TY  - CONF
AU  - Erić-Cekić, Olivera
AU  - Rajnović, Dragan
AU  - Šiđanin, Leposava
AU  - Janjatović, Petar
AU  - Baloš, Sebastian
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3251
AB  - During the last few years, there has been an increased interest in improving the strength of ductile iron by means of heat-treating to obtain dual phase microstructures that enhance the properties found in the Austempered Ductile Irons (ADI). Therefore, additional research int this field is well motivated. An example of this is the innovative dual phase austempered irons - DP-ADI, that has a greater ductility than the conventionally heat treated ADI, due to its microstructure composed of ausferrite (regular ADI microstructure) and free (proeutectoid) allotriomorphic ferrite. Additionally, dual phase ADI could provide a wide range of mechanical properties as a function of the relative proportion of proeutectoid ferrite and ausferrite constituents, thereby replacing conventional ductile iron. Hence, dual phase ADI will be appropriate for new applications in the critical parts, where a combination of high strength and ductility is a pressing requirement. Furthermore, with the introduction of free ferrite into the matrix increased machinability of ADI could be achieved. The aim of this paper was to review works that have been published over the past years on the effects of process variables, mechanical properties, microstructure and applications of Dual phase Austempered Ductile Iron and to present some own results. This review is an attempt to assemble the results of the worldwide sudden increase in research and development that followed the announcement of the first production of the DP-ADI material.
PB  - Springer International Publishing Ag, Cham
C3  - Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019
T1  - Dual Phase Austempered Ductile Iron - The Material Revolution and Its Engineering Applications
EP  - 38
SP  - 22
VL  - 90
DO  - 10.1007/978-3-030-30853-7_2
ER  - 

@conference{
author = "Erić-Cekić, Olivera and Rajnović, Dragan and Šiđanin, Leposava and Janjatović, Petar and Baloš, Sebastian",
year = "2020",
abstract = "During the last few years, there has been an increased interest in improving the strength of ductile iron by means of heat-treating to obtain dual phase microstructures that enhance the properties found in the Austempered Ductile Irons (ADI). Therefore, additional research int this field is well motivated. An example of this is the innovative dual phase austempered irons - DP-ADI, that has a greater ductility than the conventionally heat treated ADI, due to its microstructure composed of ausferrite (regular ADI microstructure) and free (proeutectoid) allotriomorphic ferrite. Additionally, dual phase ADI could provide a wide range of mechanical properties as a function of the relative proportion of proeutectoid ferrite and ausferrite constituents, thereby replacing conventional ductile iron. Hence, dual phase ADI will be appropriate for new applications in the critical parts, where a combination of high strength and ductility is a pressing requirement. Furthermore, with the introduction of free ferrite into the matrix increased machinability of ADI could be achieved. The aim of this paper was to review works that have been published over the past years on the effects of process variables, mechanical properties, microstructure and applications of Dual phase Austempered Ductile Iron and to present some own results. This review is an attempt to assemble the results of the worldwide sudden increase in research and development that followed the announcement of the first production of the DP-ADI material.",
publisher = "Springer International Publishing Ag, Cham",
journal = "Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019",
title = "Dual Phase Austempered Ductile Iron - The Material Revolution and Its Engineering Applications",
pages = "38-22",
volume = "90",
doi = "10.1007/978-3-030-30853-7_2"
}

Erić-Cekić, O., Rajnović, D., Šiđanin, L., Janjatović, P.,& Baloš, S.. (2020). Dual Phase Austempered Ductile Iron - The Material Revolution and Its Engineering Applications. in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019
Springer International Publishing Ag, Cham., 90, 22-38.
https://doi.org/10.1007/978-3-030-30853-7_2

Erić-Cekić O, Rajnović D, Šiđanin L, Janjatović P, Baloš S. Dual Phase Austempered Ductile Iron - The Material Revolution and Its Engineering Applications. in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019. 2020;90:22-38.
doi:10.1007/978-3-030-30853-7_2 .

Erić-Cekić, Olivera, Rajnović, Dragan, Šiđanin, Leposava, Janjatović, Petar, Baloš, Sebastian, "Dual Phase Austempered Ductile Iron - The Material Revolution and Its Engineering Applications" in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019, 90 (2020):22-38,
https://doi.org/10.1007/978-3-030-30853-7_2 . .

