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研究了添加 Ｚｒ，Ｔｉ，Ｂ和 Ｆｅ元素，对 ＣｕＡｎＡｌ形状记忆合金晶粒细化和 晶粒生长的影响；探讨了合金晶粒细化与晶粒生长的机制。试验结果表明：合 金中添加Ｚｒ，Ｔｉ，Ｂ，Ｆｅ元素，晶粒得到显著细化，晶粒生长受到抑制；晶粒 生长受到抑制最大的添加元素为 Ｚｒ，其余顺序为 Ｂ，Ｔｉ，Ｆｅ；添加 Ｚｒ，Ｔｉ的 合金，在９００℃上发生异常晶粒长大现象，这是由于晶界结构的变化，固溶 Ｚｒ，Ｔｉ原子对晶界的作用在高温时削弱及第二相粒子的溶解。添加 Ｂ的合 金，当ＣＢ＜０．０１（ｗｔ％）时，晶粒尺寸随含Ｂ量增多急剧减小；当ｃＢ＞０．０１ （Ｗｔ％）时，晶粒尺寸变化不大，该合金晶粒细化主要是固溶于基体中的硼的 作用。
The effects of adding Zr, Ti, B and Fe elements on the grain refinement and grain growth of CuAnAl shape memory alloy were studied. The mechanism of grain refinement and grain growth was also discussed. The experimental results show that the addition of Zr, Ti, B and Fe elements can remarkably refine the grain growth and inhibit the grain growth. The addition of Zr, Ti, and Fe is the most important additive. Addition of Zr and Ti alloys resulted in abnormal grain growth at 900 ℃ due to the change of the grain boundary structure. The effect of solid solution of Zr and Ti atoms on grain boundaries was weakened at high temperature and the dissolution of second phase particles . When B is added, the grain size decreases sharply with the increase of B content when CB <0.01 (wt%). When cB> 0.01 (Wt%), the grain size does not change much. Grain refinement is mainly the role of boron dissolved in the matrix.