the problem, since phenomena that appear in the joint zone extremely influence physical, mechanical and structural properties of the welded/base metals. Besides the theoretical analysis of the basic phases and mechanisms of the friction welding process, the research also included experimental analysis of the geometry changes due to the plastic deformation, the change of microstructure and hardness in the joint zone, as well as of the basic mechanical properties of the Al-Cu joint, such as tensile strength. This paper presents some significant results, which point to the possibility for realization of the reliable joints of the two dissimilar metals.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Influence of Friction Welding Parameters on Properties of the Al-Cu Joint",
pages = "171-165",
number = "1",
volume = "45",
doi = "10.5937/fmet1701165R"
}

Ratković, N. R., Arsić, D. M., Lazić, V., Nikolić, R. R., Hadzima, B., Palcek, P.,& Sedmak, A.. (2017). Influence of Friction Welding Parameters on Properties of the Al-Cu Joint. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 45(1), 165-171.
https://doi.org/10.5937/fmet1701165R

Ratković NR, Arsić DM, Lazić V, Nikolić RR, Hadzima B, Palcek P, Sedmak A. Influence of Friction Welding Parameters on Properties of the Al-Cu Joint. in FME Transactions. 2017;45(1):165-171.
doi:10.5937/fmet1701165R .

Ratković, Nada R., Arsić, Dušan M., Lazić, Vukić, Nikolić, Ružica R., Hadzima, Branislav, Palcek, Peter, Sedmak, Aleksandar, "Influence of Friction Welding Parameters on Properties of the Al-Cu Joint" in FME Transactions, 45, no. 1 (2017):165-171,
https://doi.org/10.5937/fmet1701165R . .

TY  - JOUR
AU  - Jovičić, Radomir
AU  - Prokić-Cvetković, Radica
AU  - Popović, Olivera
AU  - Milošević, Nenad
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2264
AB  - Predgrevanjem čelika se smanjuje brzina hlađenja zone uticaja toplote, čime se izbegava pojava struktura sklonih nastanku hladnih prslina. Sa druge strane suviše mala brzina hlađenja, u ovoj zoni, dovodi do porasta metalnog zrna što, takođe, ima za posledicu povećanje skonosti ka nastanku prslina. Za izračunavanje temperatura predgrevanja čelika povišenih i visokih čvrstoća koriste se metode Itto - Bessyo i metoda data u standardu SRPS EN 1011-2. U radu su navedene metode primenjene na izračunavanje temperature predgrevanja mikrolegiranog čelika P460 NL1. Analiza rezultata proračuna po obe metode pokazuje značajne razlike u visini izračunatih temperatura predgrevanja. Zaključeno je da obe metode imaju ograničenja, koja se moraju imati u vidu pri njihovoj primeni u praksi.
AB  - With preheating of steel the cooling speed of a heat affected zone decreases, which prevents appearance of structure prone to cold cracks. On the other hand, too small cooling speed, in this area, results with growth the metal grains which, also, leads as to the higher prone to cracks. Common used method for calculation of preheating temperature for high strength steels ar Itto - Bessyo method, and method by standard SRPS EN 1011-2. This paper presents the methods for calculating the preheating temperature of micro aloyed steel P460 NL1. Analysis of the results obtained from both methods shows significant differences in the amounts calculated preheat temperature. It was concluded that both methods have limitations that must be taken into account in their application in practice.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Metode za izračunavanje temperatura predgrevanja pri zavarivanju čelika povišene i visoke čvrstoće
T1  - Methods for calculating the preheat temperature welding the high strength steels
EP  - 119
IS  - 3
SP  - 113
VL  - 61
DO  - 10.5937/zzk1603113J
ER  - 

