Mn含量对Fe-Mn-Si-Cr-Ni合金记忆效应的影响机制

发布时间：2018-03-06 04:08

本文选题：形状记忆合金　切入点：Mn　出处：《金属学报》2015年02期 　论文类型：期刊论文

【摘要】：采用OM,EBSD,XRD,TEM和SQUID研究了3种不同Mn含量的固溶态Fe-(14~21)Mn-5.5Si-8.5Cr-5Ni合金在马氏体转变开始温度Ms以上10 K(Ms+10 K)变形前后的形状记忆效应和微观组织.结果表明,固溶态Fe-(14~21)Mn-5.5Si-8.5Cr-5Ni合金的形状记忆效应随Mn含量增加而增加.这是由于:一方面,奥氏体屈服强度与应力诱发e马氏体临界应力的差值随着Mn含量的增加而增大,即提高Mn含量增强了奥氏体抵抗塑性变形的能力;另一方面,Mn含量的提高减小了应力诱发e马氏体的宽度,抑制了a'马氏体的引入,从而提高了应力诱发e马氏体的可逆性.
[Abstract]:Using OM, EBSD, XRD, Fe-, TEM and SQUID solid solution of 3 kinds of different content of Mn (14~21) Mn-5.5Si-8.5Cr-5Ni alloy Ms temperature above 10 K in martensitic transformation (Ms+10 K) shape memory effect before and after deformation and microstructure. The results showed that the solid solution Fe- (14~21) shape memory effect Mn-5.5Si-8.5Cr-5Ni alloy increases with the increase of Mn content. This is because: on the one hand, the austenite yield strength and stress induced martensite in e should be the difference of the critical stress increases with the increase of Mn content, which increased the content of Mn enhances the capacity of plastic deformation resistance of austenite; on the other hand, the increase of the content of Mn decreased e stress induced martensite width, inhibited the introduction of A'martensite, which improves the reversibility of e should stress induced martensite.

【作者单位】：四川大学制造科学与工程学院;四川大学分析测试中心;
【基金】：国家自然科学基金项目51171123和51271128资助~~
【分类号】：TG139.6

【共引文献】