TY  - JOUR
AU  - Jovanović, Gvozden
AU  - Glišić, Dragomir
AU  - Dikić, Stefan
AU  - Međo, Bojan
AU  - Marković, Branislav
AU  - Vuković, Nikola
AU  - Radović, Nenad
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6938
AB  - Two medium-carbon microalloyed steels with a predominant acicular ferrite microstructure were investigated in this study in order to determine the initial micro-crack formation mechanism and the role of acicular ferrite structure in cleavage fracture. In order to ensure cleavage fracture, samples were investigated at −196 °C for uniaxial tension and four point bending fracture. Previous investigations have shown that cleavage fracture for steels with a predominant acicular ferrite microstructure has not been initiated by the fracture of coarse TiN particles as in ferrite-pearlite, bainite, or martensitic microalloyed steels. The average maximal thickness of cementite plates measured in this work is 0.798 µm and 0.966 µm, for V and TiV steel, respectively. The corresponding stress values required for their fracture according to Griffith’s equation are 1970 MPa and 1791 MPa, respectively. Estimated values of the effective surface energy for the V steel with an average cementite volume fraction of 3.8% range from 40 Jm−2 to 86 Jm−2, and for the TiV steel with an average cementite volume fraction of 18.3% range from 55 Jm−2 to 82 Jm−2. The fracture of coarse cementite plates was found to not to be responsible for the cleavage fracture initiation in case of both steels.
PB  - MDPI
T2  - Materials
T1  - Determining the Role of Acicular Ferrite Carbides in Cleavage Fracture Crack Initiation for Two Medium Carbon Microalloyed Steels
IS  - 22
SP  - 7192
VL  - 16
DO  - 10.3390/ma16227192
ER  - 

@article{
author = "Jovanović, Gvozden and Glišić, Dragomir and Dikić, Stefan and Međo, Bojan and Marković, Branislav and Vuković, Nikola and Radović, Nenad",
year = "2023",
abstract = "Two medium-carbon microalloyed steels with a predominant acicular ferrite microstructure were investigated in this study in order to determine the initial micro-crack formation mechanism and the role of acicular ferrite structure in cleavage fracture. In order to ensure cleavage fracture, samples were investigated at −196 °C for uniaxial tension and four point bending fracture. Previous investigations have shown that cleavage fracture for steels with a predominant acicular ferrite microstructure has not been initiated by the fracture of coarse TiN particles as in ferrite-pearlite, bainite, or martensitic microalloyed steels. The average maximal thickness of cementite plates measured in this work is 0.798 µm and 0.966 µm, for V and TiV steel, respectively. The corresponding stress values required for their fracture according to Griffith’s equation are 1970 MPa and 1791 MPa, respectively. Estimated values of the effective surface energy for the V steel with an average cementite volume fraction of 3.8% range from 40 Jm−2 to 86 Jm−2, and for the TiV steel with an average cementite volume fraction of 18.3% range from 55 Jm−2 to 82 Jm−2. The fracture of coarse cementite plates was found to not to be responsible for the cleavage fracture initiation in case of both steels.",
publisher = "MDPI",
journal = "Materials",
title = "Determining the Role of Acicular Ferrite Carbides in Cleavage Fracture Crack Initiation for Two Medium Carbon Microalloyed Steels",
number = "22",
pages = "7192",
volume = "16",
doi = "10.3390/ma16227192"
}

Jovanović, G., Glišić, D., Dikić, S., Međo, B., Marković, B., Vuković, N.,& Radović, N.. (2023). Determining the Role of Acicular Ferrite Carbides in Cleavage Fracture Crack Initiation for Two Medium Carbon Microalloyed Steels. in Materials
MDPI., 16(22), 7192.
https://doi.org/10.3390/ma16227192

Jovanović G, Glišić D, Dikić S, Međo B, Marković B, Vuković N, Radović N. Determining the Role of Acicular Ferrite Carbides in Cleavage Fracture Crack Initiation for Two Medium Carbon Microalloyed Steels. in Materials. 2023;16(22):7192.
doi:10.3390/ma16227192 .

Jovanović, Gvozden, Glišić, Dragomir, Dikić, Stefan, Međo, Bojan, Marković, Branislav, Vuković, Nikola, Radović, Nenad, "Determining the Role of Acicular Ferrite Carbides in Cleavage Fracture Crack Initiation for Two Medium Carbon Microalloyed Steels" in Materials, 16, no. 22 (2023):7192,
https://doi.org/10.3390/ma16227192 . .

TY  - JOUR
AU  - Baljozović, Andreja
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Radovanović, Željko
AU  - Baščarević, Zoran
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6592
AB  - The cementless Corail stem is one of the most frequently implanted stems and has undergone several design changes. Currently in use is the third generation, named Corail AMT. Until now, only one third-generation Corail stem neck fracture has been described in 2020. In our paper, we present an almost identical complication with an additional analysis of the fracture using a scanning electron microscope. The revision surgery consisted of changing the broken implant with a Corail revision stem, along with replacing the polyethylene liner and the femoral head with new one, after which the patient achieved a full recovery. According to the available literature, this is the second case of this extremely rare complication.
PB  - Elsevier Inc.
T2  - Arthroplasty Today
T1  - An Extremely Rare Case of Cementless Third Generation Corail Stem Neck Fracture With Fractographic Analysis
SP  - 101176
VL  - 22
DO  - 10.1016/j.artd.2023.101176
ER  - 

@article{
author = "Baljozović, Andreja and Glišić, Dragomir and Radović, Nenad and Radovanović, Željko and Baščarević, Zoran",
year = "2023",
abstract = "The cementless Corail stem is one of the most frequently implanted stems and has undergone several design changes. Currently in use is the third generation, named Corail AMT. Until now, only one third-generation Corail stem neck fracture has been described in 2020. In our paper, we present an almost identical complication with an additional analysis of the fracture using a scanning electron microscope. The revision surgery consisted of changing the broken implant with a Corail revision stem, along with replacing the polyethylene liner and the femoral head with new one, after which the patient achieved a full recovery. According to the available literature, this is the second case of this extremely rare complication.",
publisher = "Elsevier Inc.",
journal = "Arthroplasty Today",
title = "An Extremely Rare Case of Cementless Third Generation Corail Stem Neck Fracture With Fractographic Analysis",
pages = "101176",
volume = "22",
doi = "10.1016/j.artd.2023.101176"
}

Baljozović, A., Glišić, D., Radović, N., Radovanović, Ž.,& Baščarević, Z.. (2023). An Extremely Rare Case of Cementless Third Generation Corail Stem Neck Fracture With Fractographic Analysis. in Arthroplasty Today
Elsevier Inc.., 22, 101176.
https://doi.org/10.1016/j.artd.2023.101176

Baljozović A, Glišić D, Radović N, Radovanović Ž, Baščarević Z. An Extremely Rare Case of Cementless Third Generation Corail Stem Neck Fracture With Fractographic Analysis. in Arthroplasty Today. 2023;22:101176.
doi:10.1016/j.artd.2023.101176 .

Baljozović, Andreja, Glišić, Dragomir, Radović, Nenad, Radovanović, Željko, Baščarević, Zoran, "An Extremely Rare Case of Cementless Third Generation Corail Stem Neck Fracture With Fractographic Analysis" in Arthroplasty Today, 22 (2023):101176,
https://doi.org/10.1016/j.artd.2023.101176 . .

TY  - JOUR
AU  - Dikić, Stefan
AU  - Glišić, Dragomir
AU  - Fadel, Abdunaser Hamza
AU  - Jovanović, Gvozden
AU  - Radović, Nenad
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5285
AB  - The aim of this work was to establish a temperature of finish rolling stage of Nb/Ti microalloyed steel containing 0.06 wt.% C, 0.77 wt.% Mn, 0.039 wt.% Nb and 0.015 wt.% Ti, using physical simulation. Samples were subjected to laboratory simulation at a twist plastometer at high temperatures, i.e. between 825 and 950 °C. Five pass deformation and interpass times were selected in accordance with a processing parameters at five stand finishing hot strip mill. Restoration (recovery and/or recrystallization) behavior was evaluated by calculation of Fraction Softening (FS) and Area Softening Parameter (ASP) values. At 950 °C all individual pass stress-strain curves, FS and ASP show full recrystallization in all interpass intervals. On the other hand, with a decrease in temperature to the interval of 875-825 °C, the extent of restoration is decreasing, leading to recovery as a sole softening mechanism at 825 °C, which was confirmed by the stress-strain curve shape, and values of FS and ASP. It is assumed that, due to high supersaturation, strain-induced precipitation promoted pinning of grain and subgrain boundaries and suppressed recrystallization. Therefore, the critical temperature for finish rolling was estimated to be 825 °C.
AB  - Cilj ovog rada je određivanje temperature završnog valjanja Nb/Ti mikrolegiranog čelika koji sadrži
0,06 % C, 0,77 % Mn, 0,039 % Nb i 0,015 % Ti. Uzorci su ispitivani laboratorijskom simulacijom, na plastomeru - uredjaju za ispitivanje uvijanjem, na temperaturama, između 825 i 950 °C. Režim deformacije u
pet provlaka i pauza između provlaka odabrani su u saglasnosti sa parametraima valjanja na petostanskoj završnoj valjačkoj pruzi valjaonice toplovaljanih traka. Udeo obnovljene mikrostrukture (oporavljanja i/ili rekristalizacije) je određivan na osnovu proračuna prekidnog omekšavanja (engl. fraction
softening, FS) i parametra omekšavanja na osnovu promene površine ispod krive (engl. area softening
parameter, ASP). Na 950 °C krive deformacionog ojačavanja za svaki provlak, FS i ASP pokazuju
ponašanje koje odgovara potpuno rekristalisanom uzorku. Udeo obnovljene mikrostrukture se smanjuje
sa sniženjem temperature do intervala 875-850°C. Pretpostavlja se da zbog velikog presićenja dolazi do
pojave taloženja izazvanog deformacijom, što utiče na smanjenje pokretljivosti granica zrna/subzrna što
dovodi do potiskivanja rekristalizacije. Na 825°C obnavljanje se odvija isključivo mehanizmom oporavljanja pa se ova temperatura može uzeti za kritičnu temperaturu završnog valjanja.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Physical simulation of finish rolling of microalloyed steels in isothermal conditions
T1  - Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima
EP  - 236
IS  - 4
SP  - 227
VL  - 76
DO  - 10.2298/HEMIND220816018D
ER  - 