@article{
author = "Jovičić, Radomir and Prokić-Cvetković, Radica and Popović, Olivera and Milošević, Nenad",
year = "2016",
abstract = "Predgrevanjem čelika se smanjuje brzina hlađenja zone uticaja toplote, čime se izbegava pojava struktura sklonih nastanku hladnih prslina. Sa druge strane suviše mala brzina hlađenja, u ovoj zoni, dovodi do porasta metalnog zrna što, takođe, ima za posledicu povećanje skonosti ka nastanku prslina. Za izračunavanje temperatura predgrevanja čelika povišenih i visokih čvrstoća koriste se metode Itto - Bessyo i metoda data u standardu SRPS EN 1011-2. U radu su navedene metode primenjene na izračunavanje temperature predgrevanja mikrolegiranog čelika P460 NL1. Analiza rezultata proračuna po obe metode pokazuje značajne razlike u visini izračunatih temperatura predgrevanja. Zaključeno je da obe metode imaju ograničenja, koja se moraju imati u vidu pri njihovoj primeni u praksi., With preheating of steel the cooling speed of a heat affected zone decreases, which prevents appearance of structure prone to cold cracks. On the other hand, too small cooling speed, in this area, results with growth the metal grains which, also, leads as to the higher prone to cracks. Common used method for calculation of preheating temperature for high strength steels ar Itto - Bessyo method, and method by standard SRPS EN 1011-2. This paper presents the methods for calculating the preheating temperature of micro aloyed steel P460 NL1. Analysis of the results obtained from both methods shows significant differences in the amounts calculated preheat temperature. It was concluded that both methods have limitations that must be taken into account in their application in practice.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Metode za izračunavanje temperatura predgrevanja pri zavarivanju čelika povišene i visoke čvrstoće, Methods for calculating the preheat temperature welding the high strength steels",
pages = "119-113",
number = "3",
volume = "61",
doi = "10.5937/zzk1603113J"
}

Jovičić, R., Prokić-Cvetković, R., Popović, O.,& Milošević, N.. (2016). Metode za izračunavanje temperatura predgrevanja pri zavarivanju čelika povišene i visoke čvrstoće. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 61(3), 113-119.
https://doi.org/10.5937/zzk1603113J

Jovičić R, Prokić-Cvetković R, Popović O, Milošević N. Metode za izračunavanje temperatura predgrevanja pri zavarivanju čelika povišene i visoke čvrstoće. in Zavarivanje i zavarene konstrukcije. 2016;61(3):113-119.
doi:10.5937/zzk1603113J .

Jovičić, Radomir, Prokić-Cvetković, Radica, Popović, Olivera, Milošević, Nenad, "Metode za izračunavanje temperatura predgrevanja pri zavarivanju čelika povišene i visoke čvrstoće" in Zavarivanje i zavarene konstrukcije, 61, no. 3 (2016):113-119,
https://doi.org/10.5937/zzk1603113J . .

TY  - CONF
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Milošević, Nenad
AU  - Cvetković, Dragan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4268
AB  - It has been established that the ferrite structure occurring in different morphologic forms dominates in weld metal of microalloyed steel. Acicular ferrite is the most desirable morphology of ferrite, so this paper analyses influence of the composition of gas mixture on the ferrite modification in the weld metal, specially on the morphology of acicular ferrite. At the same time, this morphological form of ferrite is very significant, because it has great influence on the mechanical properties, especially toughness. Five different gas mixtures (Ar, CO2, O2) were used to determine the optimal gas shielded metal arc process. For investigated microalloyed steel, the optimum gas mixture has been established (5% CO2, 0.91% O2, balance Ar), providing maximum impact
energy due to microstructure, consisting predominately of acicular ferrite.
C3  - Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research : Advanced Engineering Systems
T1  - The effects of composition of shielding gas mixture on the microstructure and toughness of microalloyed steel weld metal
EP  - 229
SP  - 226
DO  - 10.15308/Sinteza-2016-226-229
ER  - 

@conference{
author = "Popović, Olivera and Prokić-Cvetković, Radica and Milošević, Nenad and Cvetković, Dragan",
year = "2016",
abstract = "It has been established that the ferrite structure occurring in different morphologic forms dominates in weld metal of microalloyed steel. Acicular ferrite is the most desirable morphology of ferrite, so this paper analyses influence of the composition of gas mixture on the ferrite modification in the weld metal, specially on the morphology of acicular ferrite. At the same time, this morphological form of ferrite is very significant, because it has great influence on the mechanical properties, especially toughness. Five different gas mixtures (Ar, CO2, O2) were used to determine the optimal gas shielded metal arc process. For investigated microalloyed steel, the optimum gas mixture has been established (5% CO2, 0.91% O2, balance Ar), providing maximum impact
energy due to microstructure, consisting predominately of acicular ferrite.",
journal = "Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research : Advanced Engineering Systems",
title = "The effects of composition of shielding gas mixture on the microstructure and toughness of microalloyed steel weld metal",
pages = "229-226",
doi = "10.15308/Sinteza-2016-226-229"
}

