TY  - JOUR
AU  - Pavkov, Vladimir
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Cvijović-Alagić, Ivana
AU  - Prekajski-Dordjević, Marija
AU  - Bucevac, Dušan
AU  - Matović, Branko
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3787
AB  - In the present study, andesite basalt originated from the deposit site ???Donje Jarinje???, Serbia, was examined as a potential raw material for high-density ceramics production. The production of high-density ceramics included dry milling, homogenization, cold isostatic pressing and sintering in the air. To determine the optimal processing parameters the sintering was conducted at 1040, 1050, 1060, 1070 and 1080 ??C, and afterwards the sintering duration was varied from 30 to 240 min at the optimal sintering temperature of 1060 ??C. Characterization of the starting and sintered materials included the estimation of particle size distribution, density, hardness and fracture toughness complemented with X-ray diffraction, optical light microscopy, scanning electron microscopy and energy dispersive spectroscopy analysis. Phase transformations did not occur during processing in the investigated temperature range from 1040 to 1080 ??C. The obtained research results showed that 99.5% of relative density and the highest hardness and fracture toughness values of 6.7 GPa and 2.2 MPa??m1/2, respectively, were achieved for the andesite basalt sintered at 1060 ??C for 60 min in the air. The results of the present study confirmed that the sintered andesite basalt can be used as a high-density ceramic material for various industrial applications.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - High-density ceramics obtained by andesite basalt sintering
EP  - 152
IS  - 2
SP  - 143
VL  - 16
DO  - 10.2298/PAC2202143P
ER  - 

@article{
author = "Pavkov, Vladimir and Bakić, Gordana and Maksimović, Vesna and Cvijović-Alagić, Ivana and Prekajski-Dordjević, Marija and Bucevac, Dušan and Matović, Branko",
year = "2022",
abstract = "In the present study, andesite basalt originated from the deposit site ???Donje Jarinje???, Serbia, was examined as a potential raw material for high-density ceramics production. The production of high-density ceramics included dry milling, homogenization, cold isostatic pressing and sintering in the air. To determine the optimal processing parameters the sintering was conducted at 1040, 1050, 1060, 1070 and 1080 ??C, and afterwards the sintering duration was varied from 30 to 240 min at the optimal sintering temperature of 1060 ??C. Characterization of the starting and sintered materials included the estimation of particle size distribution, density, hardness and fracture toughness complemented with X-ray diffraction, optical light microscopy, scanning electron microscopy and energy dispersive spectroscopy analysis. Phase transformations did not occur during processing in the investigated temperature range from 1040 to 1080 ??C. The obtained research results showed that 99.5% of relative density and the highest hardness and fracture toughness values of 6.7 GPa and 2.2 MPa??m1/2, respectively, were achieved for the andesite basalt sintered at 1060 ??C for 60 min in the air. The results of the present study confirmed that the sintered andesite basalt can be used as a high-density ceramic material for various industrial applications.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "High-density ceramics obtained by andesite basalt sintering",
pages = "152-143",
number = "2",
volume = "16",
doi = "10.2298/PAC2202143P"
}

Pavkov, V., Bakić, G., Maksimović, V., Cvijović-Alagić, I., Prekajski-Dordjević, M., Bucevac, D.,& Matović, B.. (2022). High-density ceramics obtained by andesite basalt sintering. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 16(2), 143-152.
https://doi.org/10.2298/PAC2202143P

Pavkov V, Bakić G, Maksimović V, Cvijović-Alagić I, Prekajski-Dordjević M, Bucevac D, Matović B. High-density ceramics obtained by andesite basalt sintering. in Processing and Application of Ceramics. 2022;16(2):143-152.
doi:10.2298/PAC2202143P .

Pavkov, Vladimir, Bakić, Gordana, Maksimović, Vesna, Cvijović-Alagić, Ivana, Prekajski-Dordjević, Marija, Bucevac, Dušan, Matović, Branko, "High-density ceramics obtained by andesite basalt sintering" in Processing and Application of Ceramics, 16, no. 2 (2022):143-152,
https://doi.org/10.2298/PAC2202143P . .

