TY  - JOUR
AU  - Aranđelović, Mihajlo
AU  - Đorđević, Branislav
AU  - Sedmak, Simon
AU  - Radu, Dorin
AU  - Petrović, Ana
AU  - Dikić, Stefan
AU  - Sedmak, Aleksandar
PY  - 2024-06
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7360
AB  - Failure analysis of welded joint with multiple defects was performed taking into account the effect of all defects, not just a dominant one. Four cases of multiple defects in welded joint under the uniaxial tensile loading were investigated using extended Finite Element Method. Two-dimensional Finite Element Models were made according to the tensile specimens with initial crack located in a critical area of welded joint. For each multiple defects case, numerical simulation was performed with three initial crack depth. Engineering Critical Analysis was made using Failure Assessment Diagrams for each defect that was determined as critical for its welded joint case. Numerical simulation showed that the geometry of the most prominent one from a point of view of structural integrity. It was concluded that the vertical misalignment in combination with a secondary defect, had the most adverse effect which can lead to failure of welded structure.
PB  - Elsevier Ltd.
T2  - Engineering Failure Analysis
T1  - Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis
SP  - 108176
VL  - 160
DO  - 10.1016/j.engfailanal.2024.108176
ER  - 

@article{
author = "Aranđelović, Mihajlo and Đorđević, Branislav and Sedmak, Simon and Radu, Dorin and Petrović, Ana and Dikić, Stefan and Sedmak, Aleksandar",
year = "2024-06",
abstract = "Failure analysis of welded joint with multiple defects was performed taking into account the effect of all defects, not just a dominant one. Four cases of multiple defects in welded joint under the uniaxial tensile loading were investigated using extended Finite Element Method. Two-dimensional Finite Element Models were made according to the tensile specimens with initial crack located in a critical area of welded joint. For each multiple defects case, numerical simulation was performed with three initial crack depth. Engineering Critical Analysis was made using Failure Assessment Diagrams for each defect that was determined as critical for its welded joint case. Numerical simulation showed that the geometry of the most prominent one from a point of view of structural integrity. It was concluded that the vertical misalignment in combination with a secondary defect, had the most adverse effect which can lead to failure of welded structure.",
publisher = "Elsevier Ltd.",
journal = "Engineering Failure Analysis",
title = "Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis",
pages = "108176",
volume = "160",
doi = "10.1016/j.engfailanal.2024.108176"
}

Aranđelović, M., Đorđević, B., Sedmak, S., Radu, D., Petrović, A., Dikić, S.,& Sedmak, A.. (2024-06). Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis. in Engineering Failure Analysis
Elsevier Ltd.., 160, 108176.
https://doi.org/10.1016/j.engfailanal.2024.108176

Aranđelović M, Đorđević B, Sedmak S, Radu D, Petrović A, Dikić S, Sedmak A. Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis. in Engineering Failure Analysis. 2024;160:108176.
doi:10.1016/j.engfailanal.2024.108176 .

Aranđelović, Mihajlo, Đorđević, Branislav, Sedmak, Simon, Radu, Dorin, Petrović, Ana, Dikić, Stefan, Sedmak, Aleksandar, "Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis" in Engineering Failure Analysis, 160 (2024-06):108176,
https://doi.org/10.1016/j.engfailanal.2024.108176 . .

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  - CONF
AU  - Dikić, Stefan
AU  - Aranđelović, Mihajlo
AU  - Sedmak, Simon
AU  - Petrović, Ana
AU  - Đorđevic, Branislav
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6627
AB  - This paper is based on extensive research about the influence of multiple different welded joint defects on the integrity of welded structures. In this particular case, the focus was on the heat affected zone and its different sub regions - up to this point, it was observed as a whole, with homogeneous mechanical properties along its cross-section. Due to the need to describe its behaviour in more detail, it was concluded that metallographic characterisation of the heat affected zone is necessary. Metallographic tests have provided a detailed insight into the micro-structures with the heat affected zone, which would be difficult to predict in this case, due to specific conditions, i.e., a welding technology which was adopted with the purpose of deliberately causing a number of defects in the welded joint. This would result in a more realistic distribution of mechanical properties along the heat affected zone, which in turn would provide more accurate input data for numerical simulations, since the use of finite element method will be the next step in this research.
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Metallographic characterization of the heat affected zone in welded joints with multiple defects
EP  - 265
SP  - 260
VL  - 48
DO  - 10.1016/j.prostr.2023.07.134
ER  - 

