Energy consideration of the fcc(γ)→hcp(ε) martensitic transformation in Fe-Mn-Si based alloys

被引：16

作者：

Guo, ZH ^{[1
]}

Rong, YH ^{[1
]}

Chen, SP ^{[1
]}

Hsu, TY ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

来源：

MATERIALS TRANSACTIONS JIM | 1999年 / 40卷 / 04期

关键词：

face-centered cubic lattice; fcc(gamma)-> hexagonal close packed lattice; hcp(epsilon) martensitic transformation; iron-manganese-silicon based alloys; stacking fault; critical driving force; nucleation mechanism; pole mechanism; self-accommodation;

D O I：

10.2320/matertrans1989.40.328

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to understand the mechanism of the fcc(gamma)-->hcp(epsilon) martensitic transformation in Fe-Mn-Si based alloys, an energy analysis has been carried out. A general model considering the nucleation process was proposed and the critical driving force was calculated. The discussion of the possible formation mechanism revealed that for spontaneous martensitic transformation in Pe-Mn-Si based alloys with low stacking fault energy, the pole mechanism can not be supported. The fcc(gamma)-->hcp(epsilon) transformation is mainly dominated by the directly overlapping process of faults, starting from an irregular manner and ending with a regular one, in the way of a self-accommodation mechanism.

引用

页码：328 / 334

页数：7

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