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Hideaki Suito - One of the best experts on this subject based on the ideXlab platform.
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effects of oxide particles and solute elements on Austenite Grain Growth in fe 0 05mass c and fe 10mass ni alloys
Isij International, 2008Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The inhibition effects of oxide particles and solute elements on Austenite Grain Growth have been studied in an Fe–0.05mass%C and Fe–10mass%Ni alloys deoxidized with Mn–Si, Ti, Mg, Zr and Ce as a function of content of soluble deoxidant elements and holding time at 1200°C. Total surface area of Austenite Grains per unit volume which is inversely proportional to Austenite Grain size is analyzed as a function of total surface area of particles per unit volume and content of soluble deoxidant elements. It is found that in Mn–Si, Ti and Mg deoxidations, the Austenite Grain size is controlled only by the effect of particle pinning, while in Zr and Ce deoxidations the Austenite Grain size is controlled by both particle pinning and solute drag. The inhibition effect of soluble Zr and Ce increases significantly with increasing their contents. The effect of particle dragging in Ce deoxidation increases with increasing the holding time at 1200°C. The contribution of particle pinning, particle dragging and solute drag to Austenite Grain Growth is estimated as a function of deoxidant elements and holding time at 1200°C.
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Effects of Oxide Particles and Solute Elements on Austenite Grain Growth in Fe–0.05mass%C and Fe–10mass%Ni Alloys
ISIJ International, 2008Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The inhibition effects of oxide particles and solute elements on Austenite Grain Growth have been studied in an Fe–0.05mass%C and Fe–10mass%Ni alloys deoxidized with Mn–Si, Ti, Mg, Zr and Ce as a function of content of soluble deoxidant elements and holding time at 1200°C. Total surface area of Austenite Grains per unit volume which is inversely proportional to Austenite Grain size is analyzed as a function of total surface area of particles per unit volume and content of soluble deoxidant elements. It is found that in Mn–Si, Ti and Mg deoxidations, the Austenite Grain size is controlled only by the effect of particle pinning, while in Zr and Ce deoxidations the Austenite Grain size is controlled by both particle pinning and solute drag. The inhibition effect of soluble Zr and Ce increases significantly with increasing their contents. The effect of particle dragging in Ce deoxidation increases with increasing the holding time at 1200°C. The contribution of particle pinning, particle dragging and solute drag to Austenite Grain Growth is estimated as a function of deoxidant elements and holding time at 1200°C.
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inhibition of Austenite Grain Growth by particles and solute elements in fe 0 05 c and fe 10 ni alloys deoxidized by mn si ti mg zr and ce
Materials Science Forum, 2007Co-Authors: Andrey Vladimirovich Karasev, Ryo Inoue, Hideaki SuitoAbstract:The inhibition effect of inclusion particles and soluble elements on the Austenite Grain Growth has been studied in Fe-0.05% C and Fe-10% Ni alloys deoxidized by Mn (1.0%) - Si (0.2%), Ti (0.05%), ...
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Inhibition of Austenite Grain Growth by Particles and Solute Elements in Fe-0.05% C and Fe-10% Ni Alloys Deoxidized by Mn-Si, Ti, Mg, Zr and Ce
Materials Science Forum, 2007Co-Authors: Andrey Vladimirovich Karasev, Ryo Inoue, Hideaki SuitoAbstract:The inhibition effect of inclusion particles and soluble elements on the Austenite Grain Growth has been studied in Fe-0.05% C and Fe-10% Ni alloys deoxidized by Mn (1.0%) - Si (0.2%), Ti (0.05%), ...
