Co-x%Mn合金中的fcc→hcp相变和相关的形状记忆效应  

Shape memory effect associated with fcc→hcp transformation in Co-x%Mn alloys

作　　者：周伟敏[1] 江伯鸿[1] 刘岩[2] 漆瑄 

机构地区：[1]上海交通大学国家教育部高温材料及高温测试重点实验室,上海200030 [2]中国科学院上海硅酸盐研究所,上海200030

出　　处：《功能材料》2003年第4期407-408,411,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50171042)

摘　　要：　Co Mn合金是磁诱发形状记忆效应候选材料之一,本文制备了不同Mn含量的Co Mn合金,研究了合金成分对Co Mn二元合金中应力诱发γ(fcc)→ε(hcp)马氏体相变及形状记忆效应的影响作用,研究结果发现,对于能够发生γ→ε马氏体相变的Co Mn合金,具有部分形状记忆效应;随着Mn含量的增加,马氏体量减小,基体的强度降低,导致合金的形状回复率和可回复应变均有不同程度的下降。CoMn alloys were potential magneticfieldinduced and stressinduced shape memory materials. In this study, CoMn alloys with varied Mn content were prepared. The stressinduced γ(fcc)→ε(hcp) martensitic transformation and shape memory effect of CoMn alloy in terms of Mn content were studied. The experimental results show that CoMn alloys assocated γ→ε transformation have SME. With the increase of Mn content, the strength of alloys tend to decrease, which makes the degree of recovery rate and recoverable strain decrease.

关 键 词：形状记忆合金 马氏体相变 钴基合金 形状记忆效应 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG146.16[金属学及工艺—合金]