热循环对不同相变温度CuZnAl形状记忆合金性能的影响

来源期刊：中国有色金属学报2009年第3期

论文作者：司乃潮 刘海霞 司松海

文章页码：497 - 504

关键词：CuZnAl形状记忆合金；预应变量；相变温度；记忆效应；冷热循环；热处理工艺, CuZnAl shape memory alloys; pre-strain; transformation temperature; shape memory effect; thermal cycling; heat treatment process

Key words：CuZnAl shape memory alloys; pre-strain; transformation temperature; shape memory effect; thermal cycling; heat treatment process

摘    要：研究了预应变量、热处理工艺和循环介质对不同相变温度CuZnAl形状记忆合金形状记忆效应的影响。结果表明：尽管预应变量、热处理工艺及训练介质均不同，但回复率均随循环次数的增加先上升而后下降，相变温度(361 K以上)高的合金回复率偏低；随着冷热循环训练次数的增加，合金的马氏体转变开始温度(M_s)和奥氏体转变结束温度(A_f)均有所提高，其M_f和A_s均有所降低；经过热循环之后，相变温度(361 K以上)高的合金的相变温度的幅度提高较大，且具有较大的热滞。

Abstract: The effects of different pre-strains, heat treatments and mediums on the shape memory effect of CuZnAl alloys with different transformation temperatures were studied. The results show that the recovery rate increases firstly, then decreases with increasing cycling number, although the pre-strain, heat treatment and medium vary, respectively. The recovery rate is relatively low when the transformation temperature is higher than 361 K. The Martensite transformation starting temperature M_s and Austenite transformation finish temperature A_f increase with increasing cycling number. But both M_f and A_s decline. After thermal cycling, for the alloy with high transformation temperature (above 361K), the range of transformation temperature is enlarged, and the thermal hysteresis is large.

基金信息：江苏省科技型中小企业技术创新基金资助项目
镇江市工业科技攻关资助项目