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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Non-equilibrium martensitic transformation in metamagnetic shape memory alloys
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Non-equilibrium martensitic transformation in metamagnetic shape memory alloys

机译：磁形状记忆合金中的非平衡马氏体相变

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摘要

The martensitic transformation (MT) in ferromagnetic and metamagnetic shape memory alloys can be induced by changing the temperature or stress but also by applying a magnetic field. In this work, some non-equilibrium processes that take place in a Ni-Mn-In-Co metamagnetic shape memory alloy will be analyzed. The retained austenite at low temperatures under a magnetic field evolves to martensite as soon as the field is removed or reduced. The reduction in the applied field, apart from an instantaneous phase change, leads to a time dependent evolution of the transformed fraction. In addition to the field-related evolution of retained austenite, the cyclic magnetic field induced reverse MT will be analyzed as a function of temperature. The magnetic field induced martensitic transformation (MF1MT) fraction induced at constant temperatures depends on the distance to the equilibrium state: states farther from equilibrium promote larger MFIT fractions.
机译：铁磁性和亚磁性形状记忆合金中的马氏体转变（MT）可以通过改变温度或应力以及通过施加磁场来诱发。在这项工作中，将分析在Ni-Mn-In-Co超磁性形状记忆合金中发生的一些非平衡过程。磁场消失后，残留的奥氏体在磁场作用下会演化为马氏体。除了瞬时相位变化之外，施加场的减小还导致了变换后的分数随时间的变化。除了残余奥氏体的场相关演化之外，还将分析循环磁场感应的反向MT随温度的变化。在恒定温度下感应的磁场感应马氏体相变（MF1MT）分数取决于到平衡态的距离：远离平衡态的状态会促进更大的MFIT分数。

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