@conference{
author = "Dikić, Stefan and Aranđelović, Mihajlo and Sedmak, Simon and Petrović, Ana and Đorđevic, Branislav",
year = "2023",
abstract = "This paper is based on extensive research about the influence of multiple different welded joint defects on the integrity of welded structures. In this particular case, the focus was on the heat affected zone and its different sub regions - up to this point, it was observed as a whole, with homogeneous mechanical properties along its cross-section. Due to the need to describe its behaviour in more detail, it was concluded that metallographic characterisation of the heat affected zone is necessary. Metallographic tests have provided a detailed insight into the micro-structures with the heat affected zone, which would be difficult to predict in this case, due to specific conditions, i.e., a welding technology which was adopted with the purpose of deliberately causing a number of defects in the welded joint. This would result in a more realistic distribution of mechanical properties along the heat affected zone, which in turn would provide more accurate input data for numerical simulations, since the use of finite element method will be the next step in this research.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Metallographic characterization of the heat affected zone in welded joints with multiple defects",
pages = "265-260",
volume = "48",
doi = "10.1016/j.prostr.2023.07.134"
}

Dikić, S., Aranđelović, M., Sedmak, S., Petrović, A.,& Đorđevic, B.. (2023). Metallographic characterization of the heat affected zone in welded joints with multiple defects. in Procedia Structural Integrity
Elsevier B.V.., 48, 260-265.
https://doi.org/10.1016/j.prostr.2023.07.134

Dikić S, Aranđelović M, Sedmak S, Petrović A, Đorđevic B. Metallographic characterization of the heat affected zone in welded joints with multiple defects. in Procedia Structural Integrity. 2023;48:260-265.
doi:10.1016/j.prostr.2023.07.134 .

Dikić, Stefan, Aranđelović, Mihajlo, Sedmak, Simon, Petrović, Ana, Đorđevic, Branislav, "Metallographic characterization of the heat affected zone in welded joints with multiple defects" in Procedia Structural Integrity, 48 (2023):260-265,
https://doi.org/10.1016/j.prostr.2023.07.134 . .

TY  - JOUR
AU  - Elayeb, Abdelnaser A.
AU  - Janković, Milan
AU  - Dikić, Stefan
AU  - Bekrić, Dragoljub
AU  - Balać, Igor
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6595
AB  - Tensile properties of thin plate specimens made from short carbon fiberreinforced PET-G material are experimentally evaluated for various raster angles(printing directions). In additive manufacturing (AM), raster angle is recognized as one of the key printing parameters which strongly influences the strength and stiffness of thefinal part. The relatively high average value of ultimate tensile strength was obtained for specimens printed with the 0° raster angle, compared to the value obtained for specimens printed with the 90° raster angle - 52.2 MPa and 25.4 MPa, respectively. Similarly, noticeably higher average value of modulus of elasticity was obtained for specimens printed with the 0° raster angle, compared to the value obtained for specimens printed with the 90° raster angle - 4752 MPa and 1569 MPa, respectively. Scanning electron microscopy (SEM) was used for analysis of specimens’ fracture surfaces. SEM images revealed considerable volume fraction of voids (porosity). Тhe porosity, together with weak bonding between two adjacent rasters, could be one of key factors for poor tensile properties of samples printed with rasters perpendicular to direction of load application (90° raster angle)
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - Influence of Raster Angle on Tensile Properties of FDM Additively Manufactured Plates made from Carbon Reinforced PET-G Material
EP  - 268
SP  - 259
VL  - 55
DO  - 10.2298/SOS220916010E
ER  - 

@article{
author = "Elayeb, Abdelnaser A. and Janković, Milan and Dikić, Stefan and Bekrić, Dragoljub and Balać, Igor",
year = "2023",
abstract = "Tensile properties of thin plate specimens made from short carbon fiberreinforced PET-G material are experimentally evaluated for various raster angles(printing directions). In additive manufacturing (AM), raster angle is recognized as one of the key printing parameters which strongly influences the strength and stiffness of thefinal part. The relatively high average value of ultimate tensile strength was obtained for specimens printed with the 0° raster angle, compared to the value obtained for specimens printed with the 90° raster angle - 52.2 MPa and 25.4 MPa, respectively. Similarly, noticeably higher average value of modulus of elasticity was obtained for specimens printed with the 0° raster angle, compared to the value obtained for specimens printed with the 90° raster angle - 4752 MPa and 1569 MPa, respectively. Scanning electron microscopy (SEM) was used for analysis of specimens’ fracture surfaces. SEM images revealed considerable volume fraction of voids (porosity). Тhe porosity, together with weak bonding between two adjacent rasters, could be one of key factors for poor tensile properties of samples printed with rasters perpendicular to direction of load application (90° raster angle)",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "Influence of Raster Angle on Tensile Properties of FDM Additively Manufactured Plates made from Carbon Reinforced PET-G Material",
pages = "268-259",
volume = "55",
doi = "10.2298/SOS220916010E"
}

