軟鋼における磁歪特性の応力依存性

概要

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Magnetostriction curves of low-carbon steel were measured while applying a magnetic held, either parallel or perpendicular to the uniaxial applied stress. When ferromagnetic steels are magnetized, dimensional change occurs, which is called Magnetostriction. As the magnetic field strength increases, domain wall movement first occurs, causing an increase in magnetostriction, and followed by rotation of domain magnetization, which reduces magnetostriction. The magnetostriction then shows the maximum with the applied field for which the rotation of domain magnetization starts to occur. The maximum value indicates the amount of domain wall movement, which depends on the domain structure in the demagnetized state. The stress application also affects the domain structure through the magnetoelastic interaction. Considering the internal energy, it is predicted that the maximum magnetostriction parallel to the magnetic field increases when the field is either parallel to the compressive stress or perpendicular to the tensile stress. This is potentially useful for nondestructive stress measurement. In this study, the maximum magnetostriction was measured as a function of the applied stress for low-carbon steel, the result of which confirmed the above prediction.
社団法人日本機械学会の論文
1996-02-25