TY  - JOUR
AU  - Baloš, Sebastian
AU  - Radisavljević, Igor
AU  - Rajnović, Dragan
AU  - Janjatović, P.
AU  - Dramićanin, Miroslav 
AU  - Erić-Cekić, Olivera
AU  - Šiđanin, Leposava
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3043
AB  - In this study, the performance of austempered compacted graphite iron was evaluated to find its suitability as perforated plates used in add-on armour. Perforated compacted graphite plates were subjected to austenitisation at 900 degrees C for 2 h followed by austempering at 275 and 400 degrees C for 1 h. The basic plate was fixed at 400 mm away from the perforated plate and armour and then piercing incendiary projectile was shot from a distance of 100 m. It was observed that both 7 mm and 9 mm perforated plates austempered at lower temperature of 275 degrees C producing higher hardness and lower ductility were effective in fracturing the penetrating core, thereby significantly decreasing the chances of penetrating the basic plate.
PB  - Defence Scientific Information Documentation Centre, Delhi
T2  - Defence Science Journal
T1  - Ballistic Behaviour of Austempered Compacted Graphite Iron Perforated Plates
EP  - 576
IS  - 6
SP  - 571
VL  - 69
DO  - 10.14429/dsj.69.14010
ER  - 

@article{
author = "Baloš, Sebastian and Radisavljević, Igor and Rajnović, Dragan and Janjatović, P. and Dramićanin, Miroslav  and Erić-Cekić, Olivera and Šiđanin, Leposava",
year = "2019",
abstract = "In this study, the performance of austempered compacted graphite iron was evaluated to find its suitability as perforated plates used in add-on armour. Perforated compacted graphite plates were subjected to austenitisation at 900 degrees C for 2 h followed by austempering at 275 and 400 degrees C for 1 h. The basic plate was fixed at 400 mm away from the perforated plate and armour and then piercing incendiary projectile was shot from a distance of 100 m. It was observed that both 7 mm and 9 mm perforated plates austempered at lower temperature of 275 degrees C producing higher hardness and lower ductility were effective in fracturing the penetrating core, thereby significantly decreasing the chances of penetrating the basic plate.",
publisher = "Defence Scientific Information Documentation Centre, Delhi",
journal = "Defence Science Journal",
title = "Ballistic Behaviour of Austempered Compacted Graphite Iron Perforated Plates",
pages = "576-571",
number = "6",
volume = "69",
doi = "10.14429/dsj.69.14010"
}

Baloš, S., Radisavljević, I., Rajnović, D., Janjatović, P., Dramićanin, M., Erić-Cekić, O.,& Šiđanin, L.. (2019). Ballistic Behaviour of Austempered Compacted Graphite Iron Perforated Plates. in Defence Science Journal
Defence Scientific Information Documentation Centre, Delhi., 69(6), 571-576.
https://doi.org/10.14429/dsj.69.14010

Baloš S, Radisavljević I, Rajnović D, Janjatović P, Dramićanin M, Erić-Cekić O, Šiđanin L. Ballistic Behaviour of Austempered Compacted Graphite Iron Perforated Plates. in Defence Science Journal. 2019;69(6):571-576.
doi:10.14429/dsj.69.14010 .

Baloš, Sebastian, Radisavljević, Igor, Rajnović, Dragan, Janjatović, P., Dramićanin, Miroslav , Erić-Cekić, Olivera, Šiđanin, Leposava, "Ballistic Behaviour of Austempered Compacted Graphite Iron Perforated Plates" in Defence Science Journal, 69, no. 6 (2019):571-576,
https://doi.org/10.14429/dsj.69.14010 . .

TY  - JOUR
AU  - Erić-Cekić, Olivera
AU  - Dojčinović, Marina
AU  - Rajnović, Dragan
AU  - Šiđanin, Leposava
AU  - Baloš, Sebastian
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2779
AB  - In this paper, the study of cavitation behaviour of austempered ductile iron (ADI) alloyed with copper, as well as copper and nickel with a fully ausferritic microstructure, is presented. The ADI materials used were austenitized at 900 degrees C and austempered at 350 degrees C having an ausferrite microstructure with 16 and 19% of austenite, respectively. The experimental investigations were conducted using the ultrasonically induced cavitation test method. The results show that the cavitation damage was initiated at graphite nodules, as well as in the interface between a graphite nodule and an ausferrite matrix. The cavitation rate revealed that the ADI material alloyed with Cu + Ni austempered at 350 degrees C/3h has a higher cavitation resistance in water than ADI alloyed with Cu. An increased cavitation resistance of the ADI material alloyed with Cu and Ni is due to the matrix hardening by stress assisted phase transformation of austenite into the martensite (SATRAM) phenomenon.
PB  - Taylor & Francis Ltd, Abingdon
T2  - International Journal of Cast Metals Research
T1  - Microstructure and cavitation behaviour of alloyed austempered ductile irons
EP  - 287
IS  - 5
SP  - 279
VL  - 31
DO  - 10.1080/13640461.2018.1446385
ER  - 

