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首页> 外文期刊>Scripta materialia >Influence of constraints and twinning stress on magnetic field-induced strain of magnetic shape-memory alloys
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Influence of constraints and twinning stress on magnetic field-induced strain of magnetic shape-memory alloys

机译：约束和孪生应力对磁性形状记忆合金的磁场感应应变的影响

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摘要

Magnetic-field-induced strain of hard 14M and soft 10M martensitic samples of Ni-Mn-Ga single crystals was measured and optically observed in a rotating magnetic field in one- and two-end-constrained conditions. The soft sample showed smooth, continuous deformation of 0.6% when two-end-constrained and 2.7% when one-end-constrained. The hard sample produced no strain when two-end-constrained, and discontinuous deformation of 1.8% when one-end-constrained. Thus, the constraints reduce, and even block, twin boundary motion. This finding must be considered in experiment and applications.
机译：测量了Ni-Mn-Ga单晶硬质14M和软质10M马氏体样品的磁场诱导应变，并在一端和两个端部条件下在旋转磁场中进行了光学观察。柔软的样品在两端受约束时表现出0.6％的平滑连续变形，而在一端受约束时表现出2.7％的平滑变形。硬样品在两端受约束时不产生应变，而在受一端受约束时不连续变形为1.8％。因此，约束减少甚至阻止了双边界​​运动。这一发现必须在实验和应用中加以考虑。

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