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.
出处
《热加工工艺》
CSCD
北大核心
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)
关键词
形状记忆合金
马氏体转变
形变
热膨胀
shape memory alloys
martensitic transformation
deformation
dilatometry
