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Magnetoacoustic measurements on steel samples at low magnetizing frequencies

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    0456003 - FZÚ 2016 RIV SK eng J - Journal Article
    Perevertov, Oleksiy - Stupakov, Alexandr
    Magnetoacoustic measurements on steel samples at low magnetizing frequencies.
    Journal of Electrical Engineering - Elektrotechnický časopis. Roč. 66, č. 7 (2015), s. 58-61. ISSN 1335-3632. E-ISSN 1339-309X
    R&D Projects: GA ČR GA13-18993S; GA ČR GB14-36566G
    Institutional support: RVO:68378271
    Keywords : magneto-acoustic emission * surface magnetic field * steel * magnetic hysteresis
    Subject RIV: JB - Sensors, Measurment, Regulation
    Impact factor: 0.407, year: 2015

    The magneto-acoustic emission (MAE) is measured at low frequencies, sample being magnetized by an external yoke. The sample surface field was accurately measured. Influence of the field and flux density rates on the resulting MAE envelope was studied. It was found that two-peaks