Popović, O., Prokić-Cvetković, R., Milošević, N.,& Cvetković, D.. (2016). The effects of composition of shielding gas mixture on the microstructure and toughness of microalloyed steel weld metal. in Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research : Advanced Engineering Systems, 226-229.
https://doi.org/10.15308/Sinteza-2016-226-229

Popović O, Prokić-Cvetković R, Milošević N, Cvetković D. The effects of composition of shielding gas mixture on the microstructure and toughness of microalloyed steel weld metal. in Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research : Advanced Engineering Systems. 2016;:226-229.
doi:10.15308/Sinteza-2016-226-229 .

Popović, Olivera, Prokić-Cvetković, Radica, Milošević, Nenad, Cvetković, Dragan, "The effects of composition of shielding gas mixture on the microstructure and toughness of microalloyed steel weld metal" in Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research : Advanced Engineering Systems (2016):226-229,
https://doi.org/10.15308/Sinteza-2016-226-229 . .

TY  - JOUR
AU  - Arsić, D.
AU  - Đorđević, M.
AU  - Zivković, J.
AU  - Sedmak, Aleksandar
AU  - Aleksandrović, Srbislav
AU  - Lazić, Vukić
AU  - Rakić, D.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2494
AB  - We present the experimental-numerical analysis of the influence of temperature on mechanical properties of structural high-strength steel class S690QL. Since the steel S690QL belongs to a group of steels with good mechanical properties, the aim of this paper is to determine the highest temperatures at which these good characteristics are kept. Experimental tensile testings of the specimens were performed at five different temperatures in the range from 20 to 550A degrees C. Beside experimental testing, strengthening curves were calculated and numerical analysis using finite element method was performed. Both the experimental and numerical results have shown that decrease of mecahanical properties occurs at approximately 450A degrees C.
PB  - Springer, New York
T2  - Strength of Materials
T1  - Experimental-Numerical Study of Tensile Strength of the High-Strength Steel S690QL at Elevated Temperatures
EP  - 695
IS  - 5
SP  - 687
VL  - 48
DO  - 10.1007/s11223-016-9812-x
ER  - 

@article{
author = "Arsić, D. and Đorđević, M. and Zivković, J. and Sedmak, Aleksandar and Aleksandrović, Srbislav and Lazić, Vukić and Rakić, D.",
year = "2016",
abstract = "We present the experimental-numerical analysis of the influence of temperature on mechanical properties of structural high-strength steel class S690QL. Since the steel S690QL belongs to a group of steels with good mechanical properties, the aim of this paper is to determine the highest temperatures at which these good characteristics are kept. Experimental tensile testings of the specimens were performed at five different temperatures in the range from 20 to 550A degrees C. Beside experimental testing, strengthening curves were calculated and numerical analysis using finite element method was performed. Both the experimental and numerical results have shown that decrease of mecahanical properties occurs at approximately 450A degrees C.",
publisher = "Springer, New York",
journal = "Strength of Materials",
title = "Experimental-Numerical Study of Tensile Strength of the High-Strength Steel S690QL at Elevated Temperatures",
pages = "695-687",
number = "5",
volume = "48",
doi = "10.1007/s11223-016-9812-x"
}

Arsić, D., Đorđević, M., Zivković, J., Sedmak, A., Aleksandrović, S., Lazić, V.,& Rakić, D.. (2016). Experimental-Numerical Study of Tensile Strength of the High-Strength Steel S690QL at Elevated Temperatures. in Strength of Materials
Springer, New York., 48(5), 687-695.
https://doi.org/10.1007/s11223-016-9812-x

Arsić D, Đorđević M, Zivković J, Sedmak A, Aleksandrović S, Lazić V, Rakić D. Experimental-Numerical Study of Tensile Strength of the High-Strength Steel S690QL at Elevated Temperatures. in Strength of Materials. 2016;48(5):687-695.
doi:10.1007/s11223-016-9812-x .

Arsić, D., Đorđević, M., Zivković, J., Sedmak, Aleksandar, Aleksandrović, Srbislav, Lazić, Vukić, Rakić, D., "Experimental-Numerical Study of Tensile Strength of the High-Strength Steel S690QL at Elevated Temperatures" in Strength of Materials, 48, no. 5 (2016):687-695,
https://doi.org/10.1007/s11223-016-9812-x . .