Elayeb, A. A., Janković, M., Dikić, S., Bekrić, D.,& Balać, I.. (2023). Influence of Raster Angle on Tensile Properties of FDM Additively Manufactured Plates made from Carbon Reinforced PET-G Material. in Science of Sintering
Belgrade : Association for ETRAN Society., 55, 259-268.
https://doi.org/10.2298/SOS220916010E

Elayeb AA, Janković M, Dikić S, Bekrić D, Balać I. Influence of Raster Angle on Tensile Properties of FDM Additively Manufactured Plates made from Carbon Reinforced PET-G Material. in Science of Sintering. 2023;55:259-268.
doi:10.2298/SOS220916010E .

Elayeb, Abdelnaser A., Janković, Milan, Dikić, Stefan, Bekrić, Dragoljub, Balać, Igor, "Influence of Raster Angle on Tensile Properties of FDM Additively Manufactured Plates made from Carbon Reinforced PET-G Material" in Science of Sintering, 55 (2023):259-268,
https://doi.org/10.2298/SOS220916010E . .

TY  - JOUR
AU  - Aranđelović, Mihajlo
AU  - Petrović, Ana
AU  - Đorđević, Branislav
AU  - Sedmak, Simon
AU  - Sedmak, Aleksandar
AU  - Dikić, Stefan
AU  - Radu, Dorin
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5601
AB  - The research represents the ongoing investigation of the welded joints behavior made of low-carbon low-alloyed steel in the presence of different multiple defects. Following the initial experimental and numerical analyses performed on low-grade steel, a set of experiments were performed with specimens made of steel EN 1.0044 (commercial designation S275JR), along with development of new numerical models. Four combinations were made, including defects like undercuts, excess weld metal, misalignment, weld face sagging and incomplete root penetration, considering that these defects are often encountered in practice, and can appear simultaneously. The finite element method (FEM) was used to simulate the experiments. Tensile properties of the HAZ and weld metal were calculated using strain measurements by the digital image correlation (DIC) method. The finite element method (FEM) results were in good agreement with the experimental ones.
PB  - MDPI
T2  - Sustainability
T1  - Effects of Multiple Defects on Welded Joint Behaviour under the Uniaxial Tensile Loading: Fem and Experimental Approach
IS  - 1
SP  - 761
VL  - 15
DO  - 10.3390/su15010761
ER  - 

@article{
author = "Aranđelović, Mihajlo and Petrović, Ana and Đorđević, Branislav and Sedmak, Simon and Sedmak, Aleksandar and Dikić, Stefan and Radu, Dorin",
year = "2023",
abstract = "The research represents the ongoing investigation of the welded joints behavior made of low-carbon low-alloyed steel in the presence of different multiple defects. Following the initial experimental and numerical analyses performed on low-grade steel, a set of experiments were performed with specimens made of steel EN 1.0044 (commercial designation S275JR), along with development of new numerical models. Four combinations were made, including defects like undercuts, excess weld metal, misalignment, weld face sagging and incomplete root penetration, considering that these defects are often encountered in practice, and can appear simultaneously. The finite element method (FEM) was used to simulate the experiments. Tensile properties of the HAZ and weld metal were calculated using strain measurements by the digital image correlation (DIC) method. The finite element method (FEM) results were in good agreement with the experimental ones.",
publisher = "MDPI",
journal = "Sustainability",
title = "Effects of Multiple Defects on Welded Joint Behaviour under the Uniaxial Tensile Loading: Fem and Experimental Approach",
number = "1",
pages = "761",
volume = "15",
doi = "10.3390/su15010761"
}

Aranđelović, M., Petrović, A., Đorđević, B., Sedmak, S., Sedmak, A., Dikić, S.,& Radu, D.. (2023). Effects of Multiple Defects on Welded Joint Behaviour under the Uniaxial Tensile Loading: Fem and Experimental Approach. in Sustainability
MDPI., 15(1), 761.
https://doi.org/10.3390/su15010761

Aranđelović M, Petrović A, Đorđević B, Sedmak S, Sedmak A, Dikić S, Radu D. Effects of Multiple Defects on Welded Joint Behaviour under the Uniaxial Tensile Loading: Fem and Experimental Approach. in Sustainability. 2023;15(1):761.
doi:10.3390/su15010761 .

