Relationship among manufacture procedures, texture and épsilon martensite in a Fe-Mn-Si based alloy

A.V. DRUKER; V. FUSTER; J. MALARRÍA

Bilbao

Conferencia; International Conference on Martensitic Transformations 2014; 2014

University of the Basque Country, Bilbao

Fe-Mn-Si based alloys show shape memory effect (SME) by a gamma(FCC) to epsilon (HCP) stress induced martensitic transformation. Studies carried out with single crystals have shown that shape recovery depends on the crystal orientation: it is nearly absent if stress acts in the [001] direction and almost perfect when acts on the [414] direction. Therefore, certain crystallographic textures in polycrystals may contribute to a better shape recovery with minor applied stresses. On the other hand the texture is a consequence of the thermal and mechanical material history. This work is devoted to analyze the relationship among forming, texture and amount of stress induced martensite in a Fe-15Mn-5Si-9Cr-5Ni shape memory alloy. Besides we measured the degree of shape recovery and found the effect of the manufacturing procedures on the SM properties.