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effect of particle size distribution on Austenite Grain Growth in fe 0 05mass c alloy deoxidized with mn si ti mg zr and ce
Isij International, 2006Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The Austenite Grain Growth in an Fe–0.05mass%C alloy deoxidized with Mn–Si, Ti, Mg, Zr and Ce has been studied as a function of holding time at 1200°C and inclusion characteristics such as particle diameter, dV, number and surface area, AVP, of particles per unit volume and volume fraction of particles. The mean limiting diameters of Grains obtained by the Zener, Doherty et al. and Nishizawa et al. relations are compared with those observed experimentally and calculated by the relationship between surface area of particles, AVP, and Grains, AVG, per unit volume. The contribution of small size particles with dV<0.5 µm to limiting Grain size is estimated for the particles with uniform size, log-normal size distribution and observed size distribution.
Andrey Vladimirovich Karasev - One of the best experts on this subject based on the ideXlab platform.
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effects of oxide particles and solute elements on Austenite Grain Growth in fe 0 05mass c and fe 10mass ni alloys
Isij International, 2008Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The inhibition effects of oxide particles and solute elements on Austenite Grain Growth have been studied in an Fe–0.05mass%C and Fe–10mass%Ni alloys deoxidized with Mn–Si, Ti, Mg, Zr and Ce as a function of content of soluble deoxidant elements and holding time at 1200°C. Total surface area of Austenite Grains per unit volume which is inversely proportional to Austenite Grain size is analyzed as a function of total surface area of particles per unit volume and content of soluble deoxidant elements. It is found that in Mn–Si, Ti and Mg deoxidations, the Austenite Grain size is controlled only by the effect of particle pinning, while in Zr and Ce deoxidations the Austenite Grain size is controlled by both particle pinning and solute drag. The inhibition effect of soluble Zr and Ce increases significantly with increasing their contents. The effect of particle dragging in Ce deoxidation increases with increasing the holding time at 1200°C. The contribution of particle pinning, particle dragging and solute drag to Austenite Grain Growth is estimated as a function of deoxidant elements and holding time at 1200°C.
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Effects of Oxide Particles and Solute Elements on Austenite Grain Growth in Fe–0.05mass%C and Fe–10mass%Ni Alloys
ISIJ International, 2008Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The inhibition effects of oxide particles and solute elements on Austenite Grain Growth have been studied in an Fe–0.05mass%C and Fe–10mass%Ni alloys deoxidized with Mn–Si, Ti, Mg, Zr and Ce as a function of content of soluble deoxidant elements and holding time at 1200°C. Total surface area of Austenite Grains per unit volume which is inversely proportional to Austenite Grain size is analyzed as a function of total surface area of particles per unit volume and content of soluble deoxidant elements. It is found that in Mn–Si, Ti and Mg deoxidations, the Austenite Grain size is controlled only by the effect of particle pinning, while in Zr and Ce deoxidations the Austenite Grain size is controlled by both particle pinning and solute drag. The inhibition effect of soluble Zr and Ce increases significantly with increasing their contents. The effect of particle dragging in Ce deoxidation increases with increasing the holding time at 1200°C. The contribution of particle pinning, particle dragging and solute drag to Austenite Grain Growth is estimated as a function of deoxidant elements and holding time at 1200°C.
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inhibition of Austenite Grain Growth by particles and solute elements in fe 0 05 c and fe 10 ni alloys deoxidized by mn si ti mg zr and ce
Materials Science Forum, 2007Co-Authors: Andrey Vladimirovich Karasev, Ryo Inoue, Hideaki SuitoAbstract:The inhibition effect of inclusion particles and soluble elements on the Austenite Grain Growth has been studied in Fe-0.05% C and Fe-10% Ni alloys deoxidized by Mn (1.0%) - Si (0.2%), Ti (0.05%), ...
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Inhibition of Austenite Grain Growth by Particles and Solute Elements in Fe-0.05% C and Fe-10% Ni Alloys Deoxidized by Mn-Si, Ti, Mg, Zr and Ce
Materials Science Forum, 2007Co-Authors: Andrey Vladimirovich Karasev, Ryo Inoue, Hideaki SuitoAbstract:The inhibition effect of inclusion particles and soluble elements on the Austenite Grain Growth has been studied in Fe-0.05% C and Fe-10% Ni alloys deoxidized by Mn (1.0%) - Si (0.2%), Ti (0.05%), ...