@article{
author = "Dikić, Stefan and Glišić, Dragomir and Fadel, Abdunaser Hamza and Jovanović, Gvozden and Radović, Nenad",
year = "2022",
abstract = "The aim of this work was to establish a temperature of finish rolling stage of Nb/Ti microalloyed steel containing 0.06 wt.% C, 0.77 wt.% Mn, 0.039 wt.% Nb and 0.015 wt.% Ti, using physical simulation. Samples were subjected to laboratory simulation at a twist plastometer at high temperatures, i.e. between 825 and 950 °C. Five pass deformation and interpass times were selected in accordance with a processing parameters at five stand finishing hot strip mill. Restoration (recovery and/or recrystallization) behavior was evaluated by calculation of Fraction Softening (FS) and Area Softening Parameter (ASP) values. At 950 °C all individual pass stress-strain curves, FS and ASP show full recrystallization in all interpass intervals. On the other hand, with a decrease in temperature to the interval of 875-825 °C, the extent of restoration is decreasing, leading to recovery as a sole softening mechanism at 825 °C, which was confirmed by the stress-strain curve shape, and values of FS and ASP. It is assumed that, due to high supersaturation, strain-induced precipitation promoted pinning of grain and subgrain boundaries and suppressed recrystallization. Therefore, the critical temperature for finish rolling was estimated to be 825 °C., Cilj ovog rada je određivanje temperature završnog valjanja Nb/Ti mikrolegiranog čelika koji sadrži
0,06 % C, 0,77 % Mn, 0,039 % Nb i 0,015 % Ti. Uzorci su ispitivani laboratorijskom simulacijom, na plastomeru - uredjaju za ispitivanje uvijanjem, na temperaturama, između 825 i 950 °C. Režim deformacije u
pet provlaka i pauza između provlaka odabrani su u saglasnosti sa parametraima valjanja na petostanskoj završnoj valjačkoj pruzi valjaonice toplovaljanih traka. Udeo obnovljene mikrostrukture (oporavljanja i/ili rekristalizacije) je određivan na osnovu proračuna prekidnog omekšavanja (engl. fraction
softening, FS) i parametra omekšavanja na osnovu promene površine ispod krive (engl. area softening
parameter, ASP). Na 950 °C krive deformacionog ojačavanja za svaki provlak, FS i ASP pokazuju
ponašanje koje odgovara potpuno rekristalisanom uzorku. Udeo obnovljene mikrostrukture se smanjuje
sa sniženjem temperature do intervala 875-850°C. Pretpostavlja se da zbog velikog presićenja dolazi do
pojave taloženja izazvanog deformacijom, što utiče na smanjenje pokretljivosti granica zrna/subzrna što
dovodi do potiskivanja rekristalizacije. Na 825°C obnavljanje se odvija isključivo mehanizmom oporavljanja pa se ova temperatura može uzeti za kritičnu temperaturu završnog valjanja.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Physical simulation of finish rolling of microalloyed steels in isothermal conditions, Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima",
pages = "236-227",
number = "4",
volume = "76",
doi = "10.2298/HEMIND220816018D"
}

Dikić, S., Glišić, D., Fadel, A. H., Jovanović, G.,& Radović, N.. (2022). Physical simulation of finish rolling of microalloyed steels in isothermal conditions. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 76(4), 227-236.
https://doi.org/10.2298/HEMIND220816018D

Dikić S, Glišić D, Fadel AH, Jovanović G, Radović N. Physical simulation of finish rolling of microalloyed steels in isothermal conditions. in Hemijska industrija. 2022;76(4):227-236.
doi:10.2298/HEMIND220816018D .

Dikić, Stefan, Glišić, Dragomir, Fadel, Abdunaser Hamza, Jovanović, Gvozden, Radović, Nenad, "Physical simulation of finish rolling of microalloyed steels in isothermal conditions" in Hemijska industrija, 76, no. 4 (2022):227-236,
https://doi.org/10.2298/HEMIND220816018D . .

TY  - JOUR
AU  - Jovanović, Gvozden
AU  - Glišić, Dragomir
AU  - Dikić, Stefan
AU  - Radović, Nenad
AU  - Patarić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5310
AB  - Cleavage fracture of the V and Ti-V microalloyed forging steels was investigated by the four-point bending testing of the notched specimens of Griffith-Owen’s type at −196◦ C, in conjunction with the finite element analysis and the fractographic examination by scanning electron microscopy. To assess the mixed microstructure consisting mostly of the acicular ferrite, alongside proeutectoid ferrite grains and pearlite, the samples were held at 1250◦ C for 30 min and subsequently cooled instill air. Cleavage fracture was initiated in the matrix under the high plastic strains near the notch root of the four-point bending specimens without the participation of the second phase particles in the process. Estimated values of the effective surface energy for the V and the Ti-V microalloyed steel of 37 Jm−2 and 74 Jm−2, respectively, and the related increase of local critical fracture stress were attributed to the increased content of the acicular ferrite. It was concluded that the observed increase of the local stress for cleavage crack propagation through the matrix was due to the increased number of the high angle boundaries, but also that the acicular ferrite affects the cleavage fracture mechanism by its characteristic stress–strain response with relatively low yield strength and considerable ductility at −196◦ C.
PB  - MDPI
T2  - Materials
T1  - Cleavage Fracture of the Air Cooled Medium Carbon Microalloyed Forging Steels with Heterogeneous Microstructures
IS  - 5
SP  - 1760
VL  - 15
DO  - 10.3390/ma15051760
ER  - 

@article{
author = "Jovanović, Gvozden and Glišić, Dragomir and Dikić, Stefan and Radović, Nenad and Patarić, Aleksandra",
year = "2022",
abstract = "Cleavage fracture of the V and Ti-V microalloyed forging steels was investigated by the four-point bending testing of the notched specimens of Griffith-Owen’s type at −196◦ C, in conjunction with the finite element analysis and the fractographic examination by scanning electron microscopy. To assess the mixed microstructure consisting mostly of the acicular ferrite, alongside proeutectoid ferrite grains and pearlite, the samples were held at 1250◦ C for 30 min and subsequently cooled instill air. Cleavage fracture was initiated in the matrix under the high plastic strains near the notch root of the four-point bending specimens without the participation of the second phase particles in the process. Estimated values of the effective surface energy for the V and the Ti-V microalloyed steel of 37 Jm−2 and 74 Jm−2, respectively, and the related increase of local critical fracture stress were attributed to the increased content of the acicular ferrite. It was concluded that the observed increase of the local stress for cleavage crack propagation through the matrix was due to the increased number of the high angle boundaries, but also that the acicular ferrite affects the cleavage fracture mechanism by its characteristic stress–strain response with relatively low yield strength and considerable ductility at −196◦ C.",
publisher = "MDPI",
journal = "Materials",
title = "Cleavage Fracture of the Air Cooled Medium Carbon Microalloyed Forging Steels with Heterogeneous Microstructures",
number = "5",
pages = "1760",
volume = "15",
doi = "10.3390/ma15051760"
}

Jovanović, G., Glišić, D., Dikić, S., Radović, N.,& Patarić, A.. (2022). Cleavage Fracture of the Air Cooled Medium Carbon Microalloyed Forging Steels with Heterogeneous Microstructures. in Materials
MDPI., 15(5), 1760.
https://doi.org/10.3390/ma15051760

Jovanović G, Glišić D, Dikić S, Radović N, Patarić A. Cleavage Fracture of the Air Cooled Medium Carbon Microalloyed Forging Steels with Heterogeneous Microstructures. in Materials. 2022;15(5):1760.
doi:10.3390/ma15051760 .

Jovanović, Gvozden, Glišić, Dragomir, Dikić, Stefan, Radović, Nenad, Patarić, Aleksandra, "Cleavage Fracture of the Air Cooled Medium Carbon Microalloyed Forging Steels with Heterogeneous Microstructures" in Materials, 15, no. 5 (2022):1760,
https://doi.org/10.3390/ma15051760 . .

TY  - JOUR
AU  - Martinovic, Sanja
AU  - Vlahovic, Milica
AU  - Gajic-Kvascev, Maja
AU  - Vuksanović, Marija M.
AU  - Glišić, Dragomir
AU  - Volkov-Husović, Tatjana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4776
AB  - Pattern recognition techniques are applied to various morphological descriptors to monitor the formation and propagation of surface defects of materials subjected to thermal shock. A low-cement high-alumina castable was synthesized, cured, sintered, and exposed to thermal stability testing using the water quench test. After a certain number of thermal shock cycles, photographs of the samples' surfaces were taken and subjected to image analysis. The influence of the sintering temperature on the morphology of the detected defects was studied using principal component analysis (PCA) as a pattern recognition technique that is the most informative for extracting possible differences. The morphological descriptors of the defects correspond to the previous results regarding the influence of sintering temperature on the structure of a castable during thermal shocks.
T2  - Journal of the European Ceramic Society
T1  - Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock
EP  - 429
IS  - 16
SP  - 423
VL  - 41
DO  - 10.1016/j.jeurceramsoc.2021.08.058
ER  - 

@article{
author = "Martinovic, Sanja and Vlahovic, Milica and Gajic-Kvascev, Maja and Vuksanović, Marija M. and Glišić, Dragomir and Volkov-Husović, Tatjana",
year = "2021",
abstract = "Pattern recognition techniques are applied to various morphological descriptors to monitor the formation and propagation of surface defects of materials subjected to thermal shock. A low-cement high-alumina castable was synthesized, cured, sintered, and exposed to thermal stability testing using the water quench test. After a certain number of thermal shock cycles, photographs of the samples' surfaces were taken and subjected to image analysis. The influence of the sintering temperature on the morphology of the detected defects was studied using principal component analysis (PCA) as a pattern recognition technique that is the most informative for extracting possible differences. The morphological descriptors of the defects correspond to the previous results regarding the influence of sintering temperature on the structure of a castable during thermal shocks.",
journal = "Journal of the European Ceramic Society",
title = "Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock",
pages = "429-423",
number = "16",
volume = "41",
doi = "10.1016/j.jeurceramsoc.2021.08.058"
}

Martinovic, S., Vlahovic, M., Gajic-Kvascev, M., Vuksanović, M. M., Glišić, D.,& Volkov-Husović, T.. (2021). Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock. in Journal of the European Ceramic Society, 41(16), 423-429.
https://doi.org/10.1016/j.jeurceramsoc.2021.08.058

Martinovic S, Vlahovic M, Gajic-Kvascev M, Vuksanović MM, Glišić D, Volkov-Husović T. Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock. in Journal of the European Ceramic Society. 2021;41(16):423-429.
doi:10.1016/j.jeurceramsoc.2021.08.058 .

Martinovic, Sanja, Vlahovic, Milica, Gajic-Kvascev, Maja, Vuksanović, Marija M., Glišić, Dragomir, Volkov-Husović, Tatjana, "Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock" in Journal of the European Ceramic Society, 41, no. 16 (2021):423-429,
https://doi.org/10.1016/j.jeurceramsoc.2021.08.058 . .

TY  - JOUR
AU  - Dikić, Stefan
AU  - Glišić, Dragomir
AU  - Fadel, Abdunnaser
AU  - Jovanovic, Gvozden
AU  - Radović, Nenad
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4873
AB  - Isothermal transformation characteristics of a medium carbon Ti-V microalloyed steel were investigated using light microscopy, scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), and by uniaxial compressive testing. Samples austenitized on 1100 degrees C were isothermally treated in the range from 350 to 600 degrees C and subsequently water quenched. The final microstructure of the samples held at 350 degrees C consisted of bainitic sheaves and had compressive yield strength, approximately from 1000 MPa, which is attributed to high dislocation density of low bainite. At 400 and 450 degrees C, acicular ferrite became prevalent in the microstructure. It was also formed by a displacive mechanism, but the dislocation density was lower, leading to a decrease of compressive yield strength to approximately 700 MPa. The microstructure after the heat treatment at 500 degrees C consisted of coarse non-polygonal ferrite grains separated by pearlite colonies, principally dislocation free grains, so that the compressive YS reached a minimum value of about 700 MPa. The microstructure of the samples heat-treated at 550 and 600 degrees C consisted of pearlite and both grain boundary and intragranular ferrite, alongside with some martensite. After 600 s, austenite became stable and transformed to martensite after water quenching. Therefore, the presence of martensite increased the compressive YS to approx. 800 MPa.
T2  - Metals
T1  - Structure and Strength of Isothermally Heat-Treated Medium Carbon Ti-V Microalloyed Steel
IS  - 7
VL  - 11
DO  - 10.3390/met11071011
ER  - 

@article{
author = "Dikić, Stefan and Glišić, Dragomir and Fadel, Abdunnaser and Jovanovic, Gvozden and Radović, Nenad",
year = "2021",
abstract = "Isothermal transformation characteristics of a medium carbon Ti-V microalloyed steel were investigated using light microscopy, scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), and by uniaxial compressive testing. Samples austenitized on 1100 degrees C were isothermally treated in the range from 350 to 600 degrees C and subsequently water quenched. The final microstructure of the samples held at 350 degrees C consisted of bainitic sheaves and had compressive yield strength, approximately from 1000 MPa, which is attributed to high dislocation density of low bainite. At 400 and 450 degrees C, acicular ferrite became prevalent in the microstructure. It was also formed by a displacive mechanism, but the dislocation density was lower, leading to a decrease of compressive yield strength to approximately 700 MPa. The microstructure after the heat treatment at 500 degrees C consisted of coarse non-polygonal ferrite grains separated by pearlite colonies, principally dislocation free grains, so that the compressive YS reached a minimum value of about 700 MPa. The microstructure of the samples heat-treated at 550 and 600 degrees C consisted of pearlite and both grain boundary and intragranular ferrite, alongside with some martensite. After 600 s, austenite became stable and transformed to martensite after water quenching. Therefore, the presence of martensite increased the compressive YS to approx. 800 MPa.",
journal = "Metals",
title = "Structure and Strength of Isothermally Heat-Treated Medium Carbon Ti-V Microalloyed Steel",
number = "7",
volume = "11",
doi = "10.3390/met11071011"
}

Dikić, S., Glišić, D., Fadel, A., Jovanovic, G.,& Radović, N.. (2021). Structure and Strength of Isothermally Heat-Treated Medium Carbon Ti-V Microalloyed Steel. in Metals, 11(7).
https://doi.org/10.3390/met11071011

Dikić S, Glišić D, Fadel A, Jovanovic G, Radović N. Structure and Strength of Isothermally Heat-Treated Medium Carbon Ti-V Microalloyed Steel. in Metals. 2021;11(7).
doi:10.3390/met11071011 .