@article{
author = "Erić-Cekić, Olivera and Dojčinović, Marina and Rajnović, Dragan and Šiđanin, Leposava and Baloš, Sebastian",
year = "2018",
abstract = "In this paper, the study of cavitation behaviour of austempered ductile iron (ADI) alloyed with copper, as well as copper and nickel with a fully ausferritic microstructure, is presented. The ADI materials used were austenitized at 900 degrees C and austempered at 350 degrees C having an ausferrite microstructure with 16 and 19% of austenite, respectively. The experimental investigations were conducted using the ultrasonically induced cavitation test method. The results show that the cavitation damage was initiated at graphite nodules, as well as in the interface between a graphite nodule and an ausferrite matrix. The cavitation rate revealed that the ADI material alloyed with Cu + Ni austempered at 350 degrees C/3h has a higher cavitation resistance in water than ADI alloyed with Cu. An increased cavitation resistance of the ADI material alloyed with Cu and Ni is due to the matrix hardening by stress assisted phase transformation of austenite into the martensite (SATRAM) phenomenon.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "International Journal of Cast Metals Research",
title = "Microstructure and cavitation behaviour of alloyed austempered ductile irons",
pages = "287-279",
number = "5",
volume = "31",
doi = "10.1080/13640461.2018.1446385"
}

Erić-Cekić, O., Dojčinović, M., Rajnović, D., Šiđanin, L.,& Baloš, S.. (2018). Microstructure and cavitation behaviour of alloyed austempered ductile irons. in International Journal of Cast Metals Research
Taylor & Francis Ltd, Abingdon., 31(5), 279-287.
https://doi.org/10.1080/13640461.2018.1446385

Erić-Cekić O, Dojčinović M, Rajnović D, Šiđanin L, Baloš S. Microstructure and cavitation behaviour of alloyed austempered ductile irons. in International Journal of Cast Metals Research. 2018;31(5):279-287.
doi:10.1080/13640461.2018.1446385 .

Erić-Cekić, Olivera, Dojčinović, Marina, Rajnović, Dragan, Šiđanin, Leposava, Baloš, Sebastian, "Microstructure and cavitation behaviour of alloyed austempered ductile irons" in International Journal of Cast Metals Research, 31, no. 5 (2018):279-287,
https://doi.org/10.1080/13640461.2018.1446385 . .

TY  - JOUR
AU  - Baloš, Sebastian
AU  - Rajnović, Dragan
AU  - Dramićanin, Miroslav 
AU  - Labus, D.
AU  - Erić-Cekić, Olivera
AU  - Grbović-Novaković, Jasmina
AU  - Šiđanin, Leposava
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2450
AB  - In this paper, the wear rate of ferritic and pearlitic ductile iron, as well as three types of austempered ductile iron (ADI materials), austempered at 300, 350 and 400 degrees C is investigated. Two wear parameters were varied, wear load (0.5, 1.3, 2 kg) and grit paper abrasive grain size (P240, P500, P800). The hardness of ductile iron and stress-assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon in ADI materials were found to play major roles in wear behaviour. The pronounced SATRAM phenomenon was detected for the most severe wear parameters. Another important factor in the occurrence of SATRAM phenomenon is the presence of metastable, low carbon-enriched retained austenite. As a consequence, the wear rate of ADI austempered at 400 degrees C is nearly equivalent to ADI austempered at 300 degrees C at medium and high loading with the coarsest abrasive paper grit tested (P240).
PB  - Taylor & Francis Ltd, Abingdon
T2  - International Journal of Cast Metals Research
T1  - Abrasive wear behaviour of ADI material with various retained austenite content
EP  - 193
IS  - 4
SP  - 187
VL  - 29
DO  - 10.1080/13640461.2015.1125982
ER  - 