TY  - JOUR
AU  - Lazić, Vukić
AU  - Sedmak, Aleksandar
AU  - Samardžić, I.
AU  - Aleksandrović, Srbislav
AU  - Milosavljević, Dragan I.
AU  - Arsić, D.
AU  - Đorđević, M.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2313
AB  - This paper points out complex working conditions of forging dies, which are the most frequent causes of their damage, and proposes suitable hard-facing repair procedures. The shear strength between the hard-faced layer and base metal has been measured using specially developed tool, and correlation between output results and the applied hard-facing technology is established.
PB  - Faculty of Metallurgy
T2  - Metalurgija
T1  - Determination of bond strength between the hard-faced (HF) layer and the base material (BM) of forging dies
EP  - 94
IS  - 1
SP  - 91
VL  - 55
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2313
ER  - 

@article{
author = "Lazić, Vukić and Sedmak, Aleksandar and Samardžić, I. and Aleksandrović, Srbislav and Milosavljević, Dragan I. and Arsić, D. and Đorđević, M.",
year = "2016",
abstract = "This paper points out complex working conditions of forging dies, which are the most frequent causes of their damage, and proposes suitable hard-facing repair procedures. The shear strength between the hard-faced layer and base metal has been measured using specially developed tool, and correlation between output results and the applied hard-facing technology is established.",
publisher = "Faculty of Metallurgy",
journal = "Metalurgija",
title = "Determination of bond strength between the hard-faced (HF) layer and the base material (BM) of forging dies",
pages = "94-91",
number = "1",
volume = "55",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2313"
}

Lazić, V., Sedmak, A., Samardžić, I., Aleksandrović, S., Milosavljević, D. I., Arsić, D.,& Đorđević, M.. (2016). Determination of bond strength between the hard-faced (HF) layer and the base material (BM) of forging dies. in Metalurgija
Faculty of Metallurgy., 55(1), 91-94.
https://hdl.handle.net/21.15107/rcub_machinery_2313

Lazić V, Sedmak A, Samardžić I, Aleksandrović S, Milosavljević DI, Arsić D, Đorđević M. Determination of bond strength between the hard-faced (HF) layer and the base material (BM) of forging dies. in Metalurgija. 2016;55(1):91-94.
https://hdl.handle.net/21.15107/rcub_machinery_2313 .

Lazić, Vukić, Sedmak, Aleksandar, Samardžić, I., Aleksandrović, Srbislav, Milosavljević, Dragan I., Arsić, D., Đorđević, M., "Determination of bond strength between the hard-faced (HF) layer and the base material (BM) of forging dies" in Metalurgija, 55, no. 1 (2016):91-94,
https://hdl.handle.net/21.15107/rcub_machinery_2313 .

TY  - JOUR
AU  - Jovičić, Radomir
AU  - Prokić-Cvetković, Radica
AU  - Zrilić, Branko
AU  - Jovičić-Bubalo, Katarina
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2077
AB  - Jedan od osnovnih parametara koji utiče na osobine spojeva zavarenih elektrolučnim postupcima je količina unite toplote. Obezbeđenje dovoljne pouzdanosti zavarenih konstrukcija pogotovo konstrukcija izrađenih od čelika povišene i visoke čvrstoće i razvoj novih materijala nameću potrebu za preciznijim merenjem parametara na osnovu kojih se izračunava količina unite toplote. U ovom radu je pokazano da je za preciznije izračunavanje količine unite toplote neophodno kontinualno merenje struje i napona tokom zavarivanja. Rezultati merenja su pokazali da jačine struje može značajno da osciluje tokom zavarivanja jednog zavara, da prosečna jačina struje u jednom delu zavara može bitno da se razlikuje od prosečne vrednosti struje u drugom delu istog zavara i da obe mogu da se razlikuju od prosečne vrednosti jačine struje za ceo zavar.
AB  - One of the main parameters that influence the properties of the welded joints made by arc welding processes is heat input. Providing sufficient reliability of welded structures, especially structures made of high strength steelsand development of new materials create a need for more precise measurement parameters on the basis of which to calculate the amount of heat input. In this paper, it is for precisely calculate the amount of heat input necessary to continuously measure the current and voltage during welding. The measured results showed that the current can significantly fluctuate during welding of a weld, that the average current in one part of the weld may vary significantly from the average value of current in the second part of the same weld and that both may be different from the average value for a current for the whole weld.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Unos toplote pri zavarivanju
T1  - Heat input welding
EP  - 69
IS  - 2
SP  - 61
VL  - 60
DO  - 10.5937/zzk1502061J
ER  - 

