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用高温金相显微镜、扫描电镜和正电子湮没技术研究了空位型晶体缺陷对Cu-Al-Zn-Mn-Ni合金马氏体逆转变和形状记忆效应的影响。正电子湮没Doppler增宽线形参数和寿命谱测量以及金相组织观察和晶体结构分析结果表明,马氏体逆转变起始温度、逆转变温度区间宽度以及形状记忆最大恢复率随淬火冷却介质温度的显著变化可以用空位型晶体缺陷浓度的变化给予较好的解释.
The effects of vacancy crystal defects on martensitic transformation and shape memory effect of Cu-Al-Zn-Mn-Ni alloy were investigated by high-temperature optical microscope, scanning electron microscopy and positron annihilation technique. Positron annihilation Doppler broadening linear parameter and lifetime spectrum measurement and microstructure observation and crystal structure analysis show that the initial temperature of martensitic transformation, the width of inverse transition temperature range and the maximum shape memory recovery rate with quenching cooling medium temperature A significant change can be explained by the change in vacancy-type crystal defect concentration.