固溶温度对铜-铝-锰形状记忆合金冷加工性能的影响  

Effect of Solid Solution Temperature on the Cold Working Properties of Cu-AI-Mn Shape Memory Alloys

作　　者：方文杰[1] 焦玉琴[1,2] 文玉华[1] 李宁[1] 何加强[1] 

机构地区：[1]四川大学制造科学与工程学院,成都610065 [2]青岛大学机电工程学院,青岛266071

出　　处：《机械工程材料》2011年第7期39-42,45,共5页Materials For Mechanical Engineering

基　　金：新世纪优秀人才支持计划项目(NCET-06-0793)

摘　　要：通过光学显微镜、扫描电镜、X射线衍射仪、室温压缩试验机等研究了固溶温度对形状记忆合金Cu-17.55Al-9.84Mn(物质的量分数/%,下同)和Cu-19.1Al-9.9Mn冷加工性能的影响。结果表明:固溶温度对含17.55%Al合金的冷加工性能影响显著,但对含19.1%Al合金的影响较小;含17.55%Al的合金因铝含量较低,经700℃以上温度固溶后冷至室温获得的β相或18R马氏体具有低的有序度,在应力作用下容易发生马氏体转变或马氏体再取向,其冷加工性能显著好于α+β两相区时的;含19.1%Al合金在不同温度固溶后的冷加工性能显著低于含17.55%Al合金的,因其室温组织主要由有序度高的β相组成。The cold working properties of the Cu-17. 55A1 9. 84Mn （mole fraction） and tSu-19. 1A1-9.9 Mn shape memory alloys were studied by means of optical microscopy, scanning electron microscopy, X-ray diffractometer and room temperature compression tester. The results show that the solid solution temperature had a significant effect on the cold working properties of the alloy containing 17.55%A1, but a weak effect on that of the alloy containing 19.1 ~ A1. After solid solution above 700℃,β phase or 18R martensite with low order degree was obtained at room temperature because the alloy containing 17. 55% A1 owned low aluminum content, thus the stress easily made β phase or 18R martensite transform into martensite or martensite reorient, so the cold working properties were much higher than the alloy in two phase a and 13. The cold working properties of the alloy containing 19.1%A1 were far lower than those of the alloy containing 17. 55% A1 as its structure was mainly composed of β phase with high order degree at room temperature.

关 键 词：形状记忆合金 铜一铝一锰合金 冷加工性能 固溶温度 

分 类 号：TG139.6[一般工业技术—材料科学与工程]