母相时效对Cu-17Al-10Mn合金相变温度和形状记忆性能的影响  

Ageing effect on martensite transformation temperature and shape memory properties of Cu-17Al-10Mn alloy

作　　者：焦玉琴[1,2] 李宁[1] 文玉华[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：《中国有色金属学报》2009年第1期96-100,共5页The Chinese Journal of Nonferrous Metals

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-06-0793);高等学校博士学科点专项科研基金资助项目(20030610093)

摘　　要：研究母相时效过程中Cu-17Al-10Mn(摩尔分数,%)形状记忆合金马氏体转变温度Ms和形状记忆性能的变化规律。结果表明:合金淬火态的Ms比室温的低,室温时合金为无序母相结构,低温时可转变为马氏体;随着时效温度的提高,Cu-17Al-10Mn合金的Ms和形状恢复率均逐渐升高,并在150℃时效15min后达到最大值,这主要归因于淬火空位的逸出使其对母相的钉扎作用减弱;随着时效温度的进一步提高,由于母相分解为贝氏体,合金的Ms和形状恢复率都下降,在250℃时效15min后,母相完全分解,合金的形状恢复率降低到零。The changing rules of martensite transformation temperature and shape memory properties for Cu-17Al-10Mn （molar fraction, %） alloy during parent phase aging were studied. The results show that the Ms of as-quenched alloy is less than that at room temperature. The as-quenched alloy, which has low degree of order at room temperature, can make thermoelastic martensite transformation with further cooling. With increasing ageing temperatures, Ms as well as the shape recovery ratio of the alloy increases and reaches the maximal value at 150℃ due to the escape of quenched-in vacancies. Then Ms and shape recovery ratio of the alloys decrease with further increasing ageing temperature because of bainite precipitated from parent phase. After ageing at 250 ℃ for 15 min, the shape recovery ratio of the alloys decreases to zero due to the complete transformation to bainite from parent phase.

关 键 词：Cu-17Al-10Mn合金 形状记忆合金 时效效应 马氏体相变 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—合金]