磁场对Fe-16Cr-2．5Mo合金阻尼性能及磁畴结构的影响

Effect of magnetic field on damping capacity and domain structure of Fe-16Cr-2.5Mo alloy

研究了直流和交流磁场对Fe-16Cr-2．5Mo合金阻尼性能的影响，并通过观察磁畴结构的变化解释了阻尼性能变化的原因。结果表明：随着直流和交流磁场强度的增加，合金的阻尼性能都呈现先增加后下降的变化规律，但直流磁场时合金在0．08mT达到最大值，而交流磁场时合金在0．03mT达到最大值。另外在交流磁场作用下，合金阻尼性能峰值对应的应变振幅位置发生明显的左移。

Effects of direct current and alternate current magnetic field on damping capacity of Fe-16Cr-2.5Mo alloy were studied. The phenomena were explained using the change of domain structure. The results indicated that with the direct current and alternate current magnetic field increasing, the damping capacity of alloy increases firstly and then decreases. The damping capacity reaches the maximum at 0.08mT in direct current magnetic field and reaches the maximum at 0.03mT in alternate current magnetic field. In addition, the strain amplitude at which the damping capacity reaches maximum moves to left obviously in alternate current magnetic field.