Acta Metall Sin  2005, Vol. 41 Issue (6): 605-610     DOI:

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Kinetics of Structure Evolution During Deformation Enhanced Transformation in a Low Carbon Steel SS400

QI Junjie; YANG Wangyue; SUN Zuqing; ZHANG Xiaozhong; DONG Zhifeng

Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; Department of Materials Science & Engineering; University of Science & Technology Beijing; Beijing 100083

QI Junjie; YANG Wangyue; SUN Zuqing; ZHANG Xiaozhong; DONG Zhifeng. Kinetics of Structure Evolution During Deformation Enhanced Transformation in a Low Carbon Steel SS400. Acta Metall Sin, 2005, 41(6): 605-610 .

Abstract References Related Articles Recommended Metrics Download:  PDF(234KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Quantitative characterization of microstructural evolution during deformation enhanced transformation in a low carbon steel SS400 was investigated on a Gleeble 1500 machine. General conclusions of the austenite transformation kinetics were formulated. It was shown that the transformation process can be divided into three stages according to the characteristics of transformation kinetics: The kinetics equations of two early stages fitted well in with the J-M-A equation. The kinetics of the first stage obeys Cahn's site saturation mechanism, the kinetics parameter n=4 which indicates the ferrite nucleates at austenite grain boundaries and triple points. Kinetics of the second stage doesn't obey Cahn's theory, the kinetics parameter n=1.0-1.5, corresponding to ferrite nucleating repeatedly at the high stored energy areas in front of the ferrite/austenite interface. The kinetics doesn't obey the J-M-A equation anymore in the final stage, and only few nucleation sites left at this moment. Deformation promotes the growth of ferrite grains, the growing rate of ferrite in the early stage of DEFT was calculated. Key words:  low carbon steel      deformation enhanced transformation      kinetics       Received:  09 October 2004      ZTFLH:  TG142     O7   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors QI Junjie YANG Wangyue SUN Zuqing ZHANG Xiaozhong DONG Zhifeng URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I6/605 [1]Mintz B,Abu-Shosha R,Shaker M.Mater Sci Technol,1993;9:907 [2]Mintz B,Lewis H,Jonas J J.Mater Sci Technol,1997;13:379 [3]Hurley P J,Hodgson P D,Muddle B C.Scr Mater,1999;40:433 [4]Hurley P J,Hodgson P D.Mater Sci Eng,2001;A302:206 [5]Hickson M R,Hurley P J,Gibbs R K,Kelly G L,Hodgson P D.Metall Mater Trans,2002;33A:1019 [6]Yang W Y,Hu A M,Qi J J,Sun Z Q.Acta Metall Sin,2000;36:1192 (杨王明,胡安民,齐俊杰,孙祖庆．金属学报,2000;36:1192) [7]Cahn J W.Acta Metall,1956;9:449 [8]Khlestov V M,Konopleva E V,Mcqueen H J.Can Metall Q,1998;37:75 [9]Li J,Sun F Y.Acta Metall Sin,1990;26:A378 (李箭,孙福玉．金属学报,1990;26:A378) [10]Yang P,Fu Y Y,Cui F E,Sun Z Q.Acta Metall Sm,2001;37:617 (杨平,傅云义,崔凤娥,孙祖庆．金属学报,2001;37:617) [11]Tamura Imao.Iron Steel,1985;20(1):64 (田村今男 钢铁,1985;20(1):64) [12]Qi J J,Yang W Y,Sun Z Q.Acta Metall Sm,2002;38:897 (齐俊杰,杨王玥,孙祖庆．金属学报,2002;38:897) [1] LIU Xingjun, WEI Zhenbang, LU Yong, HAN Jiajia, SHI Rongpei, WANG Cuiping. 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