温度对Cu-Zn-Al合金的伪弹性和形状记忆效应的影响

来源期刊：中南大学学报(自然科学版)1984年第4期

论文作者：李凯 曹明盛

文章页码：31 - 38

关键词：伪弹性； 马氏体相变； 形状记忆效应； 临界应力； 合金； 相变温度； 弹性回复； 线性关系； 温度过高； 加载

摘    要：在拉力试验机上用电测法测绘了Cu-Zn-Al合金在马氏体相变点上下各温度的σ-ε曲线,所得主要结果如下:(1)试样在M_s与M_d之间加载,随着温度升高,诱发马氏体相变所需临界应力增大,且加载温度与临界应力之间存在着线性关系;(2)在A_f点以上加载,理论上可获得完全的伪弹性,但加载温度过高或应变量过大,均会损害伪弹性;(3)试样在M_s点上下温度区域变形,得到的伪弹性回复和形状记忆回复之和在80%以上,但在M_s点附近总回复量出现一极小值,且伪弹性回复在M_f点以下又有所回升。

Abstract: The stress-strain curves of Cu-Zn-Al alloys at different temperatures have been plotted on the tensile machine with the aid of electrometry. The main results were as follows: 1. When specimens were deformed within the range of M_s and M_d, the critical stress for inducing martensitic transformation increased with the temperature, and there existed a linear relationship between them. 2. When specimens were deformed above Af, complete pseudoelasticity might be obtained theoretically, which might be damaged, however, owing to the excess of strain or deformation temperature. 3. When specimens were deformed above and below M_s temperature, the sum of pseudoelastic recovery and shape memory recovery was above 80%. But the total recovery became minimum near M_s temperature. In addition, the pseudoelastic recovery rose again at a certain temperature below M_f.