TY  - JOUR
AU  - Musraty, W.
AU  - Međo, Bojan
AU  - Gubeljak, Nenad
AU  - Likeb, A.
AU  - Cvijović-Alagić, Ivana
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2539
AB  - Integrity of pipes is typically assessed by testing fracture mechanics specimens, such as compact tensile (CT) or single-edge notched bending (SENB). However, for some pipe dimensions it is not easy or possible to fabricate a specimen conforming to the requirements of standard procedures. A new type of specimen is proposed recently, which can be advantageous for relatively small pipe diameters and axial defects - the pipe ring notch bend specimen - PRNB. In this work, criteria for failure by ductile fracture of PRNB specimens are determined experimentally and by application of micromechanical analysis. The influence of size of the specimen, as well as size and shape of the stress concentrator, is analysed. The results of this study, along with previous authors' results, lead to the conclusion that the pipe ring specimens can be applied in integrity assessment of pipes with defects. Also, the benefits of their application include much simpler fabrication and the same material history as the pipe itself.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis
EP  - 261
SP  - 247
VL  - 175
DO  - 10.1016/j.engfracmech.2017.01.022
ER  - 

@article{
author = "Musraty, W. and Međo, Bojan and Gubeljak, Nenad and Likeb, A. and Cvijović-Alagić, Ivana and Sedmak, Aleksandar and Rakin, Marko",
year = "2017",
abstract = "Integrity of pipes is typically assessed by testing fracture mechanics specimens, such as compact tensile (CT) or single-edge notched bending (SENB). However, for some pipe dimensions it is not easy or possible to fabricate a specimen conforming to the requirements of standard procedures. A new type of specimen is proposed recently, which can be advantageous for relatively small pipe diameters and axial defects - the pipe ring notch bend specimen - PRNB. In this work, criteria for failure by ductile fracture of PRNB specimens are determined experimentally and by application of micromechanical analysis. The influence of size of the specimen, as well as size and shape of the stress concentrator, is analysed. The results of this study, along with previous authors' results, lead to the conclusion that the pipe ring specimens can be applied in integrity assessment of pipes with defects. Also, the benefits of their application include much simpler fabrication and the same material history as the pipe itself.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis",
pages = "261-247",
volume = "175",
doi = "10.1016/j.engfracmech.2017.01.022"
}

Musraty, W., Međo, B., Gubeljak, N., Likeb, A., Cvijović-Alagić, I., Sedmak, A.,& Rakin, M.. (2017). Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 175, 247-261.
https://doi.org/10.1016/j.engfracmech.2017.01.022

Musraty W, Međo B, Gubeljak N, Likeb A, Cvijović-Alagić I, Sedmak A, Rakin M. Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis. in Engineering Fracture Mechanics. 2017;175:247-261.
doi:10.1016/j.engfracmech.2017.01.022 .

Musraty, W., Međo, Bojan, Gubeljak, Nenad, Likeb, A., Cvijović-Alagić, Ivana, Sedmak, Aleksandar, Rakin, Marko, "Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis" in Engineering Fracture Mechanics, 175 (2017):247-261,
https://doi.org/10.1016/j.engfracmech.2017.01.022 . .

TY  - JOUR
AU  - Manojlović, Dragica
AU  - Dramićanin, Miroslav 
AU  - Milošević, Miloš
AU  - Zeković, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Mitrović, Nenad
AU  - Miletić, Vesna
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2420
AB  - This study investigated the degree of conversion, depth of cure, Vickers hardness, flexural strength, flexural modulus and volumetric shrinkage of experimental composite containing a low shrinkage monomer FIT-852 (FIT; Esstech Inc.) and photoinitiator 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO; Sigma Aldrich) compared to conventional composite containing Bisphenol A-glycidyl methacrylate (BisGMA) and camphorquinone-amine photoinitiator system. The degree of conversion was generally higher in FIT-based composites (45-64% range) than in BisGMA-based composites (34-58% range). Vickers hardness, flexural strength and modulus were higher in BisGMA-based composites. A polywave light-curing unit was generally more efficient in terms of conversion and hardness of experimental composites than a monowave unit. FIT-based composite containing TPO showed the depth of cure below 2 mm irrespective of the curing light. The depth of cure of FIT-based composite containing CQ and BisGMA-based composites with either photoinitiator was in the range of 2.8-3.0 mm. Volumetric shrinkage of FIT-based composite (0.9-5.7% range) was lower than that of BisGMA-based composite (2.2-12% range). FIT may be used as a shrinkage reducing monomer compatible with the conventional CQ-amine system as well as the alternative TPO photoinitiator. However, the depth of cure of FIT_TPO composite requires boosting to achieve clinically recommended thickness of 2 mm.
PB  - Elsevier, Amsterdam
T2  - Materials Science & Engineering C-Materials For Biological Applications
T1  - Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites
EP  - 494
SP  - 487
VL  - 58
DO  - 10.1016/j.msec.2015.08.054
ER  - 