@article{
author = "Jovičić, Radomir and Prokić-Cvetković, Radica and Zrilić, Branko and Jovičić-Bubalo, Katarina",
year = "2015",
abstract = "Jedan od osnovnih parametara koji utiče na osobine spojeva zavarenih elektrolučnim postupcima je količina unite toplote. Obezbeđenje dovoljne pouzdanosti zavarenih konstrukcija pogotovo konstrukcija izrađenih od čelika povišene i visoke čvrstoće i razvoj novih materijala nameću potrebu za preciznijim merenjem parametara na osnovu kojih se izračunava količina unite toplote. U ovom radu je pokazano da je za preciznije izračunavanje količine unite toplote neophodno kontinualno merenje struje i napona tokom zavarivanja. Rezultati merenja su pokazali da jačine struje može značajno da osciluje tokom zavarivanja jednog zavara, da prosečna jačina struje u jednom delu zavara može bitno da se razlikuje od prosečne vrednosti struje u drugom delu istog zavara i da obe mogu da se razlikuju od prosečne vrednosti jačine struje za ceo zavar., One of the main parameters that influence the properties of the welded joints made by arc welding processes is heat input. Providing sufficient reliability of welded structures, especially structures made of high strength steelsand development of new materials create a need for more precise measurement parameters on the basis of which to calculate the amount of heat input. In this paper, it is for precisely calculate the amount of heat input necessary to continuously measure the current and voltage during welding. The measured results showed that the current can significantly fluctuate during welding of a weld, that the average current in one part of the weld may vary significantly from the average value of current in the second part of the same weld and that both may be different from the average value for a current for the whole weld.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Unos toplote pri zavarivanju, Heat input welding",
pages = "69-61",
number = "2",
volume = "60",
doi = "10.5937/zzk1502061J"
}

Jovičić, R., Prokić-Cvetković, R., Zrilić, B.,& Jovičić-Bubalo, K.. (2015). Unos toplote pri zavarivanju. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 60(2), 61-69.
https://doi.org/10.5937/zzk1502061J

Jovičić R, Prokić-Cvetković R, Zrilić B, Jovičić-Bubalo K. Unos toplote pri zavarivanju. in Zavarivanje i zavarene konstrukcije. 2015;60(2):61-69.
doi:10.5937/zzk1502061J .

Jovičić, Radomir, Prokić-Cvetković, Radica, Zrilić, Branko, Jovičić-Bubalo, Katarina, "Unos toplote pri zavarivanju" in Zavarivanje i zavarene konstrukcije, 60, no. 2 (2015):61-69,
https://doi.org/10.5937/zzk1502061J . .

TY  - JOUR
AU  - Popović, Olivera
AU  - Prokić-Cvetković, Radica
AU  - Lukić, Uroš
AU  - Jovičić, Radomir
AU  - Burzić, Meri
AU  - Beljić, Biljana
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2071
AB  - Punjene i samozaštitne žice su dodatni materijali koji se poslednjih godina sve više koriste zbog povećane produktivnosti i ekonomičnosti, boljeg kvaliteta spoja i lakšeg rada na terenu. S druge strane, jedan od glavnih nedostataka ovih žica je povećana količina dimnih gasova i nedovoljna istraženost njihove štetnosti, naročito u slučaju samozaštitne žice. Zbog toga se pred nove generacije ovih žica postavlja i ekološki zahtev smanjenja emisije dimnih gasova radi zaštite kako zdravlja zavarivača, tako i okoline. U cilju istraživanja ovog uticaja, ploče čelika mikrolegiranog sa V, Nb i Ti su zavarene metalnom punjenom žicom u zaštitnoj atmosferi Ar+5.9%CO2+1.1%O2 i samozaštitnom žicom. Pri tome su izmerene vrednosti emisije gasova CO, CO2 i SO2, kao i ukupne prašine. Dobijene vrednosti su upoređene kako međusobno, tako i sa maksimalnim dozvoljenim koncentracijama prema važećem standardu. Utvrđeno je da samozaštitne žice, suprotno očekivanjima, ne pokazuju veću toksičnost u odnosu na metalne punjene žice.
AB  - The use of flux cored and self-shielded wires as filler materials for gas metal arc welding is growing constantly due to increased productivity and efficiency, better weld quality and easer operation. On the other hand, one of the major drawbacks of these wires is the increased amount of fumes and gases and insufficient data of their harmful effects, especially in the case of self shielded wire. Therefore, in now days, one of the most important requirements is environmentally and health request for decreased fume and gas emission. In this paper, the plates of steel micro alloyed with V, Nb and Ti, were welded with metal cored wire in shielded atmosphere of Ar+5.9%CO2+1.1%O2 and with self-shielded wire. The concentrations of emitted total dust and gases CO, CO2 and SO2 were measured. Obtained values were compared with permissible exposure limits defined by standard. It was estimated that self shielded wire did not show higher toxicity compare to metal cored wire, what is in the contrast with previous studies.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Emisija dimnih gasova pri zavarivanju metalnom punjenom i samozaštitnom žicom
T1  - Gas emission during welding with metal cored and self-shielded wire
EP  - 20
IS  - 1
SP  - 15
VL  - 60
DO  - 10.5937/zzk1501015P
ER  - 

