摘要
本文研究了Cu-Zn—Al合金获得双程形状记忆效应(TWSM)最好的方法及其变化规律,并对TWSM的微观机制作了初步探讨。结果表明,用SIM和SME复合的训练方法较单一的SIM或SME训练法具有更好的双程记忆效果,这一结果又与"训练"过程中预形变量有关。合金的双程记忆效果与预变形角度之间存在一最大值,并随训练次数的增加趋于稳定。通过TEM 对亚结构的观察,可以看到合金的双程记忆效应与"训练"过程中位错的引入有密切的关系。
The best methods to obtain the two-way memory effect as well as its chang-ing characteristic and the mechanism on Cu-Zn-Al alloy are discussed in thepaper.The results show that the two-way shape memory behavior of alloysby the method of combining SIM training with SME is better than methodsof SIM training or SME,and the results are related to pre-strain in'train-ing'.The results have a maximum value with change of the angle of pre-strain-tend to stabilization along with increase in the training numbers.By meansof TEM,The observed results on substructure indicate that the TWSM ofalloys is correlated closely to the dislocations produced by training.
关键词
CU-ZN-AL合金
形状记忆效应
two-way shape memory effect
pre-strain combined training
stress induced martensite
substructure
