变形量对NiTi形状记忆合金相变行为及恢复性能的影响  

Influence of Cold Rolling Reduction on the Phase Transformation Behaviour and Recoverable Properties of NiTi Shape Memory Alloys

作　　者：于学勇[1] 任龙[1] 杨莉[1] 郭国林[1] 

机构地区：[1]常熟理工学院机械工程学院,江苏常熟215500

出　　处：《中国材料科技与设备》2014年第5期48-50,共3页Chinese Materials Science Technology & Equipment

摘　　要：通过低温DSC测试仪、金相显微镜和拉伸试验机，研究NiTi形状记忆合金冷轧变形量对马氏体相变行和形状恢复率的影响。结果表明：冷轧变形生成的应力诱发马氏体和取向不同的丝织构及高密度位错，使得马氏体相变时界面迁移的阻碍作用增加，抑制了相变的发生；随冷轧变形量的增大合金的形状恢复率降低。Influence of cold rolling reduction on the phase transformation behaviour and recoverable Properties of NiTi shape memory alloys by the low temperature DSC tester, optical microscope and tensile testing machine. The results show that： the cold rolling deformation generated different stress induced martensite and the orientation of the texture and high dislocation density which hinder the phase interface migration and hase transition; shape recovery ratio of the alloys decreased with the increase of rolling reduction.

关 键 词：镍钛形状记忆合金 相变 织构 形状恢复率 

分 类 号：TG139.6[一般工业技术—材料科学与工程]