@article{
author = "Manojlović, Dragica and Dramićanin, Miroslav  and Milošević, Miloš and Zeković, Ivana and Cvijović-Alagić, Ivana and Mitrović, Nenad and Miletić, Vesna",
year = "2016",
abstract = "This study investigated the degree of conversion, depth of cure, Vickers hardness, flexural strength, flexural modulus and volumetric shrinkage of experimental composite containing a low shrinkage monomer FIT-852 (FIT; Esstech Inc.) and photoinitiator 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO; Sigma Aldrich) compared to conventional composite containing Bisphenol A-glycidyl methacrylate (BisGMA) and camphorquinone-amine photoinitiator system. The degree of conversion was generally higher in FIT-based composites (45-64% range) than in BisGMA-based composites (34-58% range). Vickers hardness, flexural strength and modulus were higher in BisGMA-based composites. A polywave light-curing unit was generally more efficient in terms of conversion and hardness of experimental composites than a monowave unit. FIT-based composite containing TPO showed the depth of cure below 2 mm irrespective of the curing light. The depth of cure of FIT-based composite containing CQ and BisGMA-based composites with either photoinitiator was in the range of 2.8-3.0 mm. Volumetric shrinkage of FIT-based composite (0.9-5.7% range) was lower than that of BisGMA-based composite (2.2-12% range). FIT may be used as a shrinkage reducing monomer compatible with the conventional CQ-amine system as well as the alternative TPO photoinitiator. However, the depth of cure of FIT_TPO composite requires boosting to achieve clinically recommended thickness of 2 mm.",
publisher = "Elsevier, Amsterdam",
journal = "Materials Science & Engineering C-Materials For Biological Applications",
title = "Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites",
pages = "494-487",
volume = "58",
doi = "10.1016/j.msec.2015.08.054"
}

Manojlović, D., Dramićanin, M., Milošević, M., Zeković, I., Cvijović-Alagić, I., Mitrović, N.,& Miletić, V.. (2016). Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites. in Materials Science & Engineering C-Materials For Biological Applications
Elsevier, Amsterdam., 58, 487-494.
https://doi.org/10.1016/j.msec.2015.08.054

Manojlović D, Dramićanin M, Milošević M, Zeković I, Cvijović-Alagić I, Mitrović N, Miletić V. Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites. in Materials Science & Engineering C-Materials For Biological Applications. 2016;58:487-494.
doi:10.1016/j.msec.2015.08.054 .

