J. Phys. IV France 11 (2001) Pr8-211-Pr8-216
Formation of texture and anisotropy of shape memory effect in Fe-Mn-Si-Co-Cr alloyK.K. Jee1, J.O. Song2, W.Y. Jang3, M.C. Shin1 and C.S. Choi2
1 Division of Materials, Korea Institute of Science and Technology, Seoul 136-791, Korea
2 Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
3 Department of Metallurgical Engineering, Chosun University, Kwangju 501-759, Korea
This study is aimed at investigating the anisotropy of shape memory effect in Fe-based alloy. An Fe-15Mn-3Si-4Co-5Cr alloy is cold rolled by 92%, and annealed at 630°C for 45min. The alloy undergoes γ → ε → α transformation by cold rolling and γ is restored with a major preferred orientation of (110) γ  γ by the annealing. The specimens for shape memory effect and tensile test are taken 0, 45, 70, 80 and 90 degs to the rolling direction. The specimen taken along 70 degs to the rolling direction exhibits the best shape memory effect. An analysis of the (110) γ  γ texture reveals that the specimen experiences the deformation stress along [22l] γ which is the most expandable direction in the γ → ε transformation. In tensile test, the best SME specimen shows the lowest yield stress, indicating that the transformation take place most easily since the deformation is applied to the preferential direction to the transformation.
© EDP Sciences 2001