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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。
The σ-ε curves of Cu-Zn-Al alloy at each temperature above and below the martensitic transformation point were plotted on the tensile testing machine by electric method. The main results are as follows: (1) The sample was loaded between M_s and M_d, With the increase of temperature, the critical stress needed to induce martensitic transformation increases, and there is a linear relationship between the loading temperature and the critical stress. (2) When loaded above A_f, the complete pseudoelasticity can be theoretically obtained, However, if the loading temperature is too high or the strain is too large, the pseudo-elasticity will be impaired. (3) The samples are deformed at the upper and lower temperature region of M_s, and the sum of the pseudo-elastic recovery and shape memory recovery is above 80% There was a minimum value of the total response nearby, and the pseudo-elastic recovery picked up again below the M_f point.