@article{
author = "Baloš, Sebastian and Rajnović, Dragan and Dramićanin, Miroslav  and Labus, D. and Erić-Cekić, Olivera and Grbović-Novaković, Jasmina and Šiđanin, Leposava",
year = "2016",
abstract = "In this paper, the wear rate of ferritic and pearlitic ductile iron, as well as three types of austempered ductile iron (ADI materials), austempered at 300, 350 and 400 degrees C is investigated. Two wear parameters were varied, wear load (0.5, 1.3, 2 kg) and grit paper abrasive grain size (P240, P500, P800). The hardness of ductile iron and stress-assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon in ADI materials were found to play major roles in wear behaviour. The pronounced SATRAM phenomenon was detected for the most severe wear parameters. Another important factor in the occurrence of SATRAM phenomenon is the presence of metastable, low carbon-enriched retained austenite. As a consequence, the wear rate of ADI austempered at 400 degrees C is nearly equivalent to ADI austempered at 300 degrees C at medium and high loading with the coarsest abrasive paper grit tested (P240).",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "International Journal of Cast Metals Research",
title = "Abrasive wear behaviour of ADI material with various retained austenite content",
pages = "193-187",
number = "4",
volume = "29",
doi = "10.1080/13640461.2015.1125982"
}

Baloš, S., Rajnović, D., Dramićanin, M., Labus, D., Erić-Cekić, O., Grbović-Novaković, J.,& Šiđanin, L.. (2016). Abrasive wear behaviour of ADI material with various retained austenite content. in International Journal of Cast Metals Research
Taylor & Francis Ltd, Abingdon., 29(4), 187-193.
https://doi.org/10.1080/13640461.2015.1125982

Baloš S, Rajnović D, Dramićanin M, Labus D, Erić-Cekić O, Grbović-Novaković J, Šiđanin L. Abrasive wear behaviour of ADI material with various retained austenite content. in International Journal of Cast Metals Research. 2016;29(4):187-193.
doi:10.1080/13640461.2015.1125982 .

Baloš, Sebastian, Rajnović, Dragan, Dramićanin, Miroslav , Labus, D., Erić-Cekić, Olivera, Grbović-Novaković, Jasmina, Šiđanin, Leposava, "Abrasive wear behaviour of ADI material with various retained austenite content" in International Journal of Cast Metals Research, 29, no. 4 (2016):187-193,
https://doi.org/10.1080/13640461.2015.1125982 . .

TY  - JOUR
AU  - Baloš, Sebastian
AU  - Radisavljević, Igor
AU  - Rajnović, Dragan
AU  - Dramićanin, Miroslav 
AU  - Tabaković, Slobodan
AU  - Erić-Cekić, Olivera
AU  - Šiđanin, Leposava
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2237
AB  - In this paper, austempered ductile iron has been evaluated as an alternative to steel for perforated plates applied in the ballistic protection of military vehicles. The austempering was performed in lower and higher austempering ranges in order to obtain two types of austempered ductile iron: one with a higher strength, and the other with a higher ductility. Perforated plates having two different thicknesses of 7 and 9 mm were mounted in front of basic armour and 12.7 x 99 mm armour piercing incendiary ammunition was fired from 100 m. It was shown that the austempered ductile iron material austempered at a lower temperature has superior ballistic resistance, providing a full (five out of five armour piercing incendiary shots stopped) ballistic resistance if combined with 13 mm basic armour plate. The thicker austempered ductile iron perforated plate provides more significant penetrating core damage, and therefore, lower basic plate damage. On the other hand, the thinner austempered ductile iron material perforated plate can be considered optimal due to its lower weight and higher mass effectiveness. In austempered ductile iron material austempered at a higher temperature, besides a lower hardness, bulk retained low-carbon metastable austenite transforms into martensite through strain induced mechanism, causing a partial brittle fracture.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials & Design
T1  - Geometry, mechanical and ballistic properties of ADI material perforated plates
EP  - 74
SP  - 66
VL  - 83
DO  - 10.1016/j.matdes.2015.05.081
ER  - 

