冷变形对FeMnSiCrNi合金形状恢复率和转变温度的影响  

Influence of Cold Deformation on Shape Recovery Ratio and Transformation Temperature of FeMnSiCrNi Shape Memory alloys

作　　者：于学勇[1] 华征潇[1] 

机构地区：[1]常熟理工学院机械工程系,江苏常熟215500

出　　处：《热加工工艺》2009年第24期17-19,共3页Hot Working Technology

基　　金：江苏省高校自然科学研究计划基金资助(04KJD460005)

摘　　要：通过Fe16Mn6Si7Cr7Ni合金变形量的大小和形变的类型来研究马氏体的转变特征。形变类型及变形量为:冷轧13%～28%;拉伸4%～17%。并通过热膨胀法测量合金相转变起始温度和转变终了温度,合金的相组成和微观结构特征通过XRD、SEM获得。研究结果表明:冷变形过程均会导致合金的形状恢复率降低,导致应力诱发ε、α/马氏体的形成,并使热马氏体的Ms低于室温。The characteristics of martensitic transformation in Fe16Mn6Si7Cr7Ni alloy were investigated by the amount and type of deformation： 13 % to 28% cold rolling, and 4% to 17% elongation. The starting and finishing transformation temperature of the alloys was measured by dilatometry method. The constitution and microstructure of the alloys were characterized by X-ray diffi＇action, scanning electron microscopy. The results show that cold forming processes decrease the shape recovery ratio and induce the formation of e and α/martensitic, and make the starting transformation temperature of thermal martensitic below room temtperature.

关 键 词：形状记忆合金 马氏体转变 形变 热膨胀 

分 类 号：TG115.213[金属学及工艺—物理冶金] TG115.25[金属学及工艺—金属学]