中文摘要：

利用扫描电镜、X射线衍射仪、差示扫描量热分析仪和材料试验机等手段,研究不同热处理条件下γ相对Co44Ni26Ga30合金马氏体相变温度、力学性能和形状记忆效应的影响。结果表明：随热处理保温时间的延长,γ相析出增多,使得马氏体相变温度降低;γ相的引入显著改善合金的韧性,但损害了合金的形状记忆回复性能;通过适当的热机械训练可以大幅提高合金的形状记忆回复能力,最大形状回复率可达93%。

英文摘要：

By means of SEM,XRD,DSC and a materials testing machine,the effects of γ phase on the martensitic transformation temperature Ms,mechanical properties and shape memory effect of Co44Ni26Ga30 alloy with different heat-treatments were investigated. Results show that the volume fraction of γ phase increased with prolonging the holding time during the heat treatment,giving rise to the decrease of Ms. The introduction of γ phase improved the ductility of the alloy greatly while deteriorated the shape memory recovery ratio. Upon appropriate thermo-mechanical training,the shape recovery ratio can be enhanced significantly to 93%.