Cu-Zn-Al合金的显微组织及形状记忆效应  

Microstructure and shape memory effects of Cu-Zn-Al alloy

作　　者：程晓敏[1] 聂邦民[1] 吴兴文[1] 黄凤[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《金属热处理》2008年第9期77-79,共3页Heat Treatment of Metals

摘　　要：研究了合金元素、热处理工艺以及热．机械训练对Cu-Zn-Al合金显微组织和形状记忆效应的影响。结果表明，在Cu-26．4Zn-3．4Al合金中添加微量元素Ti、B可以显著细化晶粒；淬火后马氏体形态为板条状，亚结构为孪品和堆垛层错；850℃淬火及150℃一级时效、50℃二级时效处理后可以获得较好的形状记忆效应；采用约束温度为100℃，训练次数为10～12次的热-机械训练，可以得到较好的双程记忆效应。The effects of alloy elements, heat treatment and thermal-mechanical training process on the microstructure and shape memory effects of Cu-Zn-Al alloy were studied. The results show that the grain size of Cu-Zn-Al alloys can be refined effectively by adding trace Ti and B element. The shape of martensite is lath-like after quenching and the substructure of martensite consists of twins and stacking faults. The shape memory effects can be improved markedly by quenching at 850 ℃ ,first aging at 150 ℃ and second aging at 50 ℃ When the constrained temperature is about 100℃ and thermal- mechanical training cycle numbers are between 10 and 12 times, the two-way shape memory can have better effects.

关 键 词：CU-ZN-AL合金 显微组织 形状记忆效应 晶粒细化 

分 类 号：TG139.6[一般工业技术—材料科学与工程]