Manojlović, Dragica, Dramićanin, Miroslav , Milošević, Miloš, Zeković, Ivana, Cvijović-Alagić, Ivana, Mitrović, Nenad, Miletić, Vesna, "Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites" in Materials Science & Engineering C-Materials For Biological Applications, 58 (2016):487-494,
https://doi.org/10.1016/j.msec.2015.08.054 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Rajković, Viseslava
AU  - Zivić, Fatima
AU  - Mitrović, Slobodan
AU  - Cvijović-Alagić, Ivana
AU  - Jovanović, Milan T.
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1711
AB  - Three copper-based alloys, i.e. two composites reinforced with Al2O3 particles and fabricated through PM route and Cu-Cr-Zr alloy processed by the vacuum melting and casting technique were the object of this investigation. Light microscope, scanning electron microscope (SEM) equipped with electron X-ray spectrometer (EDS) and transmission electron microscope (TEM) were used for microstructural characterization. The ball-on-disc nanotribometer served for wear and friction tests applying low sliding speeds (6, 8 and 10 mm/s) at constant load (1 N). The objective of the paper was to investigate the effect of different processing techniques on microstructure, thermal stability and the tribological characteristics of composites and copper ingot alloy. Nano-sized Al2O3 particles (less than 100 nm in size) are present not only in the copper matrix of Cu-2.5 wt.% Al composite, obtained by internal oxidation, but they are also formed at the grain boundaries preventing the grain growth and providing very small grain size. During the high temperature annealing (in the range 300-950 degrees C) composites behaved much better than the ingot alloy. The highest thermal stability showed Cu-2.5 wt.% Al composite. The pinning effect of nano-sized Al2O3 particles prevents the grain growth slowing down recrystallization of this composite up to 900 degrees C. Micro-sized Al2O3 particles in Cu-5 wt.% Al2O3 composite, processed by mechanical annealing, are not effective in preventing dislocation motion and the grain growth, whereas microstructure of Cu-0.4 wt.% Cr-0.08 wt.% Zr ingot alloy was completely recrystallized around 550 degrees C. Cu-2.5 wt.% Al composite showed the best wear resistance, approximately 2.5 times higher than that of Cu-5 wt.% Al2O3 composite. High hardness and nano-sized Al2O3 particles size combined with the fine-grain structure are the main parameters leading to the improved wear resistance of the Cu-2.5Al composite.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - The effect of processing techniques on microstructural and tribological properties of copper-based alloys
EP  - 654
SP  - 646
VL  - 280
DO  - 10.1016/j.apsusc.2013.05.039
ER  - 

@article{
author = "Vencl, Aleksandar and Rajković, Viseslava and Zivić, Fatima and Mitrović, Slobodan and Cvijović-Alagić, Ivana and Jovanović, Milan T.",
year = "2013",
abstract = "Three copper-based alloys, i.e. two composites reinforced with Al2O3 particles and fabricated through PM route and Cu-Cr-Zr alloy processed by the vacuum melting and casting technique were the object of this investigation. Light microscope, scanning electron microscope (SEM) equipped with electron X-ray spectrometer (EDS) and transmission electron microscope (TEM) were used for microstructural characterization. The ball-on-disc nanotribometer served for wear and friction tests applying low sliding speeds (6, 8 and 10 mm/s) at constant load (1 N). The objective of the paper was to investigate the effect of different processing techniques on microstructure, thermal stability and the tribological characteristics of composites and copper ingot alloy. Nano-sized Al2O3 particles (less than 100 nm in size) are present not only in the copper matrix of Cu-2.5 wt.% Al composite, obtained by internal oxidation, but they are also formed at the grain boundaries preventing the grain growth and providing very small grain size. During the high temperature annealing (in the range 300-950 degrees C) composites behaved much better than the ingot alloy. The highest thermal stability showed Cu-2.5 wt.% Al composite. The pinning effect of nano-sized Al2O3 particles prevents the grain growth slowing down recrystallization of this composite up to 900 degrees C. Micro-sized Al2O3 particles in Cu-5 wt.% Al2O3 composite, processed by mechanical annealing, are not effective in preventing dislocation motion and the grain growth, whereas microstructure of Cu-0.4 wt.% Cr-0.08 wt.% Zr ingot alloy was completely recrystallized around 550 degrees C. Cu-2.5 wt.% Al composite showed the best wear resistance, approximately 2.5 times higher than that of Cu-5 wt.% Al2O3 composite. High hardness and nano-sized Al2O3 particles size combined with the fine-grain structure are the main parameters leading to the improved wear resistance of the Cu-2.5Al composite.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "The effect of processing techniques on microstructural and tribological properties of copper-based alloys",
pages = "654-646",
volume = "280",
doi = "10.1016/j.apsusc.2013.05.039"
}

Vencl, A., Rajković, V., Zivić, F., Mitrović, S., Cvijović-Alagić, I.,& Jovanović, M. T.. (2013). The effect of processing techniques on microstructural and tribological properties of copper-based alloys. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 280, 646-654.
https://doi.org/10.1016/j.apsusc.2013.05.039

Vencl A, Rajković V, Zivić F, Mitrović S, Cvijović-Alagić I, Jovanović MT. The effect of processing techniques on microstructural and tribological properties of copper-based alloys. in Applied Surface Science. 2013;280:646-654.
doi:10.1016/j.apsusc.2013.05.039 .