@article{
author = "Popović, Olivera and Prokić-Cvetković, Radica and Lukić, Uroš and Jovičić, Radomir and Burzić, Meri and Beljić, Biljana",
year = "2015",
abstract = "Punjene i samozaštitne žice su dodatni materijali koji se poslednjih godina sve više koriste zbog povećane produktivnosti i ekonomičnosti, boljeg kvaliteta spoja i lakšeg rada na terenu. S druge strane, jedan od glavnih nedostataka ovih žica je povećana količina dimnih gasova i nedovoljna istraženost njihove štetnosti, naročito u slučaju samozaštitne žice. Zbog toga se pred nove generacije ovih žica postavlja i ekološki zahtev smanjenja emisije dimnih gasova radi zaštite kako zdravlja zavarivača, tako i okoline. U cilju istraživanja ovog uticaja, ploče čelika mikrolegiranog sa V, Nb i Ti su zavarene metalnom punjenom žicom u zaštitnoj atmosferi Ar+5.9%CO2+1.1%O2 i samozaštitnom žicom. Pri tome su izmerene vrednosti emisije gasova CO, CO2 i SO2, kao i ukupne prašine. Dobijene vrednosti su upoređene kako međusobno, tako i sa maksimalnim dozvoljenim koncentracijama prema važećem standardu. Utvrđeno je da samozaštitne žice, suprotno očekivanjima, ne pokazuju veću toksičnost u odnosu na metalne punjene žice., The use of flux cored and self-shielded wires as filler materials for gas metal arc welding is growing constantly due to increased productivity and efficiency, better weld quality and easer operation. On the other hand, one of the major drawbacks of these wires is the increased amount of fumes and gases and insufficient data of their harmful effects, especially in the case of self shielded wire. Therefore, in now days, one of the most important requirements is environmentally and health request for decreased fume and gas emission. In this paper, the plates of steel micro alloyed with V, Nb and Ti, were welded with metal cored wire in shielded atmosphere of Ar+5.9%CO2+1.1%O2 and with self-shielded wire. The concentrations of emitted total dust and gases CO, CO2 and SO2 were measured. Obtained values were compared with permissible exposure limits defined by standard. It was estimated that self shielded wire did not show higher toxicity compare to metal cored wire, what is in the contrast with previous studies.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Emisija dimnih gasova pri zavarivanju metalnom punjenom i samozaštitnom žicom, Gas emission during welding with metal cored and self-shielded wire",
pages = "20-15",
number = "1",
volume = "60",
doi = "10.5937/zzk1501015P"
}

Popović, O., Prokić-Cvetković, R., Lukić, U., Jovičić, R., Burzić, M.,& Beljić, B.. (2015). Emisija dimnih gasova pri zavarivanju metalnom punjenom i samozaštitnom žicom. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 60(1), 15-20.
https://doi.org/10.5937/zzk1501015P

Popović O, Prokić-Cvetković R, Lukić U, Jovičić R, Burzić M, Beljić B. Emisija dimnih gasova pri zavarivanju metalnom punjenom i samozaštitnom žicom. in Zavarivanje i zavarene konstrukcije. 2015;60(1):15-20.
doi:10.5937/zzk1501015P .

