The changes of magnetic hysteresis loss and effective magnetostriction in non-orienied electrical steel sheets due to compressive stress were investigated Both the hysteresis loss and the ...magnetostriction increased due to application of compressive stress. The hysteresis loss increased in proportion to mechanical work that was done by the magnetostriction under a constant compressive stress. When the applied stress σ was less than 5 MPa, the proportional ratio was almost 2.0 for all samples. When σ≥5 MPa, on the other hand, the ratio was reduced and depended on the samples and its maximum flux density. It is considered that the mechanical work of magnetostriction changed partly into the hysteresis loss through 90° wall creation or disappearance in the magnetization process.
The effect of copper content in the range of 0,01 - 0,6 wt.% on the microtexture of some Fe-Si-Al non-oriented electrical sheets containing several impurity elements was investigated. The sheets were ...laboratory-manufactured and industrial samples of non-oriented electrical steels, decarburized and recrystallized, before the final annealing. Using the EBSD (electron backscatter diffraction) the microtexture was determined. It was found that the microtexture of the alloys containing more copper had fewer crystal grains with easy direction of magnetization in the sheet rolling plane. It was concluded that copper has a negative influence on the magnetic properties of soft-magnetic steel sheets.
The effect of copper content in the range of 0,01 - 0,6 wt.% on the microtexture of some Fe-Si-Al non-oriented electrical sheets containing several impurity elements was investigated. The sheets were ...laboratory-manufactured and industrial samples of non-oriented electrical steels, decarburized and recrystallized, before the final annealing. Using the EBSD (electron backscatter diffraction) the microtexture was determined. It was found that the microtexture of the alloys containing more copper had fewer crystal grains with easy direction of magnetization in the sheet rolling plane. It was concluded that copper has a negative influence on the magnetic properties of soft-magnetic steel sheets.
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