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材料工程  2006 

预应变对铝基体中复合的TiNi合金丝马氏体逆相变的影响

Keywords: 预应变,马氏体相变,TiNi合金,铝基复合材料

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Abstract:

采用示差扫描热分析(DSC)、X射线衍射(XRD)和扫描电子显微分析(SEM)等方法,研究了预应变对铝基体中复合的TiNi形状记忆合金丝的马氏体逆相变的影响。结果表明,预应变的TiNi丝发生两种逆相变,一种是热致马氏体(TIM)的逆相变,另一种是应力诱发马氏体(SIM)的逆相变。预应变样品的TIM逆相变的起始温度与未预应变样品的基本相同。SIM逆相变的起始温度随预应变的增大而升高。TIM和SIM逆相变的分数随预应变的增大而减少。

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