@article{
author = "Baloš, Sebastian and Radisavljević, Igor and Rajnović, Dragan and Dramićanin, Miroslav  and Tabaković, Slobodan and Erić-Cekić, Olivera and Šiđanin, Leposava",
year = "2015",
abstract = "In this paper, austempered ductile iron has been evaluated as an alternative to steel for perforated plates applied in the ballistic protection of military vehicles. The austempering was performed in lower and higher austempering ranges in order to obtain two types of austempered ductile iron: one with a higher strength, and the other with a higher ductility. Perforated plates having two different thicknesses of 7 and 9 mm were mounted in front of basic armour and 12.7 x 99 mm armour piercing incendiary ammunition was fired from 100 m. It was shown that the austempered ductile iron material austempered at a lower temperature has superior ballistic resistance, providing a full (five out of five armour piercing incendiary shots stopped) ballistic resistance if combined with 13 mm basic armour plate. The thicker austempered ductile iron perforated plate provides more significant penetrating core damage, and therefore, lower basic plate damage. On the other hand, the thinner austempered ductile iron material perforated plate can be considered optimal due to its lower weight and higher mass effectiveness. In austempered ductile iron material austempered at a higher temperature, besides a lower hardness, bulk retained low-carbon metastable austenite transforms into martensite through strain induced mechanism, causing a partial brittle fracture.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials & Design",
title = "Geometry, mechanical and ballistic properties of ADI material perforated plates",
pages = "74-66",
volume = "83",
doi = "10.1016/j.matdes.2015.05.081"
}

Baloš, S., Radisavljević, I., Rajnović, D., Dramićanin, M., Tabaković, S., Erić-Cekić, O.,& Šiđanin, L.. (2015). Geometry, mechanical and ballistic properties of ADI material perforated plates. in Materials & Design
Elsevier Sci Ltd, Oxford., 83, 66-74.
https://doi.org/10.1016/j.matdes.2015.05.081

Baloš S, Radisavljević I, Rajnović D, Dramićanin M, Tabaković S, Erić-Cekić O, Šiđanin L. Geometry, mechanical and ballistic properties of ADI material perforated plates. in Materials & Design. 2015;83:66-74.
doi:10.1016/j.matdes.2015.05.081 .

Baloš, Sebastian, Radisavljević, Igor, Rajnović, Dragan, Dramićanin, Miroslav , Tabaković, Slobodan, Erić-Cekić, Olivera, Šiđanin, Leposava, "Geometry, mechanical and ballistic properties of ADI material perforated plates" in Materials & Design, 83 (2015):66-74,
https://doi.org/10.1016/j.matdes.2015.05.081 . .

TY  - JOUR
AU  - Rajnović, Dragan
AU  - Baloš, Sebastian
AU  - Šiđanin, Leposava
AU  - Erić-Cekić, Olivera
AU  - Grbović-Novaković, Jasmina
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2086
AB  - Austempered ductile iron (ADI) is an advanced type of heat treated ductile iron, having comparable mechanical properties as forged steels. However, it was found that in contact with water the mechanical properties of austempered ductile irons decrease, especially their ductility. Despite considerable scientific attention, the cause of this phenomenon remains unclear. Some authors suggested that hydrogen or small atom chemisorption causes the weakening of the surface atomic bonds. To get additional reliable data of that phenomenon, in this paper, two different types of austempered ductile irons were tensile tested in various environments, such as: argon, helium, hydrogen gas and water. It was found that only the hydrogen gas and water gave a statistically significant decrease in mechanical properties, i.e. cause embrittlement. Furthermore, the fracture surface analysis revealed that the morphology of the embrittled zone near the specimen surface shares similarities to the fatigue micro-containing striation-like lines, which indicates that the morphology of the brittle zone may be caused by cyclic local-chemisorption, micro-embrittlement and local-fracture.
PB  - Elsevier Science Inc, New York
T2  - Materials Characterization
T1  - Tensile properties of ADI material in water and gaseous environments
EP  - 33
SP  - 26
VL  - 101
DO  - 10.1016/j.matchar.2015.01.001
ER  - 

