J. Phys. IV France
Volume 112, October 2003
Page(s) 365 - 368

J. Phys. IV France
112 (2003) 365
DOI: 10.1051/jp4:2003902

Preferred orientation of rolling-induced $\varepsilon$ martensite in an Fe-Mn-Si alloy

K.K. Jee1, W.Y. Jang2 and Y.H. Chung1

1  Division of Materials, Korea Institute of Science and Technology, Seoul 136-791, Korea
2  Division of Metall. and Mater. Engr. & BK 21 Team, Chosun University, Gwangju 501-759, Korea

Preferred orientation of $\varepsilon$ martensite induced by cold rolling is studied in an Fe-27Mn-3.5Si alloy. Since the flat rolling is essentially a plane strain condition, cold rolling is applied to induced the martensite. The alloy consists of stacking faults and thermal $\varepsilon$ martensite with some variants in $\gamma$ matrix. By cold rolling, $\varepsilon$ martensite plates are preferably induced with a single variant, producing a preferred orientation. Rolling-induced $\varepsilon$ martensite is observed to possess a preferred orientation of (1013) $\varepsilon$ [3032] $\varepsilon$. It is revealed that the [3032] $\varepsilon$ and normal direction of (1013) $\varepsilon$ experience the largest contraction and expansion, respectively, in $\gamma\to\varepsilon$ shear deformation when c/a is almost (8/3) 1/2.

© EDP Sciences 2003