Acta Metall Sin  2005, Vol. 41 Issue (3): 225-230     DOI:

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A general crystallographic model of fcc/bcc(bct) martensitic nucleation and growth in steels

YANG Jinbo; YANG Zhigang; QIU Dong; ZHANG Wenzheng; ZHANG Chi; BAI Bingzhe; FANG Hongsheng

Department of Materials Science and Engineering; Tsinghua University; Beijing 100084

YANG Jinbo; YANG Zhigang; QIU Dong; ZHANG Wenzheng; ZHANG Chi; BAI Bingzhe; FANG Hongsheng. A general crystallographic model of fcc/bcc(bct) martensitic nucleation and growth in steels. Acta Metall Sin, 2005, 41(3): 225-230 .

Abstract References Related Articles Recommended Metrics Download:  PDF(265KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The crystallography of fcc/bcc(bct) martensite transformation, including nucleation and growth, has been discussed from the viewpoint of invariant-line and O-lattice theory. The formation of martensite is accomplished by the immigration of well-defined glissile interface (121)fcc type and its misfit dislocations can produce the lattice invariant deformation (LID) on the basis of phenomenal theory of martensitic crystallography (PTMC), however, LID is retarded slightly after the migration of interphase (121)fcc, i.e.a thin plate-like zone exists without LID in martensite near the well-defined interface. When the temperature reduces to the Ms point, the lattice parameter of austenite matrix is √3/2 times that of the martensite without LID. This critical condition for spontaneous transformation agrees with that the stack fault energy in matrix is less than zero according to Olson and Cohen's nucleation model. Key words:  martensite      phenomenal theory of martensitic crystallography (PTMC)      invariant line       Received:  25 May 2004      ZTFLH:  TG111.5   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors YANG Jinbo YANG Zhigang QIU Dong ZHANG Wenzheng ZHANG Chi BAI Bingzhe FANG Hongsheng URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I3/225 [1] Cohen M, Olson G B, Clapp P C. In: Owen W S, Cohen M, Wayman C M, eds., Proc Int Conf on Martensitic Transformations, ICOMAT 79, Cambridge, Mass: MIT Press, 1979: 1 [2] Christian J W. Mater Sci Eng, 1990; A127: 215 [3] Aaronson H I, Hall M G. Metall Mater Trans, 1994; 25A: 1797 [4] Olson G B, Cohen M. Metall Trans, 1976; 7A: 1905 [5] Olson G B, Cohen M. 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