γ相对磁形状记忆合金Co-Ni-Ga马氏体相变和形状记忆效应的影响

稀有金属材料与工程, 2010, 39(7): 1279-1283.

γ相对磁形状记忆合金Co-Ni-Ga马氏体相变和形状记忆效应的影响

霍颜秋 ^1, , 龙秀慧 ^2, , 谢华 ^3, , 李建国 ^4,

1.上海交通大学,上海,200240

2.滨州学院,山东,滨州,256600

3.上海交通大学,上海,200240

4.上海交通大学,上海,200240

基金项目: 国家自然科学基金资助项目(50671068)

关键词： γ相 , Co-Ni-Ga合金 , 马氏体相变 , 形状记忆效应

Influence of γ Phase on the Martensitic Transformation and Shape Memory Effect of Co-Ni-Ga Ferromagnetic Shape Memory Alloy

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%.

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γ相对磁形状记忆合金Co-Ni-Ga马氏体相变和形状记忆效应的影响

Influence of γ Phase on the Martensitic Transformation and Shape Memory Effect of Co-Ni-Ga Ferromagnetic Shape Memory Alloy

参考文献