爆炸合成NiTi／NiTi合金的相变行为  

Transformation behaviors of NiTi/NiTi alloys synthesized by explosive welding

作　　者：燕铸[1] 崔立山[1] 郑雁军[1] 

机构地区：[1]中国石油大学材料科学与工程系,北京102249

出　　处：《功能材料》2007年第A08期3215-3217,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目（50471021）;高等学校博士学科点专项科研基金资助项目（20050425002）

摘　　要：采用爆炸焊将两块原子百分比不同的NiTi合金制成大块成分不均匀的NiTi／NiTi复合板，并在此基础上对其相变行为以及相应的回复应变特征进行了研究。结果表明焊后的复合板具有良好的界面结合和可逆马氏体相变；冷变形后NiTi／NiTi合金的逆相变温度及其相变温度范围随预应变量的增大而升高；同时，在较宽的温度范围内得到两步回复应变。The aim of this study was an initial attempt to prepare bulk NiTi/NiTi shape memory alloys with macroscopic heterogeneity in composition by explosive welding and investigate the transformation behavior and strain recovery characteristics of the resulting laminates. After explosive welding, a perfect interfacial bonding between the two components and a reversible rnartensitic transformation were obtained in the tandem. The DSC results showed that the reverse transformation temperatures and the temperature range of NiTi-NiTi alloys increased with increasing prestrain level. Meanwhile, a two-stage strain recovery in a wide temperature range was obtained.

关 键 词：NITI 爆炸焊 马氏体相变 回复应变 

分 类 号：TB34[一般工业技术—材料科学与工程] TB381