热弹性马氏体相变内耗峰的研究

Internal friction related to thermoelastic martensitic transformations

采用不完全相变内耗测量法,研究了CuAlNiMnTi多晶合金在热弹性马氏体相变时内耗峰与外界变量的依赖关系;实验结果发现,测量频率较低时,内耗峰分解成双峰,随不完全相变温度ts的降低,双峰逐渐合并;高温内耗峰呈现出明显的反常振幅效应。

A partial phase transition method was used in internal friction measurements to study the relation of the internal friction peak with external variables in thermoelastic martensitic transformation of CuA1NiMnTi polycrystalline shape memory alloy. It is found that when the measuring frequency is relatively low, the internal friction peak is composed of two IF peaks and as the partial phase transition temperature ts falls, the double peaks are gradually combined,and that the high-temperature peak has a clear abnormal effect on strain amplitude.