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本文采用一种精确测量形状记忆效应（ＳＭＥ）和观察不同时期显微组织的方法，研究了Ｃｕ－２６（ｗｔ）％Ｚｎ－４（ｗｔ）％Ａｌ合金，在８００℃淬火后重返母相区１３０℃、１５０℃和１７０℃时效的变化规律．实验结果表明，淬火马氏体进入母相区时效初期形状记忆回复率迅速升高，达到一个最大值后随时效时间而下降，显示出时效过程中马氏体稳定化效应的消除和贝氏体相变的发展这两种不同机制对ＳＭＥ所引起的相反效果，即马氏体稳定化的消除增强着ＳＭＥ而贝氏体相变的发生却恶化着ＳＭＥ．贝氏体在晶界的析出对ＳＭＥ已颇为有害，而当贝氏体在晶内形成时ＳＭＥ将激烈恶化．
In this paper, Cu-26 (wt)% Zn-4 (wt)% Al alloy was investigated by accurately measuring the shape memory effect (SME) and observing the microstructure at different stages. After quenching at 800 ℃, Area 130 ℃, 150 ℃ and 170 ℃ aging law. The experimental results show that the martensite quenched into the matrix region early age response rate of shape memory rapidly increased to reach a maximum value with the aging time decreased, showing the aging process of martensite to stabilize the elimination effect and bainite The development of phase change The opposite effect caused by these two different mechanisms on SME, that is, the elimination of martensite stabilization enhances SME and the occurrence of bainite transformation worsens SME. Precipitation of bainite at grain boundaries has been quite detrimental to SME, whereas SME will be severely deteriorated as bainite forms in the crystal.