Dikić, Stefan, Glišić, Dragomir, Fadel, Abdunnaser, Jovanovic, Gvozden, Radović, Nenad, "Structure and Strength of Isothermally Heat-Treated Medium Carbon Ti-V Microalloyed Steel" in Metals, 11, no. 7 (2021),
https://doi.org/10.3390/met11071011 . .

TY  - JOUR
AU  - Martinovic, Sanja
AU  - Vlahovic, Milica
AU  - Gajić-Kvaščev, Maja
AU  - Vuksanovic, Marija
AU  - Glišić, Dragomir
AU  - Volkov-Husović, Tatjana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4727
AB  - Pattern recognition techniques are applied to various morphological descriptors to monitor the formation and propagation of surface defects of materials subjected to thermal shock. A low-cement high-alumina castable was synthesized, cured, sintered, and exposed to thermal stability testing using the water quench test. After a certain number of thermal shock cycles, photographs of the samples’ surfaces were taken and subjected to image analysis. The influence of the sintering temperature on the morphology of the detected defects was studied using principal component analysis (PCA) as a pattern recognition technique that is the most informative for extracting possible differences. The morphological descriptors of the defects correspond to the previous results regarding the influence of sintering temperature on the structure of a castable during thermal shocks.
PB  - Elsevier Ltd
T2  - Journal of the European Ceramic Society
T1  - Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock
EP  - 429
IS  - 16
SP  - 423
VL  - 41
DO  - 10.1016/j.jeurceramsoc.2021.08.058
ER  - 

@article{
author = "Martinovic, Sanja and Vlahovic, Milica and Gajić-Kvaščev, Maja and Vuksanovic, Marija and Glišić, Dragomir and Volkov-Husović, Tatjana",
year = "2021",
abstract = "Pattern recognition techniques are applied to various morphological descriptors to monitor the formation and propagation of surface defects of materials subjected to thermal shock. A low-cement high-alumina castable was synthesized, cured, sintered, and exposed to thermal stability testing using the water quench test. After a certain number of thermal shock cycles, photographs of the samples’ surfaces were taken and subjected to image analysis. The influence of the sintering temperature on the morphology of the detected defects was studied using principal component analysis (PCA) as a pattern recognition technique that is the most informative for extracting possible differences. The morphological descriptors of the defects correspond to the previous results regarding the influence of sintering temperature on the structure of a castable during thermal shocks.",
publisher = "Elsevier Ltd",
journal = "Journal of the European Ceramic Society",
title = "Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock",
pages = "429-423",
number = "16",
volume = "41",
doi = "10.1016/j.jeurceramsoc.2021.08.058"
}

Martinovic, S., Vlahovic, M., Gajić-Kvaščev, M., Vuksanovic, M., Glišić, D.,& Volkov-Husović, T.. (2021). Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock. in Journal of the European Ceramic Society
Elsevier Ltd., 41(16), 423-429.
https://doi.org/10.1016/j.jeurceramsoc.2021.08.058

Martinovic S, Vlahovic M, Gajić-Kvaščev M, Vuksanovic M, Glišić D, Volkov-Husović T. Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock. in Journal of the European Ceramic Society. 2021;41(16):423-429.
doi:10.1016/j.jeurceramsoc.2021.08.058 .

Martinovic, Sanja, Vlahovic, Milica, Gajić-Kvaščev, Maja, Vuksanovic, Marija, Glišić, Dragomir, Volkov-Husović, Tatjana, "Principal component analysis of morphological descriptors for monitoring surface defects induced by thermal shock" in Journal of the European Ceramic Society, 41, no. 16 (2021):423-429,
https://doi.org/10.1016/j.jeurceramsoc.2021.08.058 . .

TY  - JOUR
AU  - Vuksic-Popovic, M.
AU  - Tanaskovic, J.
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Franklin, F. J.
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4797
AB  - Two modes of failure are analysed for coupling links, the mechanical connections that transmit traction forces between vehicles along the length of a train. Coupling links are designed to withstand the dynamic loads in normal operation but may break if applied loads exceed safe operating limits. Fractography of two failed links revealed that one had failed through brittle fracture, and one through ductile fracture. Metallography indicated that one sample was hardened and tempered with typical tempered martensite microstructure and the other was normalized with a ferrite-pearlite microstructure. A numerical model of a coupling link is developed and validated against experimental data. Results indicate that the failed links experienced loads above the permitted limit.
T2  - Engineering Failure Analysis
T1  - Experimental and numerical research on the failure of railway vehicles coupling links
VL  - 127
DO  - 10.1016/j.engfailanal.2021.105497
ER  - 

@article{
author = "Vuksic-Popovic, M. and Tanaskovic, J. and Glišić, Dragomir and Radović, Nenad and Franklin, F. J.",
year = "2021",
abstract = "Two modes of failure are analysed for coupling links, the mechanical connections that transmit traction forces between vehicles along the length of a train. Coupling links are designed to withstand the dynamic loads in normal operation but may break if applied loads exceed safe operating limits. Fractography of two failed links revealed that one had failed through brittle fracture, and one through ductile fracture. Metallography indicated that one sample was hardened and tempered with typical tempered martensite microstructure and the other was normalized with a ferrite-pearlite microstructure. A numerical model of a coupling link is developed and validated against experimental data. Results indicate that the failed links experienced loads above the permitted limit.",
journal = "Engineering Failure Analysis",
title = "Experimental and numerical research on the failure of railway vehicles coupling links",
volume = "127",
doi = "10.1016/j.engfailanal.2021.105497"
}

Vuksic-Popovic, M., Tanaskovic, J., Glišić, D., Radović, N.,& Franklin, F. J.. (2021). Experimental and numerical research on the failure of railway vehicles coupling links. in Engineering Failure Analysis, 127.
https://doi.org/10.1016/j.engfailanal.2021.105497

Vuksic-Popovic M, Tanaskovic J, Glišić D, Radović N, Franklin FJ. Experimental and numerical research on the failure of railway vehicles coupling links. in Engineering Failure Analysis. 2021;127.
doi:10.1016/j.engfailanal.2021.105497 .

Vuksic-Popovic, M., Tanaskovic, J., Glišić, Dragomir, Radović, Nenad, Franklin, F. J., "Experimental and numerical research on the failure of railway vehicles coupling links" in Engineering Failure Analysis, 127 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105497 . .

TY  - JOUR
AU  - Radović, Nenad
AU  - Vukicević, Goran
AU  - Glišić, Dragomir
AU  - Dikić, Stefan
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4084
AB  - Some aspects of deformation, precipitation, and recrystallization behavior in medium carbon V-microalloyed and low carbon Nb/Ti-microalloyed steels are presented in the paper. Changes in microstructure are explained together with methods of quantification. The temperature of No-recrystallization (Tnr) is defined as a milestone to show the onset of retardation of recrystallization while the apparent activation energy for hot working shows the extent of this retardation. In the case of high cooling rates, this method is not sufficiently sensitive and Trl (recrystallization limit temperature) and Trs (recrystallization stop temperature) must be evaluated from softening data. Paper presented the possibility to estimate Tnr temperature on six stands finishing train at Hot Strip Mill in HBIS Iron and Steel Serbia, Smederevo as well as the activation energy for static recrystallization, QSRX, derived from Tnr temperatures.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Some aspects of physical metallurgy of microalloyed steels
EP  - 263
IS  - 4
SP  - 247
VL  - 25
DO  - 10.30544/468
ER  - 

@article{
author = "Radović, Nenad and Vukicević, Goran and Glišić, Dragomir and Dikić, Stefan",
year = "2019",
abstract = "Some aspects of deformation, precipitation, and recrystallization behavior in medium carbon V-microalloyed and low carbon Nb/Ti-microalloyed steels are presented in the paper. Changes in microstructure are explained together with methods of quantification. The temperature of No-recrystallization (Tnr) is defined as a milestone to show the onset of retardation of recrystallization while the apparent activation energy for hot working shows the extent of this retardation. In the case of high cooling rates, this method is not sufficiently sensitive and Trl (recrystallization limit temperature) and Trs (recrystallization stop temperature) must be evaluated from softening data. Paper presented the possibility to estimate Tnr temperature on six stands finishing train at Hot Strip Mill in HBIS Iron and Steel Serbia, Smederevo as well as the activation energy for static recrystallization, QSRX, derived from Tnr temperatures.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Some aspects of physical metallurgy of microalloyed steels",
pages = "263-247",
number = "4",
volume = "25",
doi = "10.30544/468"
}

Radović, N., Vukicević, G., Glišić, D.,& Dikić, S.. (2019). Some aspects of physical metallurgy of microalloyed steels. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 25(4), 247-263.
https://doi.org/10.30544/468

Radović N, Vukicević G, Glišić D, Dikić S. Some aspects of physical metallurgy of microalloyed steels. in Metallurgical & Materials Engineering. 2019;25(4):247-263.
doi:10.30544/468 .

Radović, Nenad, Vukicević, Goran, Glišić, Dragomir, Dikić, Stefan, "Some aspects of physical metallurgy of microalloyed steels" in Metallurgical & Materials Engineering, 25, no. 4 (2019):247-263,
https://doi.org/10.30544/468 . .

