Abstract The B2 → B19′ martensitic transformation in a quenched Ni-rich NiTi alloy was found to proceed under isothermal conditions at temperatures both within and outside of the transformation temperature range as observed during continuous cooling measurement. The variation in the volume fraction of the martensite that appeared during isothermal holding of quenched Ni-rich NiTi alloy at different temperatures T∗ was measured. It was found that the maximum volume fraction of the martensite (45%) appeared during holding at Ms temperature for 30 min. It was found that the kinetics of the isothermal transformation was different for T∗ > Ms and T∗

中文翻译：

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Ti 49 Ni 51 形状记忆合金中等温 B2 → B19' 马氏体转变的动力学

摘要 研究发现，在连续冷却测量期间观察到的转变温度范围内外的温度下，淬火富镍 NiTi 合金中的 B2 → B19' 马氏体转变是在等温条件下进行的。测量了在不同温度 T* 下淬火的富镍 NiTi 合金在等温保持过程中出现的马氏体体积分数的变化。发现马氏体的最大体积分数 (45%) 在 Ms 温度下保持 30 分钟期间出现。发现等温转变的动力学对于 T∗ > Ms 和 T∗ 是不同的