R相变对双向记忆效应的影响研究  

Investigation of the Contribution of R-phase Transformation on the Two-way Shape Memory Effect

作　　者：封向东[1] 余华军[2] 周继萌[1] 鲍军委[1] 王治国[2] 

机构地区：[1]四川大学物理科学与技术学院,成都610064 [2]电子科技大学应用物理系,成都610054

出　　处：《四川大学学报（自然科学版）》2004年第5期998-1002,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：中国工程物理研究院院外基金(99040536)

摘　　要：作者利用电阻法和伸长率 温度曲线的测试,研究了R相变和马氏体相变对TiNi记忆合金双向记忆效应(TWSME)的贡献,并研究了热机械训练对相变特征的影响.研究结果表明,热机械训练可导致降温时R相的出现,并且R相变对双向记忆效应的贡献远大于马氏体相变的贡献.在双向记忆效应训练过程中,由于位错的引入,能引起相变点Ms,Mf,Rs,As和Af的下降.Electrical resistance measurement and elongation-temperature measurement were used to study the contribution of R-phase and martensitic phase transformation to the two-way shape memory effect. And the effect of thermo-mechanical training on the transformation characteristics was also studied. The results showed that thermo-mechanical training results in the occurrence of R-phase transformation. The R-phase transformation yields a large part of the TWSME. The transformation temperatures of inverse martensitic, martensitic and R-phase transformation temperatures decreased with increasing thermo-mechanical training cycles, which was attributed to the dislocations introduced into the TiNi Shape memory alloys.

关 键 词：TINI形状记忆合金 双向记忆效应 R相变 热机械训练 

分 类 号：TG139.6[一般工业技术—材料科学与工程]