Driving force for γ→ε martensitic transformation and stacking fault energy of γ in Fe-Mn binary system

被引：371

作者：

Lee, YK ^{[1
]}

Choi, CS

机构：

[1] Colorado Sch Mines, Div Engn, Golden, CO 80401 USA

[2] Yonsei Univ, Dept Met Engn, Seoul 120749, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2000年 / 31卷 / 02期

关键词：

D O I：

10.1007/s11661-000-0271-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A regular solution model for the difference of the chemical free energy between gamma and epsilon phases during gamma --> epsilon martensitic transformation in the Fe-Mn binary system has been reexamined and partly modified based on many articles concerning the M-s and A(s) temperatures of Fe-Mn alloys. Using the regular solution model, the measured M-s temperatures, and a thermodynamic model for the stacking fault energy (SFE) of austenite (gamma), the driving force for gamma --> epsilon martensitic transformation, and the SFE of gamma have been calculated. The driving force for gamma --> epsilon martensitic transformation increases linearly from -68 to -120 J/mole with increasing Mn content from 16 to 24 wt pct. The SFE of gamma decreases to approximately 13 at. pct Mn and then increases with increasing Mn content, which is in better agreement with Schumann's result rather than Volosevich et al.'s result.

引用

页码：355 / 360

页数：6

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