TY  - JOUR
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Drobnjak, Đorđe
AU  - Fadel, Abdunnaser
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3682
AB  - Medium carbon V-microalloyed steel continuously cooled from the austenitization temperature at still air, with predominantly acicular ferrite structure, has been investigated by means of four-point bending of notched Griffiths-Owens's type specimens at liquid nitrogen temperature. Local fracture stress and plastic strain were determined by using finite element analysis and fracture surface examination using scanning electron microscope. It was revealed that cleavage fracture initiation, which takes place close to the notch root in the narrow zone of high plastic strains, is not related to any broken coarse second phase particles. It was assumed that microcracks nucleate by strain induced fracture of pearlite nodules. Two effective surface energy values of 24 and 42 J/m(2) were estimated according to the Griffith's equation, indicating the influence of crystallographic orientation between neighboring grains at the origin of fracture. Lower value was attributed to fracture of coarse ferrite-pearlite units with similar crystallographic orientation and higher value to fracture propagation through fine acicular ferrite matrix.
PB  - Springer-Verlag Berlin, Berlin
T2  - Fracture At All Scales
T1  - Cleavage Fracture in Continuously Cooled V-Microalloyed Medium Carbon Steel
EP  - 219
SP  - 209
DO  - 10.1007/978-3-319-32634-4_11
ER  - 

@article{
author = "Glišić, Dragomir and Radović, Nenad and Drobnjak, Đorđe and Fadel, Abdunnaser",
year = "2017",
abstract = "Medium carbon V-microalloyed steel continuously cooled from the austenitization temperature at still air, with predominantly acicular ferrite structure, has been investigated by means of four-point bending of notched Griffiths-Owens's type specimens at liquid nitrogen temperature. Local fracture stress and plastic strain were determined by using finite element analysis and fracture surface examination using scanning electron microscope. It was revealed that cleavage fracture initiation, which takes place close to the notch root in the narrow zone of high plastic strains, is not related to any broken coarse second phase particles. It was assumed that microcracks nucleate by strain induced fracture of pearlite nodules. Two effective surface energy values of 24 and 42 J/m(2) were estimated according to the Griffith's equation, indicating the influence of crystallographic orientation between neighboring grains at the origin of fracture. Lower value was attributed to fracture of coarse ferrite-pearlite units with similar crystallographic orientation and higher value to fracture propagation through fine acicular ferrite matrix.",
publisher = "Springer-Verlag Berlin, Berlin",
journal = "Fracture At All Scales",
title = "Cleavage Fracture in Continuously Cooled V-Microalloyed Medium Carbon Steel",
pages = "219-209",
doi = "10.1007/978-3-319-32634-4_11"
}

Glišić, D., Radović, N., Drobnjak, Đ.,& Fadel, A.. (2017). Cleavage Fracture in Continuously Cooled V-Microalloyed Medium Carbon Steel. in Fracture At All Scales
Springer-Verlag Berlin, Berlin., 209-219.
https://doi.org/10.1007/978-3-319-32634-4_11

Glišić D, Radović N, Drobnjak Đ, Fadel A. Cleavage Fracture in Continuously Cooled V-Microalloyed Medium Carbon Steel. in Fracture At All Scales. 2017;:209-219.
doi:10.1007/978-3-319-32634-4_11 .

Glišić, Dragomir, Radović, Nenad, Drobnjak, Đorđe, Fadel, Abdunnaser, "Cleavage Fracture in Continuously Cooled V-Microalloyed Medium Carbon Steel" in Fracture At All Scales (2017):209-219,
https://doi.org/10.1007/978-3-319-32634-4_11 . .

TY  - JOUR
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Drobnjak, Đorđe
AU  - Fadel, Abdunnaser
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2799
AB  - Cleavage fracture of the medium carbon V-microalloyed steel with structure consisting of acicular ferrite, pearlite and grain boundary ferrite has been investigated by means of four-point bending of the notched samples at -196 degrees C. It was found that cleavage fracture initiation has not been related to the coarse second phase particles cracking. Calculated values of the effective surface energy of 49 J/m(2) and critical cleavage fracture stress normalized by yield stress of 1.84 are in agreement with the results for the steels with ferrite-pearlite and bainite structures.
PB  - Elsevier Science Bv, Amsterdam
T2  - 20th European Conference on Fracture
T1  - Critical stress for cleavage fracture in continuously cooled medium carbon V-microalloyed steel
EP  - 1231
SP  - 1226
VL  - 3
DO  - 10.1016/j.mspro.2014.06.199
ER  - 

@article{
author = "Glišić, Dragomir and Radović, Nenad and Drobnjak, Đorđe and Fadel, Abdunnaser",
year = "2014",
abstract = "Cleavage fracture of the medium carbon V-microalloyed steel with structure consisting of acicular ferrite, pearlite and grain boundary ferrite has been investigated by means of four-point bending of the notched samples at -196 degrees C. It was found that cleavage fracture initiation has not been related to the coarse second phase particles cracking. Calculated values of the effective surface energy of 49 J/m(2) and critical cleavage fracture stress normalized by yield stress of 1.84 are in agreement with the results for the steels with ferrite-pearlite and bainite structures.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "20th European Conference on Fracture",
title = "Critical stress for cleavage fracture in continuously cooled medium carbon V-microalloyed steel",
pages = "1231-1226",
volume = "3",
doi = "10.1016/j.mspro.2014.06.199"
}

Glišić, D., Radović, N., Drobnjak, Đ.,& Fadel, A.. (2014). Critical stress for cleavage fracture in continuously cooled medium carbon V-microalloyed steel. in 20th European Conference on Fracture
Elsevier Science Bv, Amsterdam., 3, 1226-1231.
https://doi.org/10.1016/j.mspro.2014.06.199

Glišić D, Radović N, Drobnjak Đ, Fadel A. Critical stress for cleavage fracture in continuously cooled medium carbon V-microalloyed steel. in 20th European Conference on Fracture. 2014;3:1226-1231.
doi:10.1016/j.mspro.2014.06.199 .

Glišić, Dragomir, Radović, Nenad, Drobnjak, Đorđe, Fadel, Abdunnaser, "Critical stress for cleavage fracture in continuously cooled medium carbon V-microalloyed steel" in 20th European Conference on Fracture, 3 (2014):1226-1231,
https://doi.org/10.1016/j.mspro.2014.06.199 . .

TY  - JOUR
AU  - Radović, Nenad
AU  - Glišić, Dragomir
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2605
AB  - A significant increase in the research activity dedicated to high manganese TWIP steels has occurred during the past few years, motivated by the breakthrough combination of strength and ductility possessed by these alloys. Here a short review of the relations between microstructure and mechanical properties is presented. This summarized knowledge explains why TWIP steel metallurgy is currently a topic of great practical interest of especially automotive industry.
AB  - Dvojnikovanjem Izazvana Plastičnost (TWinning Induced Plasticity - TWIP) u čelicima je fenomen koji je omogućio razvoj zasebne grupe čelika za koju se pretpostavlja da će imati masovnu upotrebu, naročito u autoindustriji. Mikrostruktura ovih čelika na sobnoj temperaturi se sastoji od austenita koji je stabilisan značajnim dodatkom mangana. U toku deformacije dolazi do dvojnikovanja koje značajno povećava otpor deformaciji, uz zadržavanje odlične plastičnosti, tako da su čvrstoće od 1300-2000 MPa praćene izduženjem od minimalno 45%. Sa vremena istraživanja su više usmerena na ispunjenje tehnoloških zahteva, kao što su zavarljivost, koroziona postojanost, mašinska obradljivost i sl.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Savremeni čelici - dvojnikovanjem izazvana plastičnost
EP  - 42
IS  - 1
SP  - 35
VL  - 59
DO  - 10.5937/zzk1401035R
ER  - 

@article{
author = "Radović, Nenad and Glišić, Dragomir",
year = "2014",
abstract = "A significant increase in the research activity dedicated to high manganese TWIP steels has occurred during the past few years, motivated by the breakthrough combination of strength and ductility possessed by these alloys. Here a short review of the relations between microstructure and mechanical properties is presented. This summarized knowledge explains why TWIP steel metallurgy is currently a topic of great practical interest of especially automotive industry., Dvojnikovanjem Izazvana Plastičnost (TWinning Induced Plasticity - TWIP) u čelicima je fenomen koji je omogućio razvoj zasebne grupe čelika za koju se pretpostavlja da će imati masovnu upotrebu, naročito u autoindustriji. Mikrostruktura ovih čelika na sobnoj temperaturi se sastoji od austenita koji je stabilisan značajnim dodatkom mangana. U toku deformacije dolazi do dvojnikovanja koje značajno povećava otpor deformaciji, uz zadržavanje odlične plastičnosti, tako da su čvrstoće od 1300-2000 MPa praćene izduženjem od minimalno 45%. Sa vremena istraživanja su više usmerena na ispunjenje tehnoloških zahteva, kao što su zavarljivost, koroziona postojanost, mašinska obradljivost i sl.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Savremeni čelici - dvojnikovanjem izazvana plastičnost",
pages = "42-35",
number = "1",
volume = "59",
doi = "10.5937/zzk1401035R"
}

Radović, N.,& Glišić, D.. (2014). Savremeni čelici - dvojnikovanjem izazvana plastičnost. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 59(1), 35-42.
https://doi.org/10.5937/zzk1401035R

Radović N, Glišić D. Savremeni čelici - dvojnikovanjem izazvana plastičnost. in Zavarivanje i zavarene konstrukcije. 2014;59(1):35-42.
doi:10.5937/zzk1401035R .

Radović, Nenad, Glišić, Dragomir, "Savremeni čelici - dvojnikovanjem izazvana plastičnost" in Zavarivanje i zavarene konstrukcije, 59, no. 1 (2014):35-42,
https://doi.org/10.5937/zzk1401035R . .

TY  - JOUR
AU  - Glišić, Dragomir
AU  - Fadel, Abdunnaser
AU  - Radović, Nenad
AU  - Drobnjak, Đorđe
AU  - Zrilić, Milorad
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2338
AB  - The aim of this work was to establish the deformation behavior of two vanadium microalloyed medium carbon steels with different contents of carbon and titanium by tensile testing at 77 K. Samples were reheated at 1250°C for 30 min and continuously cooled in still air. Beside acicular ferrite as the dominant morphology in both microstructures, the steel with lower content of carbon and negligible amount of titanium contains considerable fraction of grain boundary ferrite and pearlite. It was found that Ti-free steel exhibits a higher strain hardening rate and significantly lower elongation at 77 K than the fully acicular ferrite steel. The difference in tensile behavior at 77 K of the two steels has been associated with the influence of the pearlite, together with higher dislocation density of acicular ferrite.
AB  - Čelici mikrolegirani vanadijumom i titanom razvijani su sa ciljem da zamene kaljene i otpuštene srednjeugljenične čelike. Iako ove čelike karakteriše dobra kombinacija čvrstoće i žilavosti, s druge strane zahtevaju naknadnu termičku obradu, koja značajno povećava troškove proizvodnje. Tehnologija dobijanja kontinuirano hlađenih čelika treba da obezbedi mikrostrukturu zahtevanih osobina posle hlađenja na vazduhu. Iz tog razloga je ovim čelicima promenjen sastav, a dobre osobine se obezbeđuju prisustvom acikularnog ferita. Acikularni ferit karakteriše nukleacija unutar prethodnog austenitnog zrna i velika razlika u kristalografskoj orijentaciji pojedinih zrna, odnosno feritnih pločica. Ova isprepletana struktura obezbeđuje povećan otpor kretanju prskotine i žilavost koja je na nivou žilavosti kod tradicionalnih kaljenih i otpuštanih čelika. U radu su ispitivana dva kontinuirano hlađena mikrolegirana čelika sa dodatkom vanadijuma. Struktura čelika bez titana i sa manjim sadržajem ugljenika ('A19') sastoji se od kontinuirane mreže proeutektoidnog ferita uz koji se izdvojio perlit, za kojim sledi acikularni ferit izdvojen unutar nekadašnjeg austenitnog zrna. Struktura čelika sa titanom i većim sadržajem ugljenika ('B22') sastoji se gotovo u potpunosti od acikularnog ferita. Deformaciono ponašanje na 77 K ispitivano je jednoosnim zatezanjem. Ukupno izduženje uzoraka čelika B22 znatno je veće nego kod čelika A19 (10 u odnosu na 5%). Čelik B22 takođe poseduje veću granicu tečenja i zateznu čvrstoću, što je razumljivo s obzirom na veći sadržaj ugljenika. Značajna razlika u duktilnosti na temperaturi tečnog azota u vezi je sa prisustvom perlita kod čelika A19, u odnosu na strukturu acikularnog ferita kod čelika B22. Brzina deformacionog ojačavanja se povećava sa povećanjem udela perlita u strukturi, čime deformacija postaje otežana, dok istovremeno konkurentni proces nastajanja mikroprskotina na krtim cementitnim lamelama ili česticama sekundarnih faza, brzo dovodi do krtog loma na 77 K. S druge strane, acikularni ferit karakteriše povećana gustina dislokacija, što se manifestuje smanjenjem brzine deformacionog ojačavanja, a time i povećanim kapacitetom deformacionog ojačavanja i većim izduženjem kod čelika B22.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Deformation behaviour of two continuously cooled vanadium microalloyed steels at liquid nitrogen temperature
T1  - Deformaciono ponašanje dva kontinuirano hlađena vanadijum mikrolegirana čelika na temperaturi tečnog azota
EP  - 988
IS  - 6
SP  - 981
VL  - 67
DO  - 10.2298/HEMIND121214015G
ER  - 

