热处理工艺对Cu-16.2Al-9.9Mn合金形状记忆效应的影响  

Effects of heat treatment on shape memory effect of Cu-16.2Al-9.9Mn alloy

作　　者：何加强[1] 焦玉琴[1] 文玉华[1] 李宁[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《金属热处理》2008年第11期78-81,共4页Heat Treatment of Metals

基　　金：新世纪优秀人才支持计划项目(NCET-06-0793)

摘　　要：通过弯曲测试法、电阻法和显微组织分析等方法研究了淬火后时效处理温度和分级淬火温度对Cu-16.2Al-9.9Mn(at%)合金相变温度、微观组织及形状记忆效应的影响。结果表明,Cu-16.2Al-9.9Mn合金淬火后的形状记忆效应偏低。采用淬火后时效和分级淬火处理后,合金的形状记忆效应由于热弹性马氏体的出现得到较大提高。合金的形状记忆效应和相变温度随着时效温度和分级淬火温度的升高逐步提高,分级淬火处理后的形状记忆效应低于相同温度时效后的形状记忆效应。The effects of aging temperatures after quenching and step quenching temperature on transformation temperature, microstructures and shape memory effect of Cu-16. 2Al-9.9Mn（at% ）were studied by means of bending tests,electrical resistance and optical microscopy analysis. The results show that the shape memory effect of the alloy subjected to ageing after quenching and step quenching is better than that only subjected to quenching because of the existence of thermoelastic martensite. With increasing the ageing temperature after quenching and the step quenching temperature, both the shape memory effect and transformation temperature of the alloy increase. However, the shape memory effect after step quenching is lower than that after ageing at the same heat treatment temperature.

关 键 词：CU-AL-MN合金 分级淬火 时效 形状记忆效应 

分 类 号：TG139.6[一般工业技术—材料科学与工程]