@article{
author = "Rajnović, Dragan and Baloš, Sebastian and Šiđanin, Leposava and Erić-Cekić, Olivera and Grbović-Novaković, Jasmina",
year = "2015",
abstract = "Austempered ductile iron (ADI) is an advanced type of heat treated ductile iron, having comparable mechanical properties as forged steels. However, it was found that in contact with water the mechanical properties of austempered ductile irons decrease, especially their ductility. Despite considerable scientific attention, the cause of this phenomenon remains unclear. Some authors suggested that hydrogen or small atom chemisorption causes the weakening of the surface atomic bonds. To get additional reliable data of that phenomenon, in this paper, two different types of austempered ductile irons were tensile tested in various environments, such as: argon, helium, hydrogen gas and water. It was found that only the hydrogen gas and water gave a statistically significant decrease in mechanical properties, i.e. cause embrittlement. Furthermore, the fracture surface analysis revealed that the morphology of the embrittled zone near the specimen surface shares similarities to the fatigue micro-containing striation-like lines, which indicates that the morphology of the brittle zone may be caused by cyclic local-chemisorption, micro-embrittlement and local-fracture.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Tensile properties of ADI material in water and gaseous environments",
pages = "33-26",
volume = "101",
doi = "10.1016/j.matchar.2015.01.001"
}

Rajnović, D., Baloš, S., Šiđanin, L., Erić-Cekić, O.,& Grbović-Novaković, J.. (2015). Tensile properties of ADI material in water and gaseous environments. in Materials Characterization
Elsevier Science Inc, New York., 101, 26-33.
https://doi.org/10.1016/j.matchar.2015.01.001

Rajnović D, Baloš S, Šiđanin L, Erić-Cekić O, Grbović-Novaković J. Tensile properties of ADI material in water and gaseous environments. in Materials Characterization. 2015;101:26-33.
doi:10.1016/j.matchar.2015.01.001 .

Rajnović, Dragan, Baloš, Sebastian, Šiđanin, Leposava, Erić-Cekić, Olivera, Grbović-Novaković, Jasmina, "Tensile properties of ADI material in water and gaseous environments" in Materials Characterization, 101 (2015):26-33,
https://doi.org/10.1016/j.matchar.2015.01.001 . .

TY  - JOUR
AU  - Erić-Cekić, Olivera
AU  - Šiđanin, Leposava
AU  - Rajnović, Dragan
AU  - Baloš, Sebastian
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1909
AB  - The aim of the paper was to investigate the effect of austempering parameters (time and temperature) on the microstructure and mechanical properties of ADI alloyed with 1.5% Cu and 1.6% Ni (in wt.%) in order to establish the optimal processing window. It was shown that the strength, elongation and impact energy strongly depend on the amounts of ausferritic ferrite and retained austenite. A processing window was established according to the results of the kinetics of the isothermal transformation. The results show that the processing window for ADI alloyed with Cu and Ni at 350 degrees C was relatively wide, while the processing window for the isothermal transformation at 400 degrees C becomes narrower and shifted to the left. The processing window of ADI austempered at 300 degrees C is also narrower, but shifted to the right towards the longer times compared to the processing window of ADI austempered at 350 degrees C.
PB  - Korean Inst Metals Materials, Seoul
T2  - Metals and Materials International
T1  - Austempering Kinetics of Cu-Ni Alloyed Austempered Ductile Iron
EP  - 1138
IS  - 6
SP  - 1131
VL  - 20
DO  - 10.1007/s12540-014-6017-3
ER  - 

@article{
author = "Erić-Cekić, Olivera and Šiđanin, Leposava and Rajnović, Dragan and Baloš, Sebastian",
year = "2014",
abstract = "The aim of the paper was to investigate the effect of austempering parameters (time and temperature) on the microstructure and mechanical properties of ADI alloyed with 1.5% Cu and 1.6% Ni (in wt.%) in order to establish the optimal processing window. It was shown that the strength, elongation and impact energy strongly depend on the amounts of ausferritic ferrite and retained austenite. A processing window was established according to the results of the kinetics of the isothermal transformation. The results show that the processing window for ADI alloyed with Cu and Ni at 350 degrees C was relatively wide, while the processing window for the isothermal transformation at 400 degrees C becomes narrower and shifted to the left. The processing window of ADI austempered at 300 degrees C is also narrower, but shifted to the right towards the longer times compared to the processing window of ADI austempered at 350 degrees C.",
publisher = "Korean Inst Metals Materials, Seoul",
journal = "Metals and Materials International",
title = "Austempering Kinetics of Cu-Ni Alloyed Austempered Ductile Iron",
pages = "1138-1131",
number = "6",
volume = "20",
doi = "10.1007/s12540-014-6017-3"
}