Vencl, Aleksandar, Rajković, Viseslava, Zivić, Fatima, Mitrović, Slobodan, Cvijović-Alagić, Ivana, Jovanović, Milan T., "The effect of processing techniques on microstructural and tribological properties of copper-based alloys" in Applied Surface Science, 280 (2013):646-654,
https://doi.org/10.1016/j.apsusc.2013.05.039 . .

TY  - JOUR
AU  - Zivić, Fatima
AU  - Babić, M.
AU  - Cvijović-Alagić, Ivana
AU  - Metrović, S.
AU  - Vencl, Aleksandar
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1301
AB  - Tribological behaviour of four different heat-treated Ti6Al4V alloys, during linear reciprocating sliding against alumina, on the microscale was investigated. Experiments were carried out for dry sliding and in the Ringer solution, over a range of loads (100-1000 mN) and speeds (4-12 mm/s). The wear mechanisms were investigated based on observations of worn surfaces. Specific wear rates for tested Ti6Al4V alloy were of order of 10(-7)-10(-4) mm(3)/N m. The lowest wear factor (order of 10(-7) mm(3)/N m) was observed for the Ti6Al4V annealed for I h at 750 degrees C in Ar atmosphere and then cooled down to room temperature in the furnace, tested in the Ringer solution. Load dependence of the wear factor exhibited transition characteristics. Wear mechanism has changed with change of load. The Ringer solution lowered wear factor for all tested conditions.
T2  - Journal of the Balkan Tribological Association
T1  - Wear behaviour of ti6al4v alloy against al2o3 under linear reciprocating sliding
EP  - 36
IS  - 1
SP  - 27
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_vinar_4273
ER  - 

@article{
author = "Zivić, Fatima and Babić, M. and Cvijović-Alagić, Ivana and Metrović, S. and Vencl, Aleksandar",
year = "2011",
abstract = "Tribological behaviour of four different heat-treated Ti6Al4V alloys, during linear reciprocating sliding against alumina, on the microscale was investigated. Experiments were carried out for dry sliding and in the Ringer solution, over a range of loads (100-1000 mN) and speeds (4-12 mm/s). The wear mechanisms were investigated based on observations of worn surfaces. Specific wear rates for tested Ti6Al4V alloy were of order of 10(-7)-10(-4) mm(3)/N m. The lowest wear factor (order of 10(-7) mm(3)/N m) was observed for the Ti6Al4V annealed for I h at 750 degrees C in Ar atmosphere and then cooled down to room temperature in the furnace, tested in the Ringer solution. Load dependence of the wear factor exhibited transition characteristics. Wear mechanism has changed with change of load. The Ringer solution lowered wear factor for all tested conditions.",
journal = "Journal of the Balkan Tribological Association",
title = "Wear behaviour of ti6al4v alloy against al2o3 under linear reciprocating sliding",
pages = "36-27",
number = "1",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_vinar_4273"
}

Zivić, F., Babić, M., Cvijović-Alagić, I., Metrović, S.,& Vencl, A.. (2011). Wear behaviour of ti6al4v alloy against al2o3 under linear reciprocating sliding. in Journal of the Balkan Tribological Association, 17(1), 27-36.
https://hdl.handle.net/21.15107/rcub_vinar_4273

Zivić F, Babić M, Cvijović-Alagić I, Metrović S, Vencl A. Wear behaviour of ti6al4v alloy against al2o3 under linear reciprocating sliding. in Journal of the Balkan Tribological Association. 2011;17(1):27-36.
https://hdl.handle.net/21.15107/rcub_vinar_4273 .

Zivić, Fatima, Babić, M., Cvijović-Alagić, Ivana, Metrović, S., Vencl, Aleksandar, "Wear behaviour of ti6al4v alloy against al2o3 under linear reciprocating sliding" in Journal of the Balkan Tribological Association, 17, no. 1 (2011):27-36,
https://hdl.handle.net/21.15107/rcub_vinar_4273 .

