Cu-Zn-Al合金两相区淬火对形状记忆效应的影响

Effect of Quenching from α+β Area on Memory Effect of Cu-Zn-Al Shape Memory Alloy

在α+β两相区不同温度淬火对CU—25.44Zn—3.94Al形状记忆合金的相组成、相变温变及形状记忆效应的影响。研究结果表明,Cu—Zn—Al合金在α+β两相区合适的温变加热淬火,晶粒细小,其形状记忆效应优于在β单相区加热淬火者且相变温度较易调整,单向和双向记忆效应最佳的淬火温变分别为720℃和700℃,讨论了α+β两相区淬火对双向记忆效应影响的机制。

In order to improve fatigue durability of the Cu -Zn -Al shape memory alloy, the effect of different quenching temperatures within α + β area on phase components, phase transition temperature and shape memory effect of a Cu -25.44 Zn -3.94 Al shape memory alloy has been studied. The experiment results show that specimens quenched from suitable temperatures within the α + β area have much finer crystal grains and exhibit better shape memory effect than those quenched from temperatures in β area. Their phase transition temperatures can be controlled conveniently by varing the quenching temperature. The optimum quenching temperatures for one -way shape memory effect and two -way shape memory effect are 720 ℃ and 700℃, respectively. The mechanism of the effect of quenching temperature within α+ β area on two - way shape memory effect of the alloy has been discussed.