Aranđelović, Mihajlo, Petrović, Ana, Đorđević, Branislav, Sedmak, Simon, Sedmak, Aleksandar, Dikić, Stefan, Radu, Dorin, "Effects of Multiple Defects on Welded Joint Behaviour under the Uniaxial Tensile Loading: Fem and Experimental Approach" in Sustainability, 15, no. 1 (2023):761,
https://doi.org/10.3390/su15010761 . .

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  - CONF
AU  - Aranđelović, Mihajlo
AU  - Sedmak, Simon
AU  - Jovičić, Radomir
AU  - Petrović, Ana
AU  - Dikić, Stefan
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6422
AB  - This paper presents the continued efforts in investigating behaviour of low-alloyed low-carbon steel welded joints in the presence of different combinations of multiple welding defects, (undercuts, incomplete root penetration, misalignments). Since these defect combinations can greatly affect the integrity of welded joints, due to significant changes in geometry which are induced by their presence. For this reason, a total of 8 numerical models were made, including four different defect combinations (2 models for each group). This number of models was equal to the number of actual test specimens that were used for tensile test experiments, which also provided the necessary input data (mechanical properties) for each model. The goal was to determine if the two models from each group were sufficiently similar to each other, so that in the future research, they could be replaced by a single, unified model for each defect combination. Comparison was made in terms of stress and strain distribution, and it was determined that three out of four models have nearly identical values, whereas the first group specimens had shown slightly bigger differences, which were still acceptable. Thus, it was concluded that a single representative model could be made for each defect combination group.
C3  - ECF23, European Conference on Fracture 2022, Procedia Structural Integrity
T1  - Optimisation of numerical models of welded joints with multiple defect combinations
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6017
ER  - 

@conference{
author = "Aranđelović, Mihajlo and Sedmak, Simon and Jovičić, Radomir and Petrović, Ana and Dikić, Stefan",
year = "2022",
abstract = "This paper presents the continued efforts in investigating behaviour of low-alloyed low-carbon steel welded joints in the presence of different combinations of multiple welding defects, (undercuts, incomplete root penetration, misalignments). Since these defect combinations can greatly affect the integrity of welded joints, due to significant changes in geometry which are induced by their presence. For this reason, a total of 8 numerical models were made, including four different defect combinations (2 models for each group). This number of models was equal to the number of actual test specimens that were used for tensile test experiments, which also provided the necessary input data (mechanical properties) for each model. The goal was to determine if the two models from each group were sufficiently similar to each other, so that in the future research, they could be replaced by a single, unified model for each defect combination. Comparison was made in terms of stress and strain distribution, and it was determined that three out of four models have nearly identical values, whereas the first group specimens had shown slightly bigger differences, which were still acceptable. Thus, it was concluded that a single representative model could be made for each defect combination group.",
journal = "ECF23, European Conference on Fracture 2022, Procedia Structural Integrity",
title = "Optimisation of numerical models of welded joints with multiple defect combinations",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6017"
}

Aranđelović, M., Sedmak, S., Jovičić, R., Petrović, A.,& Dikić, S.. (2022). Optimisation of numerical models of welded joints with multiple defect combinations. in ECF23, European Conference on Fracture 2022, Procedia Structural Integrity.
https://hdl.handle.net/21.15107/rcub_machinery_6017

Aranđelović M, Sedmak S, Jovičić R, Petrović A, Dikić S. Optimisation of numerical models of welded joints with multiple defect combinations. in ECF23, European Conference on Fracture 2022, Procedia Structural Integrity. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_6017 .

Aranđelović, Mihajlo, Sedmak, Simon, Jovičić, Radomir, Petrović, Ana, Dikić, Stefan, "Optimisation of numerical models of welded joints with multiple defect combinations" in ECF23, European Conference on Fracture 2022, Procedia Structural Integrity (2022),
https://hdl.handle.net/21.15107/rcub_machinery_6017 .