TY  - JOUR
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Dobrojević, M.
AU  - Međo, Bojan
AU  - Cvijović-Alagić, Ivana
AU  - Sedmak, Aleksandar
PY  - 2008
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/770
AB  - The integrity of welded structures depends on the load-carrying capacities of their welded joints. Having in mind that welding process produces a large microstructural gradient through the weld, resulting in variation of mechanical properties, micromechanical analysis that correlates the local stresses and strains with fracture toughness seems to be appropriate to ensure integrity. In this paper, a micromechanical model for ductile fracture has been applied for assessment of the crack growth onset in the strength-mismatched welded joints of various widths. High-strength low-alloyed (HSLA) steel is used as the base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas is used. Two different fillers are selected to obtain over- and undermatched weld metal. Precracked (single-edged notch bend - SENB) specimens are experimentally and numerically analysed in static conditions of external loading. Computations of the void volume fraction ahead of the crack tip are performed using the FE method. Volume fraction of non-metallic inclusions in the materials forming the joint was determined using the quantitative microstructural analysis. Based on the critical value, fc, determined on round tensile specimens, CTOD at ductile crack growth initiation on SENB specimens is determined. It has been found that the micromechanical model enables determination of the constraint effect induced by different widths of the welded joints at the onset of the crack growth in tested specimens.
T2  - Welding in the World
T1  - Ductile crack growth initiation in welded joints - Micromechanical approach
EP  - 302
IS  - SPEC. ISS.
SP  - 297
VL  - 52
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1215
ER  - 

@article{
author = "Rakin, Marko and Gubeljak, Nenad and Dobrojević, M. and Međo, Bojan and Cvijović-Alagić, Ivana and Sedmak, Aleksandar",
year = "2008",
abstract = "The integrity of welded structures depends on the load-carrying capacities of their welded joints. Having in mind that welding process produces a large microstructural gradient through the weld, resulting in variation of mechanical properties, micromechanical analysis that correlates the local stresses and strains with fracture toughness seems to be appropriate to ensure integrity. In this paper, a micromechanical model for ductile fracture has been applied for assessment of the crack growth onset in the strength-mismatched welded joints of various widths. High-strength low-alloyed (HSLA) steel is used as the base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas is used. Two different fillers are selected to obtain over- and undermatched weld metal. Precracked (single-edged notch bend - SENB) specimens are experimentally and numerically analysed in static conditions of external loading. Computations of the void volume fraction ahead of the crack tip are performed using the FE method. Volume fraction of non-metallic inclusions in the materials forming the joint was determined using the quantitative microstructural analysis. Based on the critical value, fc, determined on round tensile specimens, CTOD at ductile crack growth initiation on SENB specimens is determined. It has been found that the micromechanical model enables determination of the constraint effect induced by different widths of the welded joints at the onset of the crack growth in tested specimens.",
journal = "Welding in the World",
title = "Ductile crack growth initiation in welded joints - Micromechanical approach",
pages = "302-297",
number = "SPEC. ISS.",
volume = "52",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1215"
}

Rakin, M., Gubeljak, N., Dobrojević, M., Međo, B., Cvijović-Alagić, I.,& Sedmak, A.. (2008). Ductile crack growth initiation in welded joints - Micromechanical approach. in Welding in the World, 52(SPEC. ISS.), 297-302.
https://hdl.handle.net/21.15107/rcub_technorep_1215

Rakin M, Gubeljak N, Dobrojević M, Međo B, Cvijović-Alagić I, Sedmak A. Ductile crack growth initiation in welded joints - Micromechanical approach. in Welding in the World. 2008;52(SPEC. ISS.):297-302.
https://hdl.handle.net/21.15107/rcub_technorep_1215 .

Rakin, Marko, Gubeljak, Nenad, Dobrojević, M., Međo, Bojan, Cvijović-Alagić, Ivana, Sedmak, Aleksandar, "Ductile crack growth initiation in welded joints - Micromechanical approach" in Welding in the World, 52, no. SPEC. ISS. (2008):297-302,
https://hdl.handle.net/21.15107/rcub_technorep_1215 .

