FeMnSi合金热马氏体和应力诱发马氏体相变与形状记忆效应的关系

Study on Relationship Among SME and Thermal and Stress induced Martensite in FeMnSi Alloy

通过研究预应变量３％的两种ＦｅＭｎＳｉ合金形状恢复量与ε－马氏体量随温度的变化，发现ε－马氏体在晶体中存在能量分布，使之在４５０℃回火不能完全逆转变，同时发现应变合金中储存弹性内应力，使材料在Ａｓ～Ａｆ温度区间的膨胀与收缩系数不同。

The change of recovery strain and the volume fraction of ε martensite as a function of temperature for two FeMnSi alloy prestrained by 3% was investigated It suggested that there exist an energy distribution among ε martensite shears which lead part of ε martensite not transformed after heated at 450℃ The internal elastic stress in prestrained FeMnSi shape memory alloy(SMA),which result in the different between constract rate and expansion rate,was showed on partial thermal cycle curve