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  - Jelić, Aleksandra
AU  - Božić, A.
AU  - Stamenović, Marina
AU  - Sekulić, Milica
AU  - Porobić, Slavica
AU  - Dikić, Stefan
AU  - Putić, Slaviša
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4587
AB  - Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve its mechanical properties and thermal stability. However, heterogeneous size, surface charge and surface hydrogen bond formation, result in aggregation of HNTs in epoxies to a certain extent. Three specific techniques were used to integrate HNTs into neat epoxy resin (NE). The structure and morphology of the embedded nanotubes were confirmed by Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Tensile testing was carried out and the fractured surface of the tested specimen was analysed using scanning electron microscopy (SEM). The thermal stability of the prepared nanocomposite materials was investigated by thermogravimetric (TG) and derivative thermogravimetry (DTG) studies. The obtained results indicated that improved properties of HNTs/epoxy nanocomposite materials were related to the unique properties of well-dispersed HNTs, agglomerate scale, and reduced void presence, and could be controlled by the manufacturing processes.
PB  - International Conference on New Technologies, Development and Application, NT 2020
T2  - Lecture Notes in Networks and Systems
T1  - Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials
EP  - 325
SP  - 310
VL  - 153
DO  - 10.1007/978-3-030-58362-0_18
ER  - 

@article{
author = "Jelić, Aleksandra and Božić, A. and Stamenović, Marina and Sekulić, Milica and Porobić, Slavica and Dikić, Stefan and Putić, Slaviša",
year = "2021",
abstract = "Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve its mechanical properties and thermal stability. However, heterogeneous size, surface charge and surface hydrogen bond formation, result in aggregation of HNTs in epoxies to a certain extent. Three specific techniques were used to integrate HNTs into neat epoxy resin (NE). The structure and morphology of the embedded nanotubes were confirmed by Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Tensile testing was carried out and the fractured surface of the tested specimen was analysed using scanning electron microscopy (SEM). The thermal stability of the prepared nanocomposite materials was investigated by thermogravimetric (TG) and derivative thermogravimetry (DTG) studies. The obtained results indicated that improved properties of HNTs/epoxy nanocomposite materials were related to the unique properties of well-dispersed HNTs, agglomerate scale, and reduced void presence, and could be controlled by the manufacturing processes.",
publisher = "International Conference on New Technologies, Development and Application, NT 2020",
journal = "Lecture Notes in Networks and Systems",
title = "Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials",
pages = "325-310",
volume = "153",
doi = "10.1007/978-3-030-58362-0_18"
}

Jelić, A., Božić, A., Stamenović, M., Sekulić, M., Porobić, S., Dikić, S.,& Putić, S.. (2021). Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials. in Lecture Notes in Networks and Systems
International Conference on New Technologies, Development and Application, NT 2020., 153, 310-325.
https://doi.org/10.1007/978-3-030-58362-0_18

Jelić A, Božić A, Stamenović M, Sekulić M, Porobić S, Dikić S, Putić S. Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials. in Lecture Notes in Networks and Systems. 2021;153:310-325.
doi:10.1007/978-3-030-58362-0_18 .

Jelić, Aleksandra, Božić, A., Stamenović, Marina, Sekulić, Milica, Porobić, Slavica, Dikić, Stefan, Putić, Slaviša, "Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials" in Lecture Notes in Networks and Systems, 153 (2021):310-325,
https://doi.org/10.1007/978-3-030-58362-0_18 . .

TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Marinković, Aleksandar
AU  - Sekulic, Milica
AU  - Dikić, Stefan
AU  - Ugrinović, Vukašin
AU  - Pavlović, Vladimir
AU  - Putić, Slaviša
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4961
AB  - In this study, halloysite nanotubes (HNT) were modified by: 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltrimethoxysilane (APTES), and 2,2-Bis[4-(glycidyloxy) phenyl] propane (DGEBA), and incorporated in the epoxy resin matrix to enhance its mechanical properties. The HNT/epoxy nanocomposite materials were prepared by mixing different ratios of untreated/treated HNT with neat epoxy resin. Characterization of untreated/treated HNT was performed by Fourier-transformation infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The quantity of grafted molecules and thermal stability of newly synthesized materials were determined by thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis. Tensile properties of newly synthesized materials were compared, and scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis of the fracture surfaces were performed. Incorporation of APTES modified HNT (HNTAPT) and two-step modification APTES followed by DGEBA (HNTAPTDG) has increased the tensile strength of the nanocomposite materials up to 72% and 61%, and strain at break up to 1082% and 1216%, respectively, compared to neat epoxy. It was concluded that the modification of HNT contributed to the enhancement of the dispersion and the cross-linking in the epoxy resin matrix.
T2  - Polymer Composites
T1  - Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites
EP  - 2192
IS  - 5
SP  - 2180
VL  - 42
DO  - 10.1002/pc.25967
ER  - 

