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  - 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  - 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  - 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  - 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 . .