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研究了CuZnAl形状记忆合金在压应力作用下进行不完全相变热循环或在两相区时效时相变曲线出现的“台阶”现象。结果表明 :外加载荷或延长两相区时效时间 ,均能促进“台阶”效应的发展。记忆元件一旦出现“台阶”效应 ,可在高于Af 以上的适当温度保温一定时间来消除。“台阶”效应可用马氏体时效使马氏体稳定化 ,引起逆转变温度升高 ,及母相时效使母相有序度略有提高 ,使逆相变的相变温度降低来解释
The “step” phenomenon of CuZnAl shape memory alloy undergoing incomplete phase change thermal cycling under compressive stress or the phase change curve of two-phase region aging was studied. The results show that the application of load or the prolongation of the aging time in two-phase region can promote the development of the “step” effect. Memory elements in the event of a “step” effect, can be higher than Af above the appropriate temperature insulation for a certain period of time to eliminate. The “step” effect can be martensitic aging martensite, causing the inverse transition temperature increases, and the mother of aging so that the degree of order of the mother slightly increased, so that the phase transition temperature of the reverse phase change to explain