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采用沿CuAlNi单晶 β相 <0 0 1>方向施加拉应力的方法研究了各特征温度范围的超弹行为 .研究表明 :由Af以上在较高应力下冷却至Mf以下卸载时有很高的弹性回复 ;在Mf以下施加较大载荷并卸载后有超弹应变 ;Af以上加载贯穿整个降温升温循环过程产生大于 8%的应力双程形状记忆效应 ;Af以上等温负载导致应力诱发马氏体的稳定化 ,稳定化后的材料可通过热循环或Af～Md 间的加载 -立即卸载循环实现“反稳定化” ;等温处理还会造成应力诱发马氏体的“再稳定化” .
Superelastic behavior of each characteristic temperature range was investigated by applying tensile stress along the β-phase <0 0 1> direction of the CuAlNi single crystal. The results show that when unloaded by a load above Af from higher than Mf, Elastic recovery; greater than the Mf load and unloaded after a superelastic strain; Af load over the whole cooling temperature throughout the process to produce greater than 8% of the stress two-way shape memory effect; Af above isothermal load leads to stress-induced martensite Stabilized and stabilized materials can be “destabilized” by thermal cycling or loading between Af ~ Md - immediate unloading cycles; isothermal processing can also cause “re-stabilization” of stress-induced martensite.