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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2006年第4期650-652,657,共4页
Journal of Functional Materials
关键词
温度记忆效应
形状记忆合金
不完全相变
temperature memory effect
shape memory alloy
incomplete phase transformation
