( 1. 江西科技师范学院 江西省材料表面工程重点实验室, 南昌 330013 ;
2. 中国科学院 金属研究所， 沈阳 110016)
摘 要: 采用差示扫描量热仪研究了Ti50Ni35Cu15以及Ti50Ni45Cu5(摩尔分数， %)形状记忆合金的温度记忆效应。 结果表明： 温度记忆效应仅在Ti-Ni-Cu合金的逆转变加热过程出现， 在单斜结构马氏体与母相逆相变(B19′→B2)及正交结构马氏体与母相逆相变(B19→B2)过程中均能发生温度记忆效应； 在随后的完全循环过程中， 温度记忆记忆效应不再出现， DSC相变曲线又“恢复”到其原始形态； 而在马氏体相变冷却过程中未发现温度记忆效应。 分析表明， 不完全相变过程中的弹性能再分布是可能的温度记忆效应机制。
关键字: 温度记忆效应； Ti-Ni-Cu合金； 形状记忆合金； 不完全相变
Ti-Ni-Cu shape memory alloy
（ 1. Jiangxi Key Laboratory of Material Surface Engineering,
Jiangxi Science and Technology Normal University, Nanchang 330013, China;
2. Institute of Metal Research, Chinese Academy of Sciences,
Shenyang 110016, China）
Abstract: The temperature memory effect (TEM) of Ti50Ni35Cu15 and Ti50Ni45Cu5 (mole fraction, %) shape memory alloys was investigated by differential scanning calorimeter. The results indicate that TME of Ti-Ni-Cu alloy only exists in the heating process, and TME occurs both in B19′→B2 and B19→B2 transformation during heating process. But, there is no evidence of TME during cooling in the experimented alloy. The analysis suggests that this could be due to the re-distribution of the elastic strain energy during the incomplete transformation.
Key words: temperature memory effect; Ti-Ni-Cu alloy; shape memory alloy; incomplete transformation
