Is it Possible to Use Rolling Methods to Improve Textures on Fe-Mn-Si Shape Memory Alloys?

Abstract

No uniform rolling deformation produces shear strains that give rise to textural and microstructural heterogeneities in processed metals and alloys. In this work, the authors investigate Fe-30Mn-4Si shape memory alloy sheets rolled in different conditions at 600°C, in order to determine the process giving rise to the best structure and the strongest (100)<110> shear texture. This crystallographic orientation is the most favorable for the γ → ε martensitic transformation, which provides the shape memory effect in these alloys. In the current conditions, the authors find that unidirectional rolling produces a shear texture in sheet's surface layers. The authors compare the texture and microstructure from this process to those obtained from reverse rolling and single-roller drive rolling.