TiNi基形状记忆合金的温度记忆效应研究新进展(英文)  

Recent research development of temperature memory effect in Ti Ni based shape memory alloy

作　　者：李永华[1] 李玉海[1] 赵忠兴[1] 贾薇[1] 邓子玉[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110168

出　　处：《功能材料》2006年第4期650-652,657,共4页Journal of Functional Materials

摘　　要：因为具有形状记忆效应和超弹性,TiNi形状记忆合金已经广泛用做功能材料和生物材料。最近,由不完全相变诱发的特殊的温度记忆效应现象引起关注:如果从马氏体到奥氏体的逆相变在第一次加热中在温度TI处被中断,而后冷却到马氏体相变终了温度以下,在随后的加热过程会出现被一个动力学中断点TS分开的两阶段逆相变,TS可“记住”TI。本文综述了TiNi基形状记忆合金的温度记忆效应及其机制。TiNi shape memory alloy （SMA） has been used widely as functional material and biomaterial due to its unique shape memory effect and superelasticity. Recently, a special phenomenon called temperature memory effect （TME） induced by incomplete phase transformation has attracted much attention： if a reverse transformation from martensite to austenite is interrupted at temperature of T1 on the first heating and cooled down below Mf, a two-stage reverse transformation separated by a kinetic stop Ts will appear in the second heating process, Ts can ＂memorize＂ T1. The TME existing in TiNi based SMA and the mechanism are reviewed in this paper.

关 键 词：温度记忆效应 形状记忆合金 不完全相变 

分 类 号：TG512[金属学及工艺—金属切削加工及机床]