摘要
研究了固溶、时效及热循环对富钛TiNi合金相变及形状记忆效应的影响。结果表明,经固溶处理和600℃时效后,其相变点A_S,M_S最高,只发生了M(?)B_2相变;在350～550℃时效,出现R相变,其相变点A_S、R_S随时效温度的升高而升高;在400℃时效时M_S最低。经固溶处理试样的形状恢复率均低于各种时效温度处理试样的形状恢复率。热循环可使电阻温度曲线变形,随热循环次数增加,其电阻峰值增高,M_S降低,R_S基本不变,且B_2→R相变过程中各次循环的R-T曲线均有重复性。
The effect of solid soluting, ageing and thermal cycling on Ti-rich TiNi alloy phase transformation and shape memory effect has been systematically studied. The results show that phase transition points As, Ms are the highest and only MB_2 transformation occurs after the solid solution treatment and ageing at 600℃. When the ageing temperature is in the range of 350℃ and 500℃,R phase transformation will take place, and A_s, Rs are increaced with the increase of the ageing temperature. But when ageing at 400℃, Ms becomes the lowest. The shape recovery rate of the specimen after solid solution treatment is lower than that after ageing at any temperatures. The curves of electrical resistances with the variation of temperatures have got the different appearence. The peak value of an electrical resistance goes up with the increase of thermal cycling times,at the same time,the R phase transformation becomes obvious, and Ms decreases, while R_s has almost no change. The cycling R-T curves,pottes in every B_2→R phase transformation,are repeatable.
出处
《西安工业学院学报》
1995年第4期283-288,共6页
Journal of Xi'an Institute of Technology
基金
中国兵器科学研究院预研基金 KDX9308
关键词
时效
相变点
固溶
形状记忆合金
记忆性能
TiNi alloy
ageing
transition point
thermal cycling
shap recovery rate