Erić-Cekić, O., Šiđanin, L., Rajnović, D.,& Baloš, S.. (2014). Austempering Kinetics of Cu-Ni Alloyed Austempered Ductile Iron. in Metals and Materials International
Korean Inst Metals Materials, Seoul., 20(6), 1131-1138.
https://doi.org/10.1007/s12540-014-6017-3

Erić-Cekić O, Šiđanin L, Rajnović D, Baloš S. Austempering Kinetics of Cu-Ni Alloyed Austempered Ductile Iron. in Metals and Materials International. 2014;20(6):1131-1138.
doi:10.1007/s12540-014-6017-3 .

Erić-Cekić, Olivera, Šiđanin, Leposava, Rajnović, Dragan, Baloš, Sebastian, "Austempering Kinetics of Cu-Ni Alloyed Austempered Ductile Iron" in Metals and Materials International, 20, no. 6 (2014):1131-1138,
https://doi.org/10.1007/s12540-014-6017-3 . .

TY  - JOUR
AU  - Dojčinović, Marina
AU  - Erić, Olivera
AU  - Rajnović, Dragan
AU  - Šiđanin, Leposava
AU  - Baloš, Sebastian
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1729
AB  - This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C having ausferrite microstructure with 16 and 31.4% of retained austenite, respectively. Metallographic examination was carried out to study the morphology of their cavitation-damaged surfaces. Cavitation damage was initiated at graphite nodules as well as in the interface between a graphite nodule and an ausferrite matrix. Furthermore, microcracking and ferrite/retained austenite morphology were proved to be of great importance for cavitation resistance. Mass loss rate revealed that ADI austempered at 400 degrees C has a higher cavitation resistance in water than ADI austempered at 300 degrees C. A higher amount of retained austenite in ADI austempered at 400 degrees C played an important role in increasing cavitation resistance. The good cavitation behaviour of ADI austempered at 400 degrees C was due to the matrix hardening by stress assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon, as shown by X-ray diffraction analysis.
PB  - Elsevier Science Inc, New York
T2  - Materials Characterization
T1  - Effect of austempering temperature on cavitation behaviour of unalloyed ADI material
EP  - 72
SP  - 66
VL  - 82
DO  - 10.1016/j.matchar.2013.05.005
ER  - 

@article{
author = "Dojčinović, Marina and Erić, Olivera and Rajnović, Dragan and Šiđanin, Leposava and Baloš, Sebastian",
year = "2013",
abstract = "This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C having ausferrite microstructure with 16 and 31.4% of retained austenite, respectively. Metallographic examination was carried out to study the morphology of their cavitation-damaged surfaces. Cavitation damage was initiated at graphite nodules as well as in the interface between a graphite nodule and an ausferrite matrix. Furthermore, microcracking and ferrite/retained austenite morphology were proved to be of great importance for cavitation resistance. Mass loss rate revealed that ADI austempered at 400 degrees C has a higher cavitation resistance in water than ADI austempered at 300 degrees C. A higher amount of retained austenite in ADI austempered at 400 degrees C played an important role in increasing cavitation resistance. The good cavitation behaviour of ADI austempered at 400 degrees C was due to the matrix hardening by stress assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon, as shown by X-ray diffraction analysis.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Effect of austempering temperature on cavitation behaviour of unalloyed ADI material",
pages = "72-66",
volume = "82",
doi = "10.1016/j.matchar.2013.05.005"
}

Dojčinović, M., Erić, O., Rajnović, D., Šiđanin, L.,& Baloš, S.. (2013). Effect of austempering temperature on cavitation behaviour of unalloyed ADI material. in Materials Characterization
Elsevier Science Inc, New York., 82, 66-72.
https://doi.org/10.1016/j.matchar.2013.05.005

Dojčinović M, Erić O, Rajnović D, Šiđanin L, Baloš S. Effect of austempering temperature on cavitation behaviour of unalloyed ADI material. in Materials Characterization. 2013;82:66-72.
doi:10.1016/j.matchar.2013.05.005 .

