CuAlNiMnTi形状记忆合金马氏体时效研究

利用Ｘ射线分析、原位电阻测量等方法研究了ＣｕＡｌＮｉＭｎＴｉ在马氏体不同温度的时效效应。实验结果表明，淬火态ＣｕＡｌＮｉＭｎＴｉ合金在马氏体态时效过程中发生马氏体稳定化现象；在这一过程中ＯＤ３长程度有序无明显变化，但发生了原子短程无序。马氏体稳定化主要是由原子短程无序引起。

Study of martensite ageing in CuAlNiMnTi shape memory alloy

The isothermal ageing effects of martensite in an as quenched CuAlNiMnTi shape memory alloy have been investigated by means of X ray diffraction and in situ electrical resistivity measurements. Experimental results show that short range atomic disordering takes place during ageing in the martensite state whereas the long range order degree remians almost unchanged. The martensity stabilization is ascribed to the short range atomic disordering.