Shape-memory effect in Co-Ni single crystal^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：周伟敏 刘岩 张少宗 江伯鸿

文章页码：223 - 226

Key words：Co-based alloys; shape memory effect; Shockley partial dislocation

Abstract: The thermal shape-memory effect at room temperature for Co-32%Ni(mass fraction) magnetic shape memory alloy of single crystal was presented. When compressing the sample along the [001] direction at room temperature, strain can be recovered to some extent during later heating and the recovery rate varies with the pre-strain. But no obvious recoverable strain can be obtained along other crystal directions. For the thermal-mechanical training of the sample along [001], the recovery strain decreases obviously during the second round of compress and nearly no recovery happens after the third round of compress. A possible mechanism based on reversible motions of Shockley partial dislocations was proposed.