Dojčinović, Marina, Erić, Olivera, Rajnović, Dragan, Šiđanin, Leposava, Baloš, Sebastian, "Effect of austempering temperature on cavitation behaviour of unalloyed ADI material" in Materials Characterization, 82 (2013):66-72,
https://doi.org/10.1016/j.matchar.2013.05.005 . .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan B.
AU  - Erić, Olivera
AU  - Atanasovska, Ivana
AU  - Hut, Nenad T.
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1372
AB  - The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Study on impact properties of creep-resistant steel thermally simulated heat affected zone
EP  - 525
IS  - 2
SP  - 513
VL  - 16
DO  - 10.2298/TSCI111006142M
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan B. and Erić, Olivera and Atanasovska, Ivana and Hut, Nenad T.",
year = "2012",
abstract = "The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Study on impact properties of creep-resistant steel thermally simulated heat affected zone",
pages = "525-513",
number = "2",
volume = "16",
doi = "10.2298/TSCI111006142M"
}

Mitrović, R., Momčilović, D. B., Erić, O., Atanasovska, I.,& Hut, N. T.. (2012). Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(2), 513-525.
https://doi.org/10.2298/TSCI111006142M

Mitrović R, Momčilović DB, Erić O, Atanasovska I, Hut NT. Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science. 2012;16(2):513-525.
doi:10.2298/TSCI111006142M .

Mitrović, Radivoje, Momčilović, Dejan B., Erić, Olivera, Atanasovska, Ivana, Hut, Nenad T., "Study on impact properties of creep-resistant steel thermally simulated heat affected zone" in Thermal Science, 16, no. 2 (2012):513-525,
https://doi.org/10.2298/TSCI111006142M . .

TY  - JOUR
AU  - Rajnović, Dragan
AU  - Erić, Olivera
AU  - Šiđanin, Leposava
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1477
AB  - In present paper the effect of austempering conditions and alloying elements on the microstructure, mechanical properties and processing window of Cu and Cu + Ni alloyed austempered ductile irons has been studied. A new concept of "standard" processing window was suggested as an alternative to the well-known "microstructure" processing window. This concept is based on the ability to achieve mechanical properties required by different standards, namely ASTM, ISO and EN. The results obtained show that alloying with Cu + Ni produced ductile grades of ADI, while alloying with Cu grades of higher strength. The standard processing window depends on the austempering parameters and alloying elements, as well as standard used. The ISO and EN standards give a larger standard processing window compared to the ASTM. It was also shown, that from the engineering point of view, determination of a standard processing window gives great advantage compared to the microstructure processing window where special methods and procedures have to be used.
T2  - Kovove Materialy
T1  - The standard processing window of alloyed ADI materials
EP  - 208
IS  - 3
SP  - 199
VL  - 50
DO  - 10.4149/km-2012-3-199
ER  - 

@article{
author = "Rajnović, Dragan and Erić, Olivera and Šiđanin, Leposava",
year = "2012",
abstract = "In present paper the effect of austempering conditions and alloying elements on the microstructure, mechanical properties and processing window of Cu and Cu + Ni alloyed austempered ductile irons has been studied. A new concept of "standard" processing window was suggested as an alternative to the well-known "microstructure" processing window. This concept is based on the ability to achieve mechanical properties required by different standards, namely ASTM, ISO and EN. The results obtained show that alloying with Cu + Ni produced ductile grades of ADI, while alloying with Cu grades of higher strength. The standard processing window depends on the austempering parameters and alloying elements, as well as standard used. The ISO and EN standards give a larger standard processing window compared to the ASTM. It was also shown, that from the engineering point of view, determination of a standard processing window gives great advantage compared to the microstructure processing window where special methods and procedures have to be used.",
journal = "Kovove Materialy",
title = "The standard processing window of alloyed ADI materials",
pages = "208-199",
number = "3",
volume = "50",
doi = "10.4149/km-2012-3-199"
}

Rajnović, D., Erić, O.,& Šiđanin, L.. (2012). The standard processing window of alloyed ADI materials. in Kovove Materialy, 50(3), 199-208.
https://doi.org/10.4149/km-2012-3-199

Rajnović D, Erić O, Šiđanin L. The standard processing window of alloyed ADI materials. in Kovove Materialy. 2012;50(3):199-208.
doi:10.4149/km-2012-3-199 .

Rajnović, Dragan, Erić, Olivera, Šiđanin, Leposava, "The standard processing window of alloyed ADI materials" in Kovove Materialy, 50, no. 3 (2012):199-208,
https://doi.org/10.4149/km-2012-3-199 . .