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effect of particle size distribution on Austenite Grain Growth in fe 0 05mass c alloy deoxidized with mn si ti mg zr and ce
Isij International, 2006Co-Authors: Andrey Vladimirovich Karasev, Hideaki SuitoAbstract:The Austenite Grain Growth in an Fe–0.05mass%C alloy deoxidized with Mn–Si, Ti, Mg, Zr and Ce has been studied as a function of holding time at 1200°C and inclusion characteristics such as particle diameter, dV, number and surface area, AVP, of particles per unit volume and volume fraction of particles. The mean limiting diameters of Grains obtained by the Zener, Doherty et al. and Nishizawa et al. relations are compared with those observed experimentally and calculated by the relationship between surface area of particles, AVP, and Grains, AVG, per unit volume. The contribution of small size particles with dV<0.5 µm to limiting Grain size is estimated for the particles with uniform size, log-normal size distribution and observed size distribution.
Yazheng Liu - One of the best experts on this subject based on the ideXlab platform.
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Austenite Grain Growth and its effect on splitting fracture property of a v n microalloyed medium carbon steel connecting rod
Journal of Iron and Steel Research International, 2019Co-Authors: Chaolei Zhang, Wen Fang, Bao-run Cai, Xiao-hang Sun, Yazheng LiuAbstract:The Growth behaviour of Austenite Grain in a V–N microalloyed medium carbon steel and its effect on splitting fracture property were investigated by mechanical tests, fracture morphology and microstructure analysis. When the heating temperature is 800 °C, the Austenite Grain size is 7.6 μm, and the fracture surface is uneven with the impact energy of 235.9 J. When the heating temperature increases to 1100 °C, the Austenite Grain size grows up to 65.5 μm and the impact fracture surface is much more even with the impact energy of 13.6 J. It is believed that the coarse Austenite Grain size of 65.5 μm is beneficial for the splitting fracture property of V–N microalloyed medium carbon steel connecting rod. In addition, Austenite Grain sizes of V–N microalloyed medium carbon steel increase with the increasing in heating temperature and holding time. Then, a Grain Growth model is established to predict Austenite Grain Growth behaviour.
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Austenite Grain Growth and its effect on splitting fracture property of a V–N microalloyed medium carbon steel connecting rod
Journal of Iron and Steel Research International, 2019Co-Authors: Chaolei Zhang, Wen Fang, Bao-run Cai, Xiao-hang Sun, Yazheng LiuAbstract:The Growth behaviour of Austenite Grain in a V–N microalloyed medium carbon steel and its effect on splitting fracture property were investigated by mechanical tests, fracture morphology and microstructure analysis. When the heating temperature is 800 °C, the Austenite Grain size is 7.6 μm, and the fracture surface is uneven with the impact energy of 235.9 J. When the heating temperature increases to 1100 °C, the Austenite Grain size grows up to 65.5 μm and the impact fracture surface is much more even with the impact energy of 13.6 J. It is believed that the coarse Austenite Grain size of 65.5 μm is beneficial for the splitting fracture property of V–N microalloyed medium carbon steel connecting rod. In addition, Austenite Grain sizes of V–N microalloyed medium carbon steel increase with the increasing in heating temperature and holding time. Then, a Grain Growth model is established to predict Austenite Grain Growth behaviour.