TY  - CONF
AU  - Dobrojević, M.
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Cvijović, Ivana
AU  - Zrilić, Milorad
AU  - Krunich, N.
AU  - Sedmak, Aleksandar
PY  - 2007
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/692
AB  - In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
C3  - Research Trends in Contemporary Materials Science
T1  - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded
EP  - +
SP  - 571
VL  - 555
DO  - 10.4028/www.scientific.net/MSF.555.571
ER  - 

@conference{
author = "Dobrojević, M. and Rakin, Marko and Gubeljak, Nenad and Cvijović, Ivana and Zrilić, Milorad and Krunich, N. and Sedmak, Aleksandar",
year = "2007",
abstract = "In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Research Trends in Contemporary Materials Science",
title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded",
pages = "+-571",
volume = "555",
doi = "10.4028/www.scientific.net/MSF.555.571"
}

Dobrojević, M., Rakin, M., Gubeljak, N., Cvijović, I., Zrilić, M., Krunich, N.,& Sedmak, A.. (2007). Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science
Trans Tech Publications Ltd, Durnten-Zurich., 555, 571-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.571

Dobrojević M, Rakin M, Gubeljak N, Cvijović I, Zrilić M, Krunich N, Sedmak A. Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science. 2007;555:571-+.
doi:10.4028/www.scientific.net/MSF.555.571 .

Dobrojević, M., Rakin, Marko, Gubeljak, Nenad, Cvijović, Ivana, Zrilić, Milorad, Krunich, N., Sedmak, Aleksandar, "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded" in Research Trends in Contemporary Materials Science, 555 (2007):571-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.571 . .

TY  - CONF
AU  - Dobrojević, M.
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Cvijović, Ivana
AU  - Zrilić, Milorad
AU  - Krunich, N.
AU  - Sedmak, Aleksandar
PY  - 2007
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/679
AB  - In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a 0/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.
PB  - Trans Tech Publications Ltd
C3  - Materials Science Forum
T1  - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints
EP  - 576
SP  - 571
VL  - 555
DO  - 10.4028/0-87849-441-3.571
ER  - 

@conference{
author = "Dobrojević, M. and Rakin, Marko and Gubeljak, Nenad and Cvijović, Ivana and Zrilić, Milorad and Krunich, N. and Sedmak, Aleksandar",
year = "2007",
abstract = "In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a 0/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.",
publisher = "Trans Tech Publications Ltd",
journal = "Materials Science Forum",
title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints",
pages = "576-571",
volume = "555",
doi = "10.4028/0-87849-441-3.571"
}

Dobrojević, M., Rakin, M., Gubeljak, N., Cvijović, I., Zrilić, M., Krunich, N.,& Sedmak, A.. (2007). Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints. in Materials Science Forum
Trans Tech Publications Ltd., 555, 571-576.
https://doi.org/10.4028/0-87849-441-3.571

Dobrojević M, Rakin M, Gubeljak N, Cvijović I, Zrilić M, Krunich N, Sedmak A. Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints. in Materials Science Forum. 2007;555:571-576.
doi:10.4028/0-87849-441-3.571 .

Dobrojević, M., Rakin, Marko, Gubeljak, Nenad, Cvijović, Ivana, Zrilić, Milorad, Krunich, N., Sedmak, Aleksandar, "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints" in Materials Science Forum, 555 (2007):571-576,
https://doi.org/10.4028/0-87849-441-3.571 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Mrdak, Mihailo
AU  - Cvijović, Ivana
PY  - 2006
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/634
AB  - Korišćenje legura aluminijuma za izradu blokova motora u automobilskoj industriji rezultira smanjenjem težine i uštedama u potrošnji goriva, a samim tim i smanjenjem zagađenja okoline. Prevlake nanete termički, procesom raspršivanja su jedno od rešenja za poboljšanje, inače loših, triboloških karakteristika aluminijuma. U ovom radu su analizirani mikrostruktura i tribološke karakteristike dva tipa prevlaka na bazi gvožđa i upoređene su sa karakteristikama sivog liva kao standardnog materijala za izradu cilindarskih košuljica. Prevlake su nanete na osnovu od Al-Si legure plazma sprej postupkom u atmosferskim uslovima. Za ispitivanja je korišćen tribometar tipa "epruveta na prstenu" u uslovima klizanja sa podmazivanjem, pri brzini klizanja od 0,5 m/s, pređenom putu od 5000 m i normalnom opterećenju od 450 N. Rezultati triboloških ispitivanja pokazuju da, za date uslove ispitivanja obe prevlake imaju zadovoljavajuće vrednosti habanja i trenja i da mogu biti adekvatna zamena za sivi liv kao materijal za izradu cilindarskih košuljica.
AB  - Using of Al-alloys for producing of engine blocks in automotive industry results in weight savings and lower fuel consumption and therefore reduced pollution. Thermal spray coatings are one of the solutions for improving poor tribological properties of aluminium. In this paper, the microstructures and tribological properties of two types of ferrous thermal spray coatings were analyzed and compared with gray cast iron as a standard material for cylinder blocks. Process used for coating deposition on Al-Si alloy substrate was Atmospheric Plasma Spraying (APS). The pinon- ring tribometer was used to carry out these tests under lubricated sliding conditions, sliding speed of 0.5 m/s, sliding distance of 5000 m and normal load of 450 N. Tribological test results showed that, for the investigated conditions both coatings had satisfactory values of wear and friction and that they could be adequate substitution for gray cast iron as a material for cylinder blocks.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Microstructures and tribological properties of ferrous coatings deposited by APS (atmospheric plasma spraying) on Al-alloy substrate
EP  - 157
IS  - 3
SP  - 151
VL  - 34
UR  - https://hdl.handle.net/21.15107/rcub_machinery_634
ER  - 

