压缩训练对FeMnSi系合金记忆效应的影响  

INFLUENCE OF COMPRESSIVE TRAINING ON SHAPE MEMORY EFFECT OF FeMnSi ALLOYS

作　　者：张熹[1] 何国求[1] 陈淑娟[1] 向学渊[1] 

机构地区：[1]同济大学材料科学与工程学院上海市金属功能材料开发研究重点实验室,上海200092

出　　处：《上海金属》2009年第4期28-31,共4页Shanghai Metals

基　　金：紧固件用铁基记忆合金的回复量及相变温度的产业化技术攻关项目(DY06001)

摘　　要：对Fe-16Mn-5Si-9Cr-5Ni和Fe-16Mn-5Si-9Cr-5Ni-0．5Al形状记忆舍金进行室温压缩预变形5％～7％-8000C退火15min，循环4次的压缩训练，结果发现压缩训练的方法可以有效提高合金形状回复率，样品均在第二次训练的时候达到最大形状回复率。TEM研究发现训练前母相中层错分布均匀，多次训练后层错密度大大增加，出现大量位错缠结。The Fe-16Mn-5Si-9Cr-5Ni and Fe-16Mn-5Si-9Cr-5Ni-0.5A1 shape memory alloys were suffered 4 compression training cycles. A training cycle consisted of 5 % - 7 % compressive pre-deformation at room temperature and subsequently annealing at 800℃ for 15min. It was turned out that compression training was one of the most effective ways to improve the SME. The maximum SME was obtained after two training cycles. TEM observation showed that the stacking faults were distributed uni- formly before training. However, the stacking faults probability increased to a large extent, and lots of dislocations were tangled after several training cycles.

关 键 词：FeMnSi形状记忆合金 压缩训练 形状记忆效应 

分 类 号：TG139.6[一般工业技术—材料科学与工程] U271[金属学及工艺—合金]