@article{
author = "Glišić, Dragomir and Fadel, Abdunnaser and Radović, Nenad and Drobnjak, Đorđe and Zrilić, Milorad",
year = "2013",
abstract = "The aim of this work was to establish the deformation behavior of two vanadium microalloyed medium carbon steels with different contents of carbon and titanium by tensile testing at 77 K. Samples were reheated at 1250°C for 30 min and continuously cooled in still air. Beside acicular ferrite as the dominant morphology in both microstructures, the steel with lower content of carbon and negligible amount of titanium contains considerable fraction of grain boundary ferrite and pearlite. It was found that Ti-free steel exhibits a higher strain hardening rate and significantly lower elongation at 77 K than the fully acicular ferrite steel. The difference in tensile behavior at 77 K of the two steels has been associated with the influence of the pearlite, together with higher dislocation density of acicular ferrite., Čelici mikrolegirani vanadijumom i titanom razvijani su sa ciljem da zamene kaljene i otpuštene srednjeugljenične čelike. Iako ove čelike karakteriše dobra kombinacija čvrstoće i žilavosti, s druge strane zahtevaju naknadnu termičku obradu, koja značajno povećava troškove proizvodnje. Tehnologija dobijanja kontinuirano hlađenih čelika treba da obezbedi mikrostrukturu zahtevanih osobina posle hlađenja na vazduhu. Iz tog razloga je ovim čelicima promenjen sastav, a dobre osobine se obezbeđuju prisustvom acikularnog ferita. Acikularni ferit karakteriše nukleacija unutar prethodnog austenitnog zrna i velika razlika u kristalografskoj orijentaciji pojedinih zrna, odnosno feritnih pločica. Ova isprepletana struktura obezbeđuje povećan otpor kretanju prskotine i žilavost koja je na nivou žilavosti kod tradicionalnih kaljenih i otpuštanih čelika. U radu su ispitivana dva kontinuirano hlađena mikrolegirana čelika sa dodatkom vanadijuma. Struktura čelika bez titana i sa manjim sadržajem ugljenika ('A19') sastoji se od kontinuirane mreže proeutektoidnog ferita uz koji se izdvojio perlit, za kojim sledi acikularni ferit izdvojen unutar nekadašnjeg austenitnog zrna. Struktura čelika sa titanom i većim sadržajem ugljenika ('B22') sastoji se gotovo u potpunosti od acikularnog ferita. Deformaciono ponašanje na 77 K ispitivano je jednoosnim zatezanjem. Ukupno izduženje uzoraka čelika B22 znatno je veće nego kod čelika A19 (10 u odnosu na 5%). Čelik B22 takođe poseduje veću granicu tečenja i zateznu čvrstoću, što je razumljivo s obzirom na veći sadržaj ugljenika. Značajna razlika u duktilnosti na temperaturi tečnog azota u vezi je sa prisustvom perlita kod čelika A19, u odnosu na strukturu acikularnog ferita kod čelika B22. Brzina deformacionog ojačavanja se povećava sa povećanjem udela perlita u strukturi, čime deformacija postaje otežana, dok istovremeno konkurentni proces nastajanja mikroprskotina na krtim cementitnim lamelama ili česticama sekundarnih faza, brzo dovodi do krtog loma na 77 K. S druge strane, acikularni ferit karakteriše povećana gustina dislokacija, što se manifestuje smanjenjem brzine deformacionog ojačavanja, a time i povećanim kapacitetom deformacionog ojačavanja i većim izduženjem kod čelika B22.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Deformation behaviour of two continuously cooled vanadium microalloyed steels at liquid nitrogen temperature, Deformaciono ponašanje dva kontinuirano hlađena vanadijum mikrolegirana čelika na temperaturi tečnog azota",
pages = "988-981",
number = "6",
volume = "67",
doi = "10.2298/HEMIND121214015G"
}

Glišić, D., Fadel, A., Radović, N., Drobnjak, Đ.,& Zrilić, M.. (2013). Deformation behaviour of two continuously cooled vanadium microalloyed steels at liquid nitrogen temperature. in Hemijska industrija
Association of Chemical Engineers of Serbia., 67(6), 981-988.
https://doi.org/10.2298/HEMIND121214015G

Glišić D, Fadel A, Radović N, Drobnjak Đ, Zrilić M. Deformation behaviour of two continuously cooled vanadium microalloyed steels at liquid nitrogen temperature. in Hemijska industrija. 2013;67(6):981-988.
doi:10.2298/HEMIND121214015G .

Glišić, Dragomir, Fadel, Abdunnaser, Radović, Nenad, Drobnjak, Đorđe, Zrilić, Milorad, "Deformation behaviour of two continuously cooled vanadium microalloyed steels at liquid nitrogen temperature" in Hemijska industrija, 67, no. 6 (2013):981-988,
https://doi.org/10.2298/HEMIND121214015G . .

TY  - JOUR
AU  - Fadel, Abdunnaser
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Drobnjak, Đorđe
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2380
AB  - The aim of this work was to determine TTT diagram of medium carbon V-N micro-alloyed steel with emphasis on the development of intragranular ferrite morphologies. The isothermal treatment was carried out at 350, 400, 450, 500, 550 and 600°C. These treatments were interrupted at different times in order to analyze the evolution of the microstructure. Metallographic evaluation was done using optical and scanning electron microscopy (SEM). The results show that at high temperatures (≥ 500°C) polygonal intragranulary nucleated ferrite idiomorphs, combined with grain boundary ferrite and pearlite were produced and followed by an incomplete transformation phenomenon. At intermediate temperatures (450, 500°C) an interloced acicular ferrite (AF) microstructure is produced, and at low temperatures (400, 350°C) the sheave of parallel acicular ferrite plates, similar to bainitic sheaves but intragranularly nucleated were observed. In addition to sheaf type acicular ferrite, the grain boundary nucleated bainitic sheaves are observed.
PB  - University of Belgrade, Technical Faculty, Bor
T2  - Journal of Mining and Metallurgy B: Metallurgy
T1  - Intragranular ferrite morphologies in medium carbon vanadium-micro alloyed steel
EP  - 244
IS  - 3
SP  - 237
VL  - 49
DO  - 10.2298/JMMB120820001F
ER  - 

@article{
author = "Fadel, Abdunnaser and Glišić, Dragomir and Radović, Nenad and Drobnjak, Đorđe",
year = "2013",
abstract = "The aim of this work was to determine TTT diagram of medium carbon V-N micro-alloyed steel with emphasis on the development of intragranular ferrite morphologies. The isothermal treatment was carried out at 350, 400, 450, 500, 550 and 600°C. These treatments were interrupted at different times in order to analyze the evolution of the microstructure. Metallographic evaluation was done using optical and scanning electron microscopy (SEM). The results show that at high temperatures (≥ 500°C) polygonal intragranulary nucleated ferrite idiomorphs, combined with grain boundary ferrite and pearlite were produced and followed by an incomplete transformation phenomenon. At intermediate temperatures (450, 500°C) an interloced acicular ferrite (AF) microstructure is produced, and at low temperatures (400, 350°C) the sheave of parallel acicular ferrite plates, similar to bainitic sheaves but intragranularly nucleated were observed. In addition to sheaf type acicular ferrite, the grain boundary nucleated bainitic sheaves are observed.",
publisher = "University of Belgrade, Technical Faculty, Bor",
journal = "Journal of Mining and Metallurgy B: Metallurgy",
title = "Intragranular ferrite morphologies in medium carbon vanadium-micro alloyed steel",
pages = "244-237",
number = "3",
volume = "49",
doi = "10.2298/JMMB120820001F"
}

Fadel, A., Glišić, D., Radović, N.,& Drobnjak, Đ.. (2013). Intragranular ferrite morphologies in medium carbon vanadium-micro alloyed steel. in Journal of Mining and Metallurgy B: Metallurgy
University of Belgrade, Technical Faculty, Bor., 49(3), 237-244.
https://doi.org/10.2298/JMMB120820001F

Fadel A, Glišić D, Radović N, Drobnjak Đ. Intragranular ferrite morphologies in medium carbon vanadium-micro alloyed steel. in Journal of Mining and Metallurgy B: Metallurgy. 2013;49(3):237-244.
doi:10.2298/JMMB120820001F .

Fadel, Abdunnaser, Glišić, Dragomir, Radović, Nenad, Drobnjak, Đorđe, "Intragranular ferrite morphologies in medium carbon vanadium-micro alloyed steel" in Journal of Mining and Metallurgy B: Metallurgy, 49, no. 3 (2013):237-244,
https://doi.org/10.2298/JMMB120820001F . .

TY  - THES
AU  - Glišić, Dragomir
PY  - 2013
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=820
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:7165/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=44711951
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4609
AB  - Two medium carbon vanadium microalloyed foring steels with different content of carbon and titanium were investigated. Broad goals were to examine transformational behavior of the steels on continuous cooling at still air directly from austenitisation temperatures, to determine optimal regime to produce predominantly acicular ferrite structure and to examine it both by means of mechanical behavior and fracture properties at liquid nitrogen temperature. Main goal was to establish micromehanism of cleavage fracture of the steels with predominantly acicular ferrite structure, and to measure critical parameters of cleavage fracture – critical fracture stress and effective fracture surface energy. The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level. The aim of this work was to establish deformation behaviour of two vanadium microalloyed medium carbon steels with different contents of carbon and titanium by tensile testing at 77 K. Samples were reheated at 1250°C/30 min and continuously cooled at still air. Beside acicular ferrite as dominant morphology in both microstructures, the steel with lower content of carbon and negligible amount of titanium contains considerable fraction of grain boundary ferrite and pearlite...
AB  - U radu su ispitivanana dva srednjeugljenična čelika za kovanje, mikrolegirana vanadijumom, koji se međusobno razlikuju po sadržaju titana i ugljenika. V– mikrolegirani čelik sadrži 0,26%C, označen je kao „V19“, i Ti–V– mikrolegirani čelik mikrolegiran je titanom i sadrži 0,31%C, označen kao „TiV22“. Cilj rada bio je da se ispitaju transformacione karakteristike srednjeugljeničnih mikrolegiranih čelika pri kontinuiranom hlađenju na vazduhu, direktno sa temperature austenitizacije, da se odrede uslovi postizanja strukture acikularnog ferita i da se odrede kritični parametri loma cepanjem na temperaturi tečnog azota za ovu strukturu. Čelici su isporučeni kao toplovaljane šipke. Analizom mikrostruktura koje su postignute pri kontinuiranom hlađenju na mirnom vazduhu, direktno sa različitih temperatura austenitizacije, određen je termički režim pripreme uzoraka za ispitivanje. Pripremljeni uzorci čelika sa strukturom acikularnog ferita ispitivani su na temperaturi tečnog azota jednoosnim zatezanjem i savijanjem u četiri tačke. Za ispitivanje savijanjem u četiri tačke korišćene su epruvete sa zarezom po Grifitsu i Ovenu. Temperatura tečnog azota odabrana je radi ispitivanja u uslovima potpuno krtog loma i određivanja kritičnog napona loma. Određivanje kritičnog napona loma obuhvata fraktografiju i modelovanje savijanja u četiri tačke metodom konačnih elemenata. Rezultati jednoosnog zateznog ispitivanja na temperaturi tečnog azota poslužili su kao ulazni podaci za modelovanje. Modelovanjem je izračunata raspodela napona i deformacija u uzorku, u trenutku loma, pri savijanju u četiri tačke. U opsegu temperatura austenitizacije između 850°C i 1300°C, za pripremu uzoraka za ispittivanje izabrana je temperatura od 1250°C. Nakon hlađenja na mirnom vazduhu sa 1250°C, struktura čelika legiranog vanadijumom i sa nižim sadržajem ugljenika (čelik V19) sastoji se od ferita, perlita i acikularnog ferita, dok se struktura čelika legiranog titanom i vanadijumom, sa višim sadržajem ugljenika (čelik TiV22), pretežno sastoji od acikularnog ferita...
PB  - Univerzitet u Beogradu, Tehnološko-metalurški fakultet
T1  - Structure and fracture of medium carbon microalloyed steel
T1  - Struktura i lom u srednjeugljeničnim mikrolegiranim čelicima
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4609
ER  - 

