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Mechanism of Dynamic Formation of Ultrafine Ferrite Grains during High Temperature Processing in Steel
Zhao, Lijia; Park, Nokeun; Tian, Yanzhong; Shibata, Akinobu; Tsuji, Nobuhiro; Zhao, LJ (reprint author), Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan.; Zhao, LJ (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA.
2017-03-01
Source PublicationADVANCED ENGINEERING MATERIALS
ISSN1438-1656
Volume19Issue:3Pages:-
AbstractThe grain refinement mechanism of ferrite dynamically transformed (DT) from austenite is investigated in a 10Ni-0.1C steel. For decades, it has been debated whether dynamic recrystallization (DRX) contributes to the grain refinement of DT ferrite. Here, the authors show that the role of DRX has been previously underestimated in grain refinement of ferrite and intrinsically it is the DRX that leads to ultra grain refinement of DT ferrite. The DT ferrite shows an unconventional grain growth behavior, that is, grain coarsening at an early stage of transformation with subsequent grain refinement by DRX, which strongly depends on the strain rate. The high strain concentration on fine ferrite grains within the austenite+ferrite structure produced by DT mainly contributes to the occurrence of DRX to form ultrafine-grained ferrite structures.; The grain refinement mechanism of ferrite dynamically transformed (DT) from austenite is investigated in a 10Ni-0.1C steel. For decades, it has been debated whether dynamic recrystallization (DRX) contributes to the grain refinement of DT ferrite. Here, the authors show that the role of DRX has been previously underestimated in grain refinement of ferrite and intrinsically it is the DRX that leads to ultra grain refinement of DT ferrite. The DT ferrite shows an unconventional grain growth behavior, that is, grain coarsening at an early stage of transformation with subsequent grain refinement by DRX, which strongly depends on the strain rate. The high strain concentration on fine ferrite grains within the austenite+ferrite structure produced by DT mainly contributes to the occurrence of DRX to form ultrafine-grained ferrite structures.
description.department[zhao, lijia ; park, nokeun ; tian, yanzhong ; shibata, akinobu ; tsuji, nobuhiro] kyoto univ, dept mat sci & engn, sakyo ku, yoshida honmachi, kyoto 6068501, japan ; [zhao, lijia] colorado sch mines, dept met & mat engn, adv steel proc & prod res ctr, golden, co 80401 usa ; [park, nokeun] yeungnam univ, sch mat sci & engn, gyongsan 712749, south korea ; [tian, yanzhong] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [tian, yanzhong ; shibata, akinobu ; tsuji, nobuhiro] kyoto univ, elements strategy initiat struct mat esism, sakyo ku, yoshida honmachi, kyoto 6068501, japan
Subject AreaMaterials Science, Multidisciplinary
Funding OrganizationElements Strategy Initiative for Structural Materials (ESISM), all through the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [15H05767, 26630365]; China Scholarship Council [2011608007]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78251
Collection中国科学院金属研究所
Corresponding AuthorZhao, LJ (reprint author), Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan.; Zhao, LJ (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA.
Recommended Citation
GB/T 7714
Zhao, Lijia,Park, Nokeun,Tian, Yanzhong,et al. Mechanism of Dynamic Formation of Ultrafine Ferrite Grains during High Temperature Processing in Steel[J]. ADVANCED ENGINEERING MATERIALS,2017,19(3):-.
APA Zhao, Lijia.,Park, Nokeun.,Tian, Yanzhong.,Shibata, Akinobu.,Tsuji, Nobuhiro.,...&Zhao, LJ .(2017).Mechanism of Dynamic Formation of Ultrafine Ferrite Grains during High Temperature Processing in Steel.ADVANCED ENGINEERING MATERIALS,19(3),-.
MLA Zhao, Lijia,et al."Mechanism of Dynamic Formation of Ultrafine Ferrite Grains during High Temperature Processing in Steel".ADVANCED ENGINEERING MATERIALS 19.3(2017):-.
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