@article{
author = "Vencl, Aleksandar and Mrdak, Mihailo and Cvijović, Ivana",
year = "2006",
abstract = "Korišćenje legura aluminijuma za izradu blokova motora u automobilskoj industriji rezultira smanjenjem težine i uštedama u potrošnji goriva, a samim tim i smanjenjem zagađenja okoline. Prevlake nanete termički, procesom raspršivanja su jedno od rešenja za poboljšanje, inače loših, triboloških karakteristika aluminijuma. U ovom radu su analizirani mikrostruktura i tribološke karakteristike dva tipa prevlaka na bazi gvožđa i upoređene su sa karakteristikama sivog liva kao standardnog materijala za izradu cilindarskih košuljica. Prevlake su nanete na osnovu od Al-Si legure plazma sprej postupkom u atmosferskim uslovima. Za ispitivanja je korišćen tribometar tipa "epruveta na prstenu" u uslovima klizanja sa podmazivanjem, pri brzini klizanja od 0,5 m/s, pređenom putu od 5000 m i normalnom opterećenju od 450 N. Rezultati triboloških ispitivanja pokazuju da, za date uslove ispitivanja obe prevlake imaju zadovoljavajuće vrednosti habanja i trenja i da mogu biti adekvatna zamena za sivi liv kao materijal za izradu cilindarskih košuljica., Using of Al-alloys for producing of engine blocks in automotive industry results in weight savings and lower fuel consumption and therefore reduced pollution. Thermal spray coatings are one of the solutions for improving poor tribological properties of aluminium. In this paper, the microstructures and tribological properties of two types of ferrous thermal spray coatings were analyzed and compared with gray cast iron as a standard material for cylinder blocks. Process used for coating deposition on Al-Si alloy substrate was Atmospheric Plasma Spraying (APS). The pinon- ring tribometer was used to carry out these tests under lubricated sliding conditions, sliding speed of 0.5 m/s, sliding distance of 5000 m and normal load of 450 N. Tribological test results showed that, for the investigated conditions both coatings had satisfactory values of wear and friction and that they could be adequate substitution for gray cast iron as a material for cylinder blocks.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Microstructures and tribological properties of ferrous coatings deposited by APS (atmospheric plasma spraying) on Al-alloy substrate",
pages = "157-151",
number = "3",
volume = "34",
url = "https://hdl.handle.net/21.15107/rcub_machinery_634"
}

Vencl, A., Mrdak, M.,& Cvijović, I.. (2006). Microstructures and tribological properties of ferrous coatings deposited by APS (atmospheric plasma spraying) on Al-alloy substrate. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 34(3), 151-157.
https://hdl.handle.net/21.15107/rcub_machinery_634

Vencl A, Mrdak M, Cvijović I. Microstructures and tribological properties of ferrous coatings deposited by APS (atmospheric plasma spraying) on Al-alloy substrate. in FME Transactions. 2006;34(3):151-157.
https://hdl.handle.net/21.15107/rcub_machinery_634 .

Vencl, Aleksandar, Mrdak, Mihailo, Cvijović, Ivana, "Microstructures and tribological properties of ferrous coatings deposited by APS (atmospheric plasma spraying) on Al-alloy substrate" in FME Transactions, 34, no. 3 (2006):151-157,
https://hdl.handle.net/21.15107/rcub_machinery_634 .