@phdthesis{
author = "Glišić, Dragomir",
year = "2013",
abstract = "Two medium carbon vanadium microalloyed foring steels with different content of carbon and titanium were investigated. Broad goals were to examine transformational behavior of the steels on continuous cooling at still air directly from austenitisation temperatures, to determine optimal regime to produce predominantly acicular ferrite structure and to examine it both by means of mechanical behavior and fracture properties at liquid nitrogen temperature. Main goal was to establish micromehanism of cleavage fracture of the steels with predominantly acicular ferrite structure, and to measure critical parameters of cleavage fracture – critical fracture stress and effective fracture surface energy. The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level. The aim of this work was to establish deformation behaviour of two vanadium microalloyed medium carbon steels with different contents of carbon and titanium by tensile testing at 77 K. Samples were reheated at 1250°C/30 min and continuously cooled at still air. Beside acicular ferrite as dominant morphology in both microstructures, the steel with lower content of carbon and negligible amount of titanium contains considerable fraction of grain boundary ferrite and pearlite..., U radu su ispitivanana dva srednjeugljenična čelika za kovanje, mikrolegirana vanadijumom, koji se međusobno razlikuju po sadržaju titana i ugljenika. V– mikrolegirani čelik sadrži 0,26%C, označen je kao „V19“, i Ti–V– mikrolegirani čelik mikrolegiran je titanom i sadrži 0,31%C, označen kao „TiV22“. Cilj rada bio je da se ispitaju transformacione karakteristike srednjeugljeničnih mikrolegiranih čelika pri kontinuiranom hlađenju na vazduhu, direktno sa temperature austenitizacije, da se odrede uslovi postizanja strukture acikularnog ferita i da se odrede kritični parametri loma cepanjem na temperaturi tečnog azota za ovu strukturu. Čelici su isporučeni kao toplovaljane šipke. Analizom mikrostruktura koje su postignute pri kontinuiranom hlađenju na mirnom vazduhu, direktno sa različitih temperatura austenitizacije, određen je termički režim pripreme uzoraka za ispitivanje. Pripremljeni uzorci čelika sa strukturom acikularnog ferita ispitivani su na temperaturi tečnog azota jednoosnim zatezanjem i savijanjem u četiri tačke. Za ispitivanje savijanjem u četiri tačke korišćene su epruvete sa zarezom po Grifitsu i Ovenu. Temperatura tečnog azota odabrana je radi ispitivanja u uslovima potpuno krtog loma i određivanja kritičnog napona loma. Određivanje kritičnog napona loma obuhvata fraktografiju i modelovanje savijanja u četiri tačke metodom konačnih elemenata. Rezultati jednoosnog zateznog ispitivanja na temperaturi tečnog azota poslužili su kao ulazni podaci za modelovanje. Modelovanjem je izračunata raspodela napona i deformacija u uzorku, u trenutku loma, pri savijanju u četiri tačke. U opsegu temperatura austenitizacije između 850°C i 1300°C, za pripremu uzoraka za ispittivanje izabrana je temperatura od 1250°C. Nakon hlađenja na mirnom vazduhu sa 1250°C, struktura čelika legiranog vanadijumom i sa nižim sadržajem ugljenika (čelik V19) sastoji se od ferita, perlita i acikularnog ferita, dok se struktura čelika legiranog titanom i vanadijumom, sa višim sadržajem ugljenika (čelik TiV22), pretežno sastoji od acikularnog ferita...",
publisher = "Univerzitet u Beogradu, Tehnološko-metalurški fakultet",
title = "Structure and fracture of medium carbon microalloyed steel, Struktura i lom u srednjeugljeničnim mikrolegiranim čelicima",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4609"
}

Glišić, D.. (2013). Structure and fracture of medium carbon microalloyed steel. 
Univerzitet u Beogradu, Tehnološko-metalurški fakultet..
https://hdl.handle.net/21.15107/rcub_technorep_4609

Glišić D. Structure and fracture of medium carbon microalloyed steel. 2013;.
https://hdl.handle.net/21.15107/rcub_technorep_4609 .

Glišić, Dragomir, "Structure and fracture of medium carbon microalloyed steel" (2013),
https://hdl.handle.net/21.15107/rcub_technorep_4609 .

TY  - JOUR
AU  - Fadel, Abdunnaser
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Drobnjak, Đorđe
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2154
AB  - The effect of austenitizing temperature and Cr, Mo and Mn addition on microstructure and mechanical properties of V microalloyed medium carbon steel has been studied by means of metallography and mechanical testing. The addition of Cr, Mn and Mo leads to a decrease in yield strength (YS) by approximate 100 MPa in comparison to the base steel. It is assumed that Mn and Mo increase hardenability by promoting the formation of bainitic sheaves (BS), i.e. by suppressing the formation of ferrite-pearlite and acicular ferrite (FP-AF). Cr at the level used in this work is not that effective. Presence and packet size of bainitic sheaves decrease the Charpy V-notch impact energy at 20 degrees C (CVN20) in comparison to ferrite-pearlite and acicular ferrite microstructures.
PB  - Journal Mater Sci Technol, Shenyang
T2  - Journal of Materials Science & Technology
T1  - Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels
EP  - 1058
IS  - 11
SP  - 1053
VL  - 28
DO  - 10.1016/S1005-0302(12)60172-8
ER  - 

@article{
author = "Fadel, Abdunnaser and Glišić, Dragomir and Radović, Nenad and Drobnjak, Đorđe",
year = "2012",
abstract = "The effect of austenitizing temperature and Cr, Mo and Mn addition on microstructure and mechanical properties of V microalloyed medium carbon steel has been studied by means of metallography and mechanical testing. The addition of Cr, Mn and Mo leads to a decrease in yield strength (YS) by approximate 100 MPa in comparison to the base steel. It is assumed that Mn and Mo increase hardenability by promoting the formation of bainitic sheaves (BS), i.e. by suppressing the formation of ferrite-pearlite and acicular ferrite (FP-AF). Cr at the level used in this work is not that effective. Presence and packet size of bainitic sheaves decrease the Charpy V-notch impact energy at 20 degrees C (CVN20) in comparison to ferrite-pearlite and acicular ferrite microstructures.",
publisher = "Journal Mater Sci Technol, Shenyang",
journal = "Journal of Materials Science & Technology",
title = "Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels",
pages = "1058-1053",
number = "11",
volume = "28",
doi = "10.1016/S1005-0302(12)60172-8"
}

Fadel, A., Glišić, D., Radović, N.,& Drobnjak, Đ.. (2012). Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels. in Journal of Materials Science & Technology
Journal Mater Sci Technol, Shenyang., 28(11), 1053-1058.
https://doi.org/10.1016/S1005-0302(12)60172-8

Fadel A, Glišić D, Radović N, Drobnjak Đ. Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels. in Journal of Materials Science & Technology. 2012;28(11):1053-1058.
doi:10.1016/S1005-0302(12)60172-8 .

Fadel, Abdunnaser, Glišić, Dragomir, Radović, Nenad, Drobnjak, Đorđe, "Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels" in Journal of Materials Science & Technology, 28, no. 11 (2012):1053-1058,
https://doi.org/10.1016/S1005-0302(12)60172-8 . .

TY  - CONF
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Glišić, Dragomir
AU  - Fadel, Abdunnaser
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1635
AB  - The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
C3  - THERMEC 2009, PTS 1-4
T1  - Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels
SP  - 3459
VL  - 638-642
DO  - 10.4028/www.scientific.net/MSF.638-642.3459
ER  - 

@conference{
author = "Radović, Nenad and Koprivica, Ankica and Glišić, Dragomir and Fadel, Abdunnaser and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "THERMEC 2009, PTS 1-4",
title = "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels",
pages = "3459",
volume = "638-642",
doi = "10.4028/www.scientific.net/MSF.638-642.3459"
}

Radović, N., Koprivica, A., Glišić, D., Fadel, A.,& Drobnjak, Đ.. (2010). Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4
Trans Tech Publications Ltd, Durnten-Zurich., 638-642, 3459.
https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459

Radović N, Koprivica A, Glišić D, Fadel A, Drobnjak Đ. Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4. 2010;638-642:3459.
doi:10.4028/www.scientific.net/MSF.638-642.3459 .

Radović, Nenad, Koprivica, Ankica, Glišić, Dragomir, Fadel, Abdunnaser, Drobnjak, Đorđe, "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels" in THERMEC 2009, PTS 1-4, 638-642 (2010):3459,
https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459 . .

TY  - JOUR
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Glišić, Dragomir
AU  - Abdunnaser, Fadel
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1603
AB  - The influence of Cr, Mo and Mn on microstructure and mechanical properties of V-microalloyed medium-carbon steels has been studied by means of metallography and mechanical testing. Cr, Mn and Mo addition promotes the formation of bainitic sheaves suppressing the formation of ferrite-pearlite and acicular ferrite. The influence of Mn is somewhat masked by a low content of nitrogen. In a low nitrogen steel VN particles are not present and the nucleation of acicular ferrite is suppressed. The yield strength of Cr, Mo and Mn alloyed steels with bainite structures is lower in comparison to the base steel due to less pronounced precipitation strengthening effect. The presence of bainitic sheaves decreases the CVN20 impact energy in comparison to ferrite-pearlite and acicular ferrite microstructures.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels
EP  - 9
IS  - 1
SP  - 1
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1603
ER  - 

@article{
author = "Radović, Nenad and Koprivica, Ankica and Glišić, Dragomir and Abdunnaser, Fadel and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of Cr, Mo and Mn on microstructure and mechanical properties of V-microalloyed medium-carbon steels has been studied by means of metallography and mechanical testing. Cr, Mn and Mo addition promotes the formation of bainitic sheaves suppressing the formation of ferrite-pearlite and acicular ferrite. The influence of Mn is somewhat masked by a low content of nitrogen. In a low nitrogen steel VN particles are not present and the nucleation of acicular ferrite is suppressed. The yield strength of Cr, Mo and Mn alloyed steels with bainite structures is lower in comparison to the base steel due to less pronounced precipitation strengthening effect. The presence of bainitic sheaves decreases the CVN20 impact energy in comparison to ferrite-pearlite and acicular ferrite microstructures.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels",
pages = "9-1",
number = "1",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1603"
}

Radović, N., Koprivica, A., Glišić, D., Abdunnaser, F.,& Drobnjak, Đ.. (2010). Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 16(1), 1-9.
https://hdl.handle.net/21.15107/rcub_technorep_1603

Radović N, Koprivica A, Glišić D, Abdunnaser F, Drobnjak Đ. Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels. in Metalurgija. 2010;16(1):1-9.
https://hdl.handle.net/21.15107/rcub_technorep_1603 .

Radović, Nenad, Koprivica, Ankica, Glišić, Dragomir, Abdunnaser, Fadel, Drobnjak, Đorđe, "Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels" in Metalurgija, 16, no. 1 (2010):1-9,
https://hdl.handle.net/21.15107/rcub_technorep_1603 .

