Stress- and Magnetic Field-Induced Martensitic Transformation at Cryogenic Temperatures in Fe?Mn?Al?Ni Shape Memory Alloys
Stress- and Magnetic Field-Induced Martensitic Transformation at Cryogenic Temperatures in Fe?Mn?Al?Ni Shape Memory Alloys
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Fe?Mn?Al?Ni 形状记忆合金低温下应力和磁场诱导的马氏体相变
DOI：
10.1007/s40830-017-0132-1
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发表时间：
2017
影响因子：
2.2
通讯作者：
Kainuma Ryosuke
中科院分区：
文献类型：
--
作者：
Xia Ji;Xu Xiao;Miyake Atsushi;Kimura Yuta;Omori Toshihiro;Tokunaga Masashi;Kainuma Ryosuke
研究了Fe-Mn-Al-Ni合金的应力诱发马氏体相变行为和磁场诱导马氏体相变行为。用原位光学显微镜直接观察到了磁场诱导的马氏体逆相变。在4.2~125℃的脉冲磁场下测量了单晶样品的磁化强度，在所有测试温度下都证实了完全的磁场诱导马氏体逆相变。对单晶样品进行了从10K到100K的压缩试验，在所有试验温度下都获得了完整的形状恢复。结果表明，临界应力和临界磁场的温度依赖性都很小，即使在低温下，相变滞后对温度的敏感性也较小。然后利用临界应力和磁场的Clausius-Clapeyron关系，导出了100℃以下马氏体相变过程中的温度依赖关系。
Stress-induced and magnetic-field-induced martensitic transformation behaviors at low temperatures were investigated for Fe–Mn–Al–Ni alloys. The magnetic-field-induced reverse martensitic transformation was directly observed by in situ optical microscopy. Magnetization measurements under pulsed magnetic fields up to 50 T were carried out at temperatures between 4.2 and 125 K on a single-crystal sample; full magnetic-field-induced reverse martensitic transformation was confirmed at all tested temperatures. Compression tests from 10 to 100 K were conducted on a single-crystal sample; full shape recovery was obtained at all tested temperatures. It was found that the temperature dependence of both the critical stress and critical magnetic field is small and that the transformation hysteresis is less sensitive to temperature even at cryogenic temperatures. The temperature dependence of entropy change during martensitic transformation up to 100 K was then derived using the Clausius–Clapeyron relation with critical stresses and magnetic fields.