通过差热扫描分析、X射线衍射和透射电镜等方法研究了Cu的添加对Ti36 Ni49-x Hf15 Cux(x=1,3,5,8)合金马氏体相变行为的影响.研究表明:Cu的加入可稍降低合金的相变温度(约15 ℃),但其Ms仍高于150 ℃,可作为高温形状记忆合金使用;随着Cu含量的升高,合金的B19'马氏体晶格常数a、b和c不发生明显变化,但单斜角β逐渐降低;Ti36 Ni49-x Hf15 Cux(x=1,3,5,8)合金的相组成为B19'单斜马氏体和(Ti,Hf,Cu)2Ni相,马氏体的亚结构为(001)复合孪晶.
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