TY  - JOUR
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Fadel, Abdunnaser
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1689
AB  - The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite. The effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C, N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN(20) impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.
PB  - Iron Steel Inst Japan Keidanren Kaikan, Tokyo
T2  - ISIJ International
T1  - Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels
EP  - 606
IS  - 4
SP  - 601
VL  - 50
DO  - 10.2355/isijinternational.50.601
ER  - 

@article{
author = "Glišić, Dragomir and Radović, Nenad and Koprivica, Ankica and Fadel, Abdunnaser and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite. The effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C, N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN(20) impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.",
publisher = "Iron Steel Inst Japan Keidanren Kaikan, Tokyo",
journal = "ISIJ International",
title = "Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels",
pages = "606-601",
number = "4",
volume = "50",
doi = "10.2355/isijinternational.50.601"
}

Glišić, D., Radović, N., Koprivica, A., Fadel, A.,& Drobnjak, Đ.. (2010). Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in ISIJ International
Iron Steel Inst Japan Keidanren Kaikan, Tokyo., 50(4), 601-606.
https://doi.org/10.2355/isijinternational.50.601

Glišić D, Radović N, Koprivica A, Fadel A, Drobnjak Đ. Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in ISIJ International. 2010;50(4):601-606.
doi:10.2355/isijinternational.50.601 .

Glišić, Dragomir, Radović, Nenad, Koprivica, Ankica, Fadel, Abdunnaser, Drobnjak, Đorđe, "Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels" in ISIJ International, 50, no. 4 (2010):601-606,
https://doi.org/10.2355/isijinternational.50.601 . .

TY  - CHAP
AU  - Popović, Miljana
AU  - Romhanji, Endre
AU  - Minov, Boris
AU  - Glišić, Dragomir
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7291
AB  - The Al-Mg alloy sheets have been increasingly used for automotive and marine applications as they offer good combination of strength, formability, corrosion resistance and weldability [1-4]. High Mg containing Al-Mg alloys, with more than 3.5 wt% Mg, can achieve high strength level through solid solution and strain hardening effect, but they become susceptible to intergranular corrosion (IGC) and stress corrosion cracking (SCC). This susceptibility is caused by Mg-rich β-phase precipitation at grain boundaries that occurs during sensitization treatment (65-180 °C) [5-8]. The degree of susceptibility to IGC and SCC attack can vary depending on the microstructure of Al-Mg alloys. It has shown [9,10] that microstructures with continuous layer of β-phase precipitates along grain boundaries are highly susceptible to IGC and SCC, while uniformly distributed β-phase particles provide good corrosion resistance. Thus, a good balance of strength and corrosion resistance can be achieved by an optimization of the microstructure development. As those high Mg containing Al-Mg alloy sheets are commonly pass through some shaping processes in automotive and shipbuilding industry, the understanding of microstructure - corrosion - formability relationships appears to be very important. Thus, the aim of this paper was to examine the effect of the microstructure developed under different thermo-mechanical treatments (TMTs) on the susceptibility to stress corrosion cracking and formability of a highly alloyed Al - 6.8 wt% Mg sheets.
PB  - Weinheim : Wiley-WCH verlag GmbH & Co.
T2  - Aluminium Alloys: Their Physical and Mechanical Properties
T1  - SCC Susceptibility and Formability in Relation to Different TMTs of an Al-6.8 wt% Mg Alloy Sheet
EP  - 2162
SP  - 2155
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7291
ER  - 

@inbook{
author = "Popović, Miljana and Romhanji, Endre and Minov, Boris and Glišić, Dragomir",
year = "2008",
abstract = "The Al-Mg alloy sheets have been increasingly used for automotive and marine applications as they offer good combination of strength, formability, corrosion resistance and weldability [1-4]. High Mg containing Al-Mg alloys, with more than 3.5 wt% Mg, can achieve high strength level through solid solution and strain hardening effect, but they become susceptible to intergranular corrosion (IGC) and stress corrosion cracking (SCC). This susceptibility is caused by Mg-rich β-phase precipitation at grain boundaries that occurs during sensitization treatment (65-180 °C) [5-8]. The degree of susceptibility to IGC and SCC attack can vary depending on the microstructure of Al-Mg alloys. It has shown [9,10] that microstructures with continuous layer of β-phase precipitates along grain boundaries are highly susceptible to IGC and SCC, while uniformly distributed β-phase particles provide good corrosion resistance. Thus, a good balance of strength and corrosion resistance can be achieved by an optimization of the microstructure development. As those high Mg containing Al-Mg alloy sheets are commonly pass through some shaping processes in automotive and shipbuilding industry, the understanding of microstructure - corrosion - formability relationships appears to be very important. Thus, the aim of this paper was to examine the effect of the microstructure developed under different thermo-mechanical treatments (TMTs) on the susceptibility to stress corrosion cracking and formability of a highly alloyed Al - 6.8 wt% Mg sheets.",
publisher = "Weinheim : Wiley-WCH verlag GmbH & Co.",
journal = "Aluminium Alloys: Their Physical and Mechanical Properties",
booktitle = "SCC Susceptibility and Formability in Relation to Different TMTs of an Al-6.8 wt% Mg Alloy Sheet",
pages = "2162-2155",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7291"
}

Popović, M., Romhanji, E., Minov, B.,& Glišić, D.. (2008). SCC Susceptibility and Formability in Relation to Different TMTs of an Al-6.8 wt% Mg Alloy Sheet. in Aluminium Alloys: Their Physical and Mechanical Properties
Weinheim : Wiley-WCH verlag GmbH & Co.., 2, 2155-2162.
https://hdl.handle.net/21.15107/rcub_technorep_7291

Popović M, Romhanji E, Minov B, Glišić D. SCC Susceptibility and Formability in Relation to Different TMTs of an Al-6.8 wt% Mg Alloy Sheet. in Aluminium Alloys: Their Physical and Mechanical Properties. 2008;2:2155-2162.
https://hdl.handle.net/21.15107/rcub_technorep_7291 .

Popović, Miljana, Romhanji, Endre, Minov, Boris, Glišić, Dragomir, "SCC Susceptibility and Formability in Relation to Different TMTs of an Al-6.8 wt% Mg Alloy Sheet" in Aluminium Alloys: Their Physical and Mechanical Properties, 2 (2008):2155-2162,
https://hdl.handle.net/21.15107/rcub_technorep_7291 .

TY  - JOUR
AU  - Minov, Boris G.
AU  - Popović, Miljana
AU  - Glišić, Dragomir
AU  - Romhanji, Endre
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1327
AB  - U ovom radu korišćena je aluminijum-magnezijum legura sa 6,8% magnezijuma (Al-Mg6,8), koja pripada grupi Al-Mg legura visoke čvrstoće. Ispitivan je uticaj mikrostrukture, koja se postiže primenom različitih uslova termomehaničke obrade (TMO), na deformaciono ponašanje pri jednoosnom zatezanju, i na sposobnost oblikovanja u uslovima složenog naponsko-deformisanog stanja. Najbolju sposobnost oblikovanja, koja je ocenjena na osnovu parametara ojačavanja u toku jednoosnog zatezanja, i na osnovu graničnih krivih oblikovanja (GKO), konstruisanih po kriterijumu lokalnog stanjivanja i granične visine kupole (GVK), pokazuje ispitivana legura sa rekristalisanom jednofaznom a-Al i/ili dvofaznom (a + β) strukturom.
AB  - Formability of Al-Mg6.8 alloy has been evaluated experimentally in uniaxial tension and biaxial stretching. Three different structures developed after cold rolling and annealing in the range of temperature from 265 to 320 °C: (I) recovered dual (a + β) phase, (II) recrystallized (a + β) dual phase, and (III) recrystallized a-Al single phase structure, were tested. Samples with recovered structure have shown a lower formability level than the samples with fully recrystallized structure. Formability level assessed through FLD and LDH value, has been a result of complex interaction between work hardening ability and strain rate sensitivity.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Uticaj strukture na sposobnost oblikovanja Al-Mg6,8 legure
T1  - Influence of microstructure on the formability of Al-Mg6.8 alloy
EP  - 176
IS  - 3
SP  - 170
VL  - 62
DO  - 10.2298/HEMIND0803170M
ER  - 

@article{
author = "Minov, Boris G. and Popović, Miljana and Glišić, Dragomir and Romhanji, Endre",
year = "2008",
abstract = "U ovom radu korišćena je aluminijum-magnezijum legura sa 6,8% magnezijuma (Al-Mg6,8), koja pripada grupi Al-Mg legura visoke čvrstoće. Ispitivan je uticaj mikrostrukture, koja se postiže primenom različitih uslova termomehaničke obrade (TMO), na deformaciono ponašanje pri jednoosnom zatezanju, i na sposobnost oblikovanja u uslovima složenog naponsko-deformisanog stanja. Najbolju sposobnost oblikovanja, koja je ocenjena na osnovu parametara ojačavanja u toku jednoosnog zatezanja, i na osnovu graničnih krivih oblikovanja (GKO), konstruisanih po kriterijumu lokalnog stanjivanja i granične visine kupole (GVK), pokazuje ispitivana legura sa rekristalisanom jednofaznom a-Al i/ili dvofaznom (a + β) strukturom., Formability of Al-Mg6.8 alloy has been evaluated experimentally in uniaxial tension and biaxial stretching. Three different structures developed after cold rolling and annealing in the range of temperature from 265 to 320 °C: (I) recovered dual (a + β) phase, (II) recrystallized (a + β) dual phase, and (III) recrystallized a-Al single phase structure, were tested. Samples with recovered structure have shown a lower formability level than the samples with fully recrystallized structure. Formability level assessed through FLD and LDH value, has been a result of complex interaction between work hardening ability and strain rate sensitivity.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Uticaj strukture na sposobnost oblikovanja Al-Mg6,8 legure, Influence of microstructure on the formability of Al-Mg6.8 alloy",
pages = "176-170",
number = "3",
volume = "62",
doi = "10.2298/HEMIND0803170M"
}

Minov, B. G., Popović, M., Glišić, D.,& Romhanji, E.. (2008). Uticaj strukture na sposobnost oblikovanja Al-Mg6,8 legure. in Hemijska industrija
Association of Chemical Engineers of Serbia., 62(3), 170-176.
https://doi.org/10.2298/HEMIND0803170M

Minov BG, Popović M, Glišić D, Romhanji E. Uticaj strukture na sposobnost oblikovanja Al-Mg6,8 legure. in Hemijska industrija. 2008;62(3):170-176.
doi:10.2298/HEMIND0803170M .

Minov, Boris G., Popović, Miljana, Glišić, Dragomir, Romhanji, Endre, "Uticaj strukture na sposobnost oblikovanja Al-Mg6,8 legure" in Hemijska industrija, 62, no. 3 (2008):170-176,
https://doi.org/10.2298/HEMIND0803170M . .