@article{
author = "Jelić, Aleksandra and Marinković, Aleksandar and Sekulic, Milica and Dikić, Stefan and Ugrinović, Vukašin and Pavlović, Vladimir and Putić, Slaviša",
year = "2021",
abstract = "In this study, halloysite nanotubes (HNT) were modified by: 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltrimethoxysilane (APTES), and 2,2-Bis[4-(glycidyloxy) phenyl] propane (DGEBA), and incorporated in the epoxy resin matrix to enhance its mechanical properties. The HNT/epoxy nanocomposite materials were prepared by mixing different ratios of untreated/treated HNT with neat epoxy resin. Characterization of untreated/treated HNT was performed by Fourier-transformation infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The quantity of grafted molecules and thermal stability of newly synthesized materials were determined by thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis. Tensile properties of newly synthesized materials were compared, and scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis of the fracture surfaces were performed. Incorporation of APTES modified HNT (HNTAPT) and two-step modification APTES followed by DGEBA (HNTAPTDG) has increased the tensile strength of the nanocomposite materials up to 72% and 61%, and strain at break up to 1082% and 1216%, respectively, compared to neat epoxy. It was concluded that the modification of HNT contributed to the enhancement of the dispersion and the cross-linking in the epoxy resin matrix.",
journal = "Polymer Composites",
title = "Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites",
pages = "2192-2180",
number = "5",
volume = "42",
doi = "10.1002/pc.25967"
}

Jelić, A., Marinković, A., Sekulic, M., Dikić, S., Ugrinović, V., Pavlović, V.,& Putić, S.. (2021). Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites. in Polymer Composites, 42(5), 2180-2192.
https://doi.org/10.1002/pc.25967

Jelić A, Marinković A, Sekulic M, Dikić S, Ugrinović V, Pavlović V, Putić S. Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites. in Polymer Composites. 2021;42(5):2180-2192.
doi:10.1002/pc.25967 .

Jelić, Aleksandra, Marinković, Aleksandar, Sekulic, Milica, Dikić, Stefan, Ugrinović, Vukašin, Pavlović, Vladimir, Putić, Slaviša, "Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites" in Polymer Composites, 42, no. 5 (2021):2180-2192,
https://doi.org/10.1002/pc.25967 . .

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 . .

Gligorijević, B. R., Milašinović, V. D., Milašinović, M., Milašinović, N., Jevremović, A., Raić, K., Alil, A., Dikić, S., Vlahović, M.,& Martinović, S.. (2019). Poboljšanje elektro-mehaničkih svojstava Al/Cu električnih konektora smanjenjem intermetalnog sloja postupkom redukovanja vremena zavarivanja trenjem. in Tehnološko-metalurški fakultet
Tehnološko-metalurški fakultet., 1-13.
https://hdl.handle.net/21.15107/rcub_technorep_6236

Gligorijević BR, Milašinović VD, Milašinović M, Milašinović N, Jevremović A, Raić K, Alil A, Dikić S, Vlahović M, Martinović S. Poboljšanje elektro-mehaničkih svojstava Al/Cu električnih konektora smanjenjem intermetalnog sloja postupkom redukovanja vremena zavarivanja trenjem. in Tehnološko-metalurški fakultet. 2019;:1-13.
https://hdl.handle.net/21.15107/rcub_technorep_6236 .

Gligorijević, Bojan R., Milašinović, Veljko D., Milašinović, Mijat, Milašinović, Nikola, Jevremović, Aleksandar, Raić, Karlo, Alil, Ana, Dikić, Stefan, Vlahović, Milica, Martinović, Sanja, "Poboljšanje elektro-mehaničkih svojstava Al/Cu električnih konektora smanjenjem intermetalnog sloja postupkom redukovanja vremena zavarivanja trenjem" in Tehnološko-metalurški fakultet (2019):1-13,
https://hdl.handle.net/21.15107/rcub_technorep_6236 .

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 . .