Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第19卷    第1期    总第118期    2009年1月

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文章编号:1004-0609(2009)01-0096-05
母相时效对Cu-17Al-10Mn合金相变温度和
形状记忆性能的影响
焦玉琴1, 2,李  宁1,文玉华1,何加强1

(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
)

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15 min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15 min后,母相完全分解,合金的形状恢复率降低到零。

 

关键字: Cu-17Al-10Mn合金;形状记忆合金;时效效应;马氏体相变

Ageing effect on martensite transformation temperature and
shape memory properties of Cu-17Al-10Mn alloy
JIAO Yu-qin1, 2, LI Ning1, WEN Yu-hua1, HE Jia-qiang1

1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;
2. School of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China

Abstract: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.

 

Key words: Cu-17Al-10Mn alloy; shape memory alloy; ageing effect; martensite transformation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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