Abstract
AbstractThe effects of tensile stress and strain on magnetization and magnetic domains in silicon steel sheets were investigated. In the elastic deformation region, magnetization decreased with an increase in strain, while in the plastic deformation region, strain–magnetization properties under stress showed a peculiar characteristic, namely, an increase of magnetization when strain was decreased. We observed lancet and other domains in the specimens after removing the stress applied in the plastic deformation region, especially near grain boundaries. This phenomenon can be explained by changes in the domain structures, which were observed in this study. The features observed in this investigation can be applied to the nondestructive detection of fatigue in metal magnetic materials. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(2): 10–17, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20002
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