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Acta Metall Sin  2009, Vol. 45 Issue (1): 32-36    DOI:
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OVERALL ACTIVATION ENERGY OF ISOTHERMAL TRANSFORMATION IN METAL ALLOY AND ITS MECHANISM II. Isothermal Transformation in β Brasses
KANG Mokuang1; ZHANG Mingxing2; LIU Feng1; ZHU Ming1
1 School of Materials; Northwestern Polytechnical University; Xi'an 710072
2 Division of Materials; School of Engineering; University of Queensland; Brisbane; QLD 4072; Australia
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KANG Mokuang ZHANG Mingxing LIU Feng ZHU Ming. OVERALL ACTIVATION ENERGY OF ISOTHERMAL TRANSFORMATION IN METAL ALLOY AND ITS MECHANISM II. Isothermal Transformation in β Brasses. Acta Metall Sin, 2009, 45(1): 32-36.

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Abstract  

Similarly to steels, in the isothermally treated $\beta$ brasses, the plate-like α1 (bainite) and rod-like α have all themselves C curves. A single phase is always produced in the primary stage, whereas the nearby two-phase complex is usually produced in the medium or final stage of the transformation. Only a single phase and Arrhenius equation must be used to deduce the overall activation energy for the transformation product. By a combination of overall activation energy, morphology and change of free energy, it can be explained that the plate-like α1 (bainite) transformation mechanism follows military atom diffusionless martensite-like shear, occurring in solute-depleted region controlled by solute atom diffusion in parent phase β', and the rod-like α phase results from civilian atom diffusionless interphase control transformation, occurring in the most solute-depleted region controlled by solute atom diffusion in parent phase β'.

Key words:  plate-like α1 (bainite), rod-like α, overall activation energy      martensite-like shear      interphase control transformation      β  brass     
Received:  10 April 2008     
ZTFLH: 

TG111.5

 
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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2009/V45/I1/32

[1] Kang M K, Zhang M X, Liu F, Zhu M. Acta Metall Sin,2009; 45: 25
(康沫狂, 张明星, 刘峰, 朱明. 金属学报, 2009; 45: 25)
[2] Kennon N E, Dunne D P, Middleton L. Metall Trans, 1982; 12A: 551
[3] Takezawa K, Sato S. Trans JIM, 1988; 29 : 894
[4] Han Y S, Kim Y G. J Mater Sci, 1986; 21: 2711
[5] Lee E S, Kim Y G. Scr Metall Mater, 1990; 24: 745
[6] Lee E S, Kim Y G. Acta Metall Mater, 1990; 38: 1669
[7] Lee E S, Kim Y G. Metall Trans, 1990; 21A: 1681
[8] Tabuchi M, Marukawa K, Sato H. J Jpn Inst Met, 1997; 61: 1
(田渊正幸, 丸川 建三郎, 左藤博保. 日本金属学会志, 1997; 61: 1)
[9] Jiang L X, L¨u W, Jiang B H, Hsu T Y (Xu Z Y). Trans Nonferrous Met Soc China, 1991; 1: 57
[10] Meng X K, Chen D M, Yang Y Q, Kang M K. Met Sci Technol, 1992; 11(3, 4): 7
(孟祥康, 陈大明, 杨延清, 康沫狂. 金属科学与工艺, 1992; 11(3, 4): 7)
[11] Meng X K, Wu X L, Liu X, Yang Y Q, Kang M K. Mater Sci Technol, 1993;1(4): 1
(孟祥康, 武小雷, 刘晓, 杨延清, 康沫狂. 材料科学与工艺, 1993; 1(4): 1)
[12] Flewitt P E J, Tower J M. J Inst Met, 1957; 35: 273
[13] Cornelis I, Wayman M. Acta Metall, 1974; 22: 301
[14] Chattopadhyay K, Aaronson H I. Acta Metall, 1986; 34: 695
[15] Wu M H, Wayman M. Metall Mater Trans, 1994; 25: 2581
[16] Meng X K, Kang M K, Yang Y Q, Liu D H. Metall Mater Trans, 1994; 25: 2601
[17] Kang M K, Zhou M, Zhang M X. J Mater Sci Technol, 2005; 21: 437
[18] Zhang L P, Li F Q, Zhang E T, Deng Z H. Mater Mech Eng, 1990; 14(2): 7
(张丽萍, 李福全, 张恩涛, 邓肇豪. 机械工程材料, 1990; 14(2): 7)
[19] Wmanski R S, Fikelxichian B N, Blanger M E, Kixiskin S T, Fastov N S, Golerik S S. Physical Metallography. Moscow: Metallurgist, 1955: 376
(Уманский Я С, Финкельштейн Б Н, Блантер М Е, Кишкин  С Т, Фастов Н С, Горелик С С. Физическое Металловедение Москва: Металлургиздата, 1955: 376)
[20] Porter D A, Easterling K E. Phase Transformation in Metals and Alloy. New York: Van Nostrand Reinhold Company, 1981: 172
[21] Massaski T B. Phase Transformation. Metals Park, OH: ASM, 1970: 433
[22] Kang M K, Zhu M. Trans Mater Heat Treat, 2007; 28(1): 42
(康沫狂, 朱明. 材料热处理学报, 2007; 28(1): 42)
[23] Yang Y Q, Zhang Z F, Shen H M, Wang Y N, Zhao X N, Hong J M, Liu D H, Kang M K. Mater Lett, 1993; 17: 369

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