TY  - JOUR
AU  - Romhanji, Endre
AU  - Popović, Miljana
AU  - Glišić, Dragomir
AU  - Dodok, Radomir
AU  - Jovanović, D.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/971
AB  - Formability of Al-Mg4.5-Cu0.5 alloy sheets was tested after annealing at different temperatures (220-520 degrees C) and water quenching. The formability (normalized limiting dome heights, LDH/R) showed only a small variation for all the samples with recrystallized structure, i.e. the LDH/R-e(2) curves were within similar to 13% in the range of plane strain deformation. The samples annealed at 280 degrees C experienced a formability level at the upper limit of the band containing all the LDHIR values. The formability rating seems to be the result of the complex interaction of the strain hardening ability and strain rate sensitivity (SRS) due to different structural features developed during different annealing conditions.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Materials Processing Technology
T1  - Effect of annealing temperature on the formability of Al-Mg4.5-Cu0.5 alloy sheets
EP  - 389
IS  - 1-3
SP  - 386
VL  - 177
DO  - 10.1016/j.jmatprotec.2006.04.036
ER  - 

@article{
author = "Romhanji, Endre and Popović, Miljana and Glišić, Dragomir and Dodok, Radomir and Jovanović, D.",
year = "2006",
abstract = "Formability of Al-Mg4.5-Cu0.5 alloy sheets was tested after annealing at different temperatures (220-520 degrees C) and water quenching. The formability (normalized limiting dome heights, LDH/R) showed only a small variation for all the samples with recrystallized structure, i.e. the LDH/R-e(2) curves were within similar to 13% in the range of plane strain deformation. The samples annealed at 280 degrees C experienced a formability level at the upper limit of the band containing all the LDHIR values. The formability rating seems to be the result of the complex interaction of the strain hardening ability and strain rate sensitivity (SRS) due to different structural features developed during different annealing conditions.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Materials Processing Technology",
title = "Effect of annealing temperature on the formability of Al-Mg4.5-Cu0.5 alloy sheets",
pages = "389-386",
number = "1-3",
volume = "177",
doi = "10.1016/j.jmatprotec.2006.04.036"
}

Romhanji, E., Popović, M., Glišić, D., Dodok, R.,& Jovanović, D.. (2006). Effect of annealing temperature on the formability of Al-Mg4.5-Cu0.5 alloy sheets. in Journal of Materials Processing Technology
Elsevier Science Sa, Lausanne., 177(1-3), 386-389.
https://doi.org/10.1016/j.jmatprotec.2006.04.036

Romhanji E, Popović M, Glišić D, Dodok R, Jovanović D. Effect of annealing temperature on the formability of Al-Mg4.5-Cu0.5 alloy sheets. in Journal of Materials Processing Technology. 2006;177(1-3):386-389.
doi:10.1016/j.jmatprotec.2006.04.036 .

Romhanji, Endre, Popović, Miljana, Glišić, Dragomir, Dodok, Radomir, Jovanović, D., "Effect of annealing temperature on the formability of Al-Mg4.5-Cu0.5 alloy sheets" in Journal of Materials Processing Technology, 177, no. 1-3 (2006):386-389,
https://doi.org/10.1016/j.jmatprotec.2006.04.036 . .

TY  - JOUR
AU  - Romhanji, Endre
AU  - Popović, Miljana
AU  - Glišić, Dragomir
AU  - Dodok, Radomir
AU  - Jovanović, D.
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/772
AB  - Deformation behavior of the AlMg4.5Cu0.5 type alloy sheets was examined after cold rolling and annealing in the range of temperature from 220°C to 520°C, water quenching and natural aging. The low temperature annealed samples, characterized by fine grained recrystallized structure and high content of Cu-Mg precipitates, have shown a superior hardening ability in uniaxial tension and formability in biaxial stretching. The natural aging didn't bring any important changes of the properties in respect to the as-quenched condition of the tested material.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Deformation behavior of the AlMg4.5Cu0.5 type alloy sheet
EP  - 274
IS  - 4
SP  - 267
VL  - 11
UR  - https://hdl.handle.net/21.15107/rcub_technorep_772
ER  - 

@article{
author = "Romhanji, Endre and Popović, Miljana and Glišić, Dragomir and Dodok, Radomir and Jovanović, D.",
year = "2005",
abstract = "Deformation behavior of the AlMg4.5Cu0.5 type alloy sheets was examined after cold rolling and annealing in the range of temperature from 220°C to 520°C, water quenching and natural aging. The low temperature annealed samples, characterized by fine grained recrystallized structure and high content of Cu-Mg precipitates, have shown a superior hardening ability in uniaxial tension and formability in biaxial stretching. The natural aging didn't bring any important changes of the properties in respect to the as-quenched condition of the tested material.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Deformation behavior of the AlMg4.5Cu0.5 type alloy sheet",
pages = "274-267",
number = "4",
volume = "11",
url = "https://hdl.handle.net/21.15107/rcub_technorep_772"
}

Romhanji, E., Popović, M., Glišić, D., Dodok, R.,& Jovanović, D.. (2005). Deformation behavior of the AlMg4.5Cu0.5 type alloy sheet. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 11(4), 267-274.
https://hdl.handle.net/21.15107/rcub_technorep_772

Romhanji E, Popović M, Glišić D, Dodok R, Jovanović D. Deformation behavior of the AlMg4.5Cu0.5 type alloy sheet. in Metalurgija. 2005;11(4):267-274.
https://hdl.handle.net/21.15107/rcub_technorep_772 .

Romhanji, Endre, Popović, Miljana, Glišić, Dragomir, Dodok, Radomir, Jovanović, D., "Deformation behavior of the AlMg4.5Cu0.5 type alloy sheet" in Metalurgija, 11, no. 4 (2005):267-274,
https://hdl.handle.net/21.15107/rcub_technorep_772 .

TY  - JOUR
AU  - Romhanji, Endre
AU  - Popović, Miljana
AU  - Glišić, Dragomir
AU  - Stefanović, Milentije
AU  - Milovanović, Milan
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/640
AB  - Aluminium alloys suitable for automotive application were reviewed briefly as well as the reasons for the future wider application of Al-Mg type alloys. Basic problems related to the limited consumption of Al-Mg type alloy sheets in automotive applications as the appearance of stretcher-strain markings and paint baking - induced softening considered. Also, the current knowledge on the promising approaches to overcome those problems was estimated.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - On the Al-Mg alloy sheets for automotive application: Problems and solutions
EP  - 216
IS  - 3
SP  - 205
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_technorep_640
ER  - 

@article{
author = "Romhanji, Endre and Popović, Miljana and Glišić, Dragomir and Stefanović, Milentije and Milovanović, Milan",
year = "2004",
abstract = "Aluminium alloys suitable for automotive application were reviewed briefly as well as the reasons for the future wider application of Al-Mg type alloys. Basic problems related to the limited consumption of Al-Mg type alloy sheets in automotive applications as the appearance of stretcher-strain markings and paint baking - induced softening considered. Also, the current knowledge on the promising approaches to overcome those problems was estimated.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "On the Al-Mg alloy sheets for automotive application: Problems and solutions",
pages = "216-205",
number = "3",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_technorep_640"
}

Romhanji, E., Popović, M., Glišić, D., Stefanović, M.,& Milovanović, M.. (2004). On the Al-Mg alloy sheets for automotive application: Problems and solutions. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 10(3), 205-216.
https://hdl.handle.net/21.15107/rcub_technorep_640

Romhanji E, Popović M, Glišić D, Stefanović M, Milovanović M. On the Al-Mg alloy sheets for automotive application: Problems and solutions. in Metalurgija. 2004;10(3):205-216.
https://hdl.handle.net/21.15107/rcub_technorep_640 .

Romhanji, Endre, Popović, Miljana, Glišić, Dragomir, Stefanović, Milentije, Milovanović, Milan, "On the Al-Mg alloy sheets for automotive application: Problems and solutions" in Metalurgija, 10, no. 3 (2004):205-216,
https://hdl.handle.net/21.15107/rcub_technorep_640 .

TY  - JOUR
AU  - Romhanji, Endre
AU  - Dudukovska, A
AU  - Glišić, Dragomir
PY  - 2002
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/450
AB  - Comprehensive experimental work performed to assess the temperature and strain-rate affected deformation behaviour of commercial AlMg6 type, 1.0 mm thick annealed sheet. Elevated temperature tension test performed at temperatures ranged from 25 to 300 degreesC, and three cross-head rates, giving initial strain rates of epsilon(i) = 6.7 x 10(-4) s(-1), epsilon(2) = 6.7 x 10(-3) s(-1) and epsilon(3) = 6.7 x 10(-2) s(-1). Steady state strain-rate sensitivity (SRS) parameters were calculated (m = d ln sigma/d ln epsilon) for the strain-rate ratios of epsilon(1)/epsilon(2) (1:10), epsilon(2)/epsilon(3) (10:100). It was shown that in the tested AlMg6 alloy sheet the SRS is negative and decreasing type around the room temperature due acting the dynamic strain ageing (DSA). It becomes positive at higher temperatures when the DSA weakening. This transition temperature increases by strain rate. The monotonic increase of the SRS brought by temperature is assumed to be due the enhancement of dynamic recovery and it appeared to be independent on strain rate, except at 300 degreesC. At 300 degreesC decreasing the strain rate brings considerable increase of the SRS. The experienced increase of the terminal m values from similar to0.15 to similar to0.4 for the applied strain-rate ratios of epsilon(1)/epsilon(2) (1:10) and epsilon(2)/epsilon(3) (10:100), respectively, is assumed to be the result of changing the deformation mechanism from recovery to diffusion-controlled solute drag. However, the performed research has shown that the attained increase of the SRS was not followed With appropriate ductility improvement. Analysis of the strain localization (necking) has shown that increasing the strain rate from 6.7 x 10(-4) to 6.7 x 10(-2) s(-1), the temperature brought softening can be compensated, and the process of strain localization (necking) shifted to higher strains.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Materials Processing Technology
T1  - The effect of temperature on strain-rate sensitivity in high strength Al-Mg alloy sheet
EP  - 198
SP  - 193
VL  - 125
DO  - 10.1016/S0924-0136(02)00308-4
ER  - 

@article{
author = "Romhanji, Endre and Dudukovska, A and Glišić, Dragomir",
year = "2002",
abstract = "Comprehensive experimental work performed to assess the temperature and strain-rate affected deformation behaviour of commercial AlMg6 type, 1.0 mm thick annealed sheet. Elevated temperature tension test performed at temperatures ranged from 25 to 300 degreesC, and three cross-head rates, giving initial strain rates of epsilon(i) = 6.7 x 10(-4) s(-1), epsilon(2) = 6.7 x 10(-3) s(-1) and epsilon(3) = 6.7 x 10(-2) s(-1). Steady state strain-rate sensitivity (SRS) parameters were calculated (m = d ln sigma/d ln epsilon) for the strain-rate ratios of epsilon(1)/epsilon(2) (1:10), epsilon(2)/epsilon(3) (10:100). It was shown that in the tested AlMg6 alloy sheet the SRS is negative and decreasing type around the room temperature due acting the dynamic strain ageing (DSA). It becomes positive at higher temperatures when the DSA weakening. This transition temperature increases by strain rate. The monotonic increase of the SRS brought by temperature is assumed to be due the enhancement of dynamic recovery and it appeared to be independent on strain rate, except at 300 degreesC. At 300 degreesC decreasing the strain rate brings considerable increase of the SRS. The experienced increase of the terminal m values from similar to0.15 to similar to0.4 for the applied strain-rate ratios of epsilon(1)/epsilon(2) (1:10) and epsilon(2)/epsilon(3) (10:100), respectively, is assumed to be the result of changing the deformation mechanism from recovery to diffusion-controlled solute drag. However, the performed research has shown that the attained increase of the SRS was not followed With appropriate ductility improvement. Analysis of the strain localization (necking) has shown that increasing the strain rate from 6.7 x 10(-4) to 6.7 x 10(-2) s(-1), the temperature brought softening can be compensated, and the process of strain localization (necking) shifted to higher strains.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Materials Processing Technology",
title = "The effect of temperature on strain-rate sensitivity in high strength Al-Mg alloy sheet",
pages = "198-193",
volume = "125",
doi = "10.1016/S0924-0136(02)00308-4"
}

Romhanji, E., Dudukovska, A.,& Glišić, D.. (2002). The effect of temperature on strain-rate sensitivity in high strength Al-Mg alloy sheet. in Journal of Materials Processing Technology
Elsevier Science Sa, Lausanne., 125, 193-198.
https://doi.org/10.1016/S0924-0136(02)00308-4

Romhanji E, Dudukovska A, Glišić D. The effect of temperature on strain-rate sensitivity in high strength Al-Mg alloy sheet. in Journal of Materials Processing Technology. 2002;125:193-198.
doi:10.1016/S0924-0136(02)00308-4 .

Romhanji, Endre, Dudukovska, A, Glišić, Dragomir, "The effect of temperature on strain-rate sensitivity in high strength Al-Mg alloy sheet" in Journal of Materials Processing Technology, 125 (2002):193-198,
https://doi.org/10.1016/S0924-0136(02)00308-4 . .