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The Effect of Size and Distribution of MnS Inclusions on the Austenite Grain Growth in a Low Cost Hot Forged Steel
steel research international, 2017Co-Authors: Fan Zhao, Yong Yang, Bo Jiang, Chaolei Zhang, Yazheng LiuAbstract:The size and thermal stability of Manganese Sulfide (MnS) inclusions in two low cost hot forged steels with no microalloying elements are carefully investigated. Based on the results, the Austenite Grain Growth behavior of the two steels are studied and the effect of MnS inclusions on the Austenite Grain Growth are discussed using an optical microscope, a scanning electron microscopy, and a confocal scanning laser microscopy. Results show that the MnS inclusions hold a favorable thermal stability and do not dissolve in the steel heated at 1250 °C for 30 min. Austenite Grains of the steel with larger quantities of smaller size of MnS inclusions are significantly finer than that of the steel with less and larger size of MnS inclusions heated at a temperature above 1000 °C. The differences in Grain size become greater, as the heating temperature increases. The pinning effect of MnS inclusions plays an important role during Austenite Grain Growth, when the Austenite Grain size exceeds the average spacing of MnS inclusions. The results indicate that large quantities of small MnS inclusions can be used to inhibit Austenite Grain Growth during heating process in a low cost hot forged steel, where expensive microalloying elements are removed.
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Effect of Precipitates on Austenite Grain Growth Behavior in a Low-Carbon Nb-V Microalloyed Steel
Materials Science Forum, 2017Co-Authors: Li Chong Zhang, Xin Li Wen, Yazheng LiuAbstract:The effect of precipitates on Austenite Grain Growth behavior in a Nb-V microalloyed steel was investigated. The precipitates were identified by selected area electron diffraction (SAED) and energy dispersive spectrometer (EDS) analysis. Because of pinning effect of NbC and/or VC on Austenite Grain boundaries, Grains grew slowly at 850oC-1000oC. However, when temperature reached 1050 oC, abnormal Grain Growth was observed, which was attributed to dissolution of NbC particles. The NbC precipitates dissolved significantly at 1150 oC. However, Grain sizes were still very small. Thus, Austenite Grains grew rapidly at 1050-1150 oC. The fully dissolution temperature of this steel was 1150-1250oC. Finally, the relationship between Grain coarsening temperature (TGC) and fully dissolution temperature (TDISS) could be illustrated as follows: 100 oC≤TDISS -TGC≤200 oC. When heating temperatures were 850-1050 oC and 1050-1250 oC, Grain Growth activation energies (Q) were 59945 J/mol and 135813 J/mol, respectively. The different Grain Growth models were mainly caused by the gradual dissolution of NbC particles.
Zhengliang Xue - One of the best experts on this subject based on the ideXlab platform.
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dynamic observation of twin evolution during Austenite Grain Growth in an fe c mn si alloy
International Journal of Materials Research, 2014Co-Authors: Feng Liu, Li Wang, Lixin Zhou, Zhengliang XueAbstract:Abstract For the first time, investigation of twin evolution during Austenite Grain Growth in an Fe–C–Mn–Si alloy was conducted with in-situ observation using high temperature laser scanning confoc...
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Dynamic observation of twin evolution during Austenite Grain Growth in an Fe–C–Mn–Si alloy
International Journal of Materials Research, 2014Co-Authors: Hu Haijiang, Feng Liu, Li Wang, Lixin Zhou, Zhengliang XueAbstract:Abstract For the first time, investigation of twin evolution during Austenite Grain Growth in an Fe–C–Mn–Si alloy was conducted with in-situ observation using high temperature laser scanning confoc...
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In situ observations of Austenite Grain Growth in Fe-C-Mn-Si super bainitic steel
International Journal of Minerals Metallurgy and Materials, 2013Co-Authors: Feng Liu, Yulong Zhang, Hu Haijiang, Lin-xin Zhou, Zhengliang XueAbstract:In situ observations of Austenite Grain Growth in Fe-C-Mn-Si super bainitic steel were conducted on a high-temperature laser scanning confocal microscope during continuous heating and subsequent isothermal holding at 850, 1000, and 1100°C for 30 min. A Grain Growth model was proposed based on experimental results. It is indicated that the Austenite Grain size increases with austenitizing temperature and holding time. When the austenitizing temperature is above 1100°C, the Austenite Grains grow rapidly, and abnormal Austenite Grains occur. In addition, the effect of heating rate on Austenite Grain Growth was investigated, and the relation between Austenite Grains and bainite morphology after bainitic transformations was also discussed.
Christian Bernhard - One of the best experts on this subject based on the ideXlab platform.
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In-situ Observation of Austenite Grain Growth in Plain Carbon Steels by Means of High-temperature Laser Scanning Confocal Microscopy
BHM Berg- und Hüttenmännische Monatshefte, 2015Co-Authors: Nora Fuchs, Pawel Krajewski, Christian BernhardAbstract:Das Wachstum und die Größe von Austenitkörnern sind wesentliche Parameter für Gieß-, Walz und Wärmebehandlungsprozesse. Die Hochtemperatur–Laser-Scanning-Konfokal-Mikroskopie ist eine effektive Methode zur Beobachtung des Kornwachstums. Die vorliegende Veröffentlichung beschreibt den Versuchsaufbau, die Auswertemethoden und abschließend die Ergebnisse für isotherme Halteversuche an drei Kohlenstoffstählen bei 950, 1050, 1150 und 1250 °C. Austenite Grain Growth and Austenite Grain size play an important role for casting, rolling, and annealing processes. High-temperature laser scanning confocal microscopy (HT-LSCM) is an effective method to directly observe Austenite Grain Growth. The present paper describes the experimental setup and the Grain size analysis. Finally, results for the isothermal annealing of three different plain carbon steels at 950, 1050, 1150, and 1250 °C are briefly discussed.
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In-situ Observation of Austenite Grain Growth in Plain Carbon Steels by Means of High-Temperature Laser Scanning Confocal Microscopy
BHM Berg- und Hüttenmännische Monatshefte, 2015Co-Authors: Nora Fuchs, Pawel Krajewski, Christian BernhardAbstract:Austenite Grain Growth and Austenite Grain size play an important role for casting, rolling, and annealing processes. High-temperature laser scanning confocal microscopy (HT-LSCM) is an effective method to directly observe Austenite Grain Growth. The present paper describes the experimental setup and the Grain size analysis. Finally, results for the isothermal annealing of three different plain carbon steels at 950, 1050, 1150, and 1250 °C are briefly discussed.
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Austenite Grain Growth and the surface quality of continuously cast steel
Metallurgical and Materials Transactions B, 2013Co-Authors: Rian J Dippenaar, Christian Bernhard, Siegfried Schider, Gerhard WieserAbstract:Austenite Grain Growth does not only play an important role in determining the mechanical properties of steel, but certain surface defects encountered in the continuous casting industry have also been attributed to the formation of large Austenite Grains. Earlier research has seen innovative experimentation, the development of metallographic techniques to determine Austenite Grain size and the building of mathematical models to simulate the conditions pertaining to Austenite Grain Growth during the continuous casting of steel. Oscillation marks and depressions in the meniscus region of the continuously casting mold lead to retarded cooling of the strand surface, which in turn results in the formation of coarse Austenite Grains, but little is known about the mechanism and rate of formation of these large Austenite Grains. Relevant earlier research will be briefly reviewed to put into context our recent in situ observations of the delta-ferrite to Austenite phase transition. We have confirmed earlier evidence that very large delta-ferrite Grains are formed very quickly in the single-phase region and that these large delta-ferrite Grains are transformed to large Austenite Grains at low cooling rates. At the higher cooling rates relevant to the early stages of the solidification of steel in a continuously cast mold, delta-ferrite transforms to Austenite by an apparently massive type of transformation mechanism. Large Austenite Grains then form very quickly from this massive type of microstructure and on further cooling, Austenite transforms to thin ferrite allotriomorphs on Austenite Grain boundaries, followed by Widmanstatten plate Growth, with almost no regard to the cooling rate. This observation is important because it is now well established that the presence of a thin ferrite film on Austenite Grain boundaries is the main cause of reduction in hot ductility. Moreover, this reduction in ductility is exacerbated by the presence of large Austenite Grains.