Popović, Olivera, Prokić-Cvetković, Radica, Lukić, Uroš, Jovičić, Radomir, Burzić, Meri, Beljić, Biljana, "Emisija dimnih gasova pri zavarivanju metalnom punjenom i samozaštitnom žicom" in Zavarivanje i zavarene konstrukcije, 60, no. 1 (2015):15-20,
https://doi.org/10.5937/zzk1501015P . .

TY  - JOUR
AU  - Petronić, Sanja
AU  - Burzić, Meri
AU  - Milovanović, Dubravka
AU  - Čolić, Katarina
AU  - Radovanović, Željko
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2055
AB  - Lasersko zavarivanje je proces zavarivanja sa velikom gustinom energije i mnogobrojnim prednostima u odnosu na konvencionalne metode zavarivanja (uska zona uticaja toplote, manji unos toplote, manja distorzija i sl.) Mehanička obrada laserom je inovativna tehnika kojom se poboljšavaju karakteristike otpornosti na zamor, habanje i otpornost na koroziju. U ovom radu, mehanički su obrađene laserom dve grupe uzoraka; osnovnog materijala i laserski zavarenih spojeva. Limovi superlegure debljine 2mm su zavareni milisekundnim Nd:YAG laserom, dok je mehanička obada obavljena pikosekundnim Nd:YAG laserom. Zavareni spojevi su ispitani zatezanjem, a mikrostruktura je posmatrana optičkim i skenirajućim elektronskim mikroskopom. Mikrotvrdoća je merena po Vikersu sa opterećenjem od 10 N.
AB  - Laser welding is a welding process with a high energy density and numerous advantages over conventional welding methods (narrow heat affected zone, lower heat input, less distortion, and the like.) Mechanical treatment laser is an innovative technique for improving the properties of fatigue resistance, abrasion and corrosion resistance. In this paper, mechanically processed by laser two groups of samples; base materials and laser welded joints. Sheets made of Ni superalloy 2mm thick -millisecond Nd: YAG laser, while the mechanical treatment made picosecond Nd: YAG laser. Welds are tensile tested, and microstructure was observed by optical and scanning electron microscopy. The microhardness was measured by Vickers method with a load of 10 N.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Mehanička obrada pikosekundnim laserom osnovnog materijala i zavarenih spojeva legure Nimonik 263
T1  - Picosecond laser shock peening of base Nimonic 263 material and laser welded Nimonic 263 alloy
EP  - 155
IS  - 4
SP  - 149
VL  - 60
DO  - 10.5937/zzk1504149P
ER  - 

@article{
author = "Petronić, Sanja and Burzić, Meri and Milovanović, Dubravka and Čolić, Katarina and Radovanović, Željko",
year = "2015",
abstract = "Lasersko zavarivanje je proces zavarivanja sa velikom gustinom energije i mnogobrojnim prednostima u odnosu na konvencionalne metode zavarivanja (uska zona uticaja toplote, manji unos toplote, manja distorzija i sl.) Mehanička obrada laserom je inovativna tehnika kojom se poboljšavaju karakteristike otpornosti na zamor, habanje i otpornost na koroziju. U ovom radu, mehanički su obrađene laserom dve grupe uzoraka; osnovnog materijala i laserski zavarenih spojeva. Limovi superlegure debljine 2mm su zavareni milisekundnim Nd:YAG laserom, dok je mehanička obada obavljena pikosekundnim Nd:YAG laserom. Zavareni spojevi su ispitani zatezanjem, a mikrostruktura je posmatrana optičkim i skenirajućim elektronskim mikroskopom. Mikrotvrdoća je merena po Vikersu sa opterećenjem od 10 N., Laser welding is a welding process with a high energy density and numerous advantages over conventional welding methods (narrow heat affected zone, lower heat input, less distortion, and the like.) Mechanical treatment laser is an innovative technique for improving the properties of fatigue resistance, abrasion and corrosion resistance. In this paper, mechanically processed by laser two groups of samples; base materials and laser welded joints. Sheets made of Ni superalloy 2mm thick -millisecond Nd: YAG laser, while the mechanical treatment made picosecond Nd: YAG laser. Welds are tensile tested, and microstructure was observed by optical and scanning electron microscopy. The microhardness was measured by Vickers method with a load of 10 N.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Mehanička obrada pikosekundnim laserom osnovnog materijala i zavarenih spojeva legure Nimonik 263, Picosecond laser shock peening of base Nimonic 263 material and laser welded Nimonic 263 alloy",
pages = "155-149",
number = "4",
volume = "60",
doi = "10.5937/zzk1504149P"
}

Petronić, S., Burzić, M., Milovanović, D., Čolić, K.,& Radovanović, Ž.. (2015). Mehanička obrada pikosekundnim laserom osnovnog materijala i zavarenih spojeva legure Nimonik 263. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 60(4), 149-155.
https://doi.org/10.5937/zzk1504149P

Petronić S, Burzić M, Milovanović D, Čolić K, Radovanović Ž. Mehanička obrada pikosekundnim laserom osnovnog materijala i zavarenih spojeva legure Nimonik 263. in Zavarivanje i zavarene konstrukcije. 2015;60(4):149-155.
doi:10.5937/zzk1504149P .

Petronić, Sanja, Burzić, Meri, Milovanović, Dubravka, Čolić, Katarina, Radovanović, Željko, "Mehanička obrada pikosekundnim laserom osnovnog materijala i zavarenih spojeva legure Nimonik 263" in Zavarivanje i zavarene konstrukcije, 60, no. 4 (2015):149-155,
https://doi.org/10.5937/zzk1504149P . .

TY  - JOUR
AU  - Petronić, Sanja
AU  - Burzić, Meri
AU  - Milovanović, D.
AU  - Čolić, Katarina
AU  - Perković, Srđa
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2115
AB  - Laser surface treatment is both a thermomechanical and mechanical process, based on the ability of a high energy laser pulse to generate shock waves and plastic deformation in metallic materials. Laser welding is a high energy density process with many advantages such as narrow heat affected zone, lower heat input and lower heat/energy distortion compared to conventional welding processes. In this paper, Nimonic 263 alloy sheets are laser welded by Nd:YAG laser using different laser processing parameters. The microstructure, surface roughness and mechanical properties are investigated. Welded joints are mechanically treated by laser in order to improve the surface and mechanical characteristics. Mechanical characteristics are determined by tensile test, and fractures and laser treated weld surfaces are observed by scanning and optical microscopy. Surface topography is analysed by optical profilometry and micro hardness is measured by Vickers method.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Surface modification of laser welded nimonic 263 sheets
EP  - 156
IS  - 3
SP  - 153
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2115
ER  - 

@article{
author = "Petronić, Sanja and Burzić, Meri and Milovanović, D. and Čolić, Katarina and Perković, Srđa",
year = "2015",
abstract = "Laser surface treatment is both a thermomechanical and mechanical process, based on the ability of a high energy laser pulse to generate shock waves and plastic deformation in metallic materials. Laser welding is a high energy density process with many advantages such as narrow heat affected zone, lower heat input and lower heat/energy distortion compared to conventional welding processes. In this paper, Nimonic 263 alloy sheets are laser welded by Nd:YAG laser using different laser processing parameters. The microstructure, surface roughness and mechanical properties are investigated. Welded joints are mechanically treated by laser in order to improve the surface and mechanical characteristics. Mechanical characteristics are determined by tensile test, and fractures and laser treated weld surfaces are observed by scanning and optical microscopy. Surface topography is analysed by optical profilometry and micro hardness is measured by Vickers method.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Surface modification of laser welded nimonic 263 sheets",
pages = "156-153",
number = "3",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2115"
}

Petronić, S., Burzić, M., Milovanović, D., Čolić, K.,& Perković, S.. (2015). Surface modification of laser welded nimonic 263 sheets. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 15(3), 153-156.
https://hdl.handle.net/21.15107/rcub_machinery_2115

Petronić S, Burzić M, Milovanović D, Čolić K, Perković S. Surface modification of laser welded nimonic 263 sheets. in Structural Integrity and Life. 2015;15(3):153-156.
https://hdl.handle.net/21.15107/rcub_machinery_2115 .

Petronić, Sanja, Burzić, Meri, Milovanović, D., Čolić, Katarina, Perković, Srđa, "Surface modification of laser welded nimonic 263 sheets" in Structural Integrity and Life, 15, no. 3 (2015):153-156,
https://hdl.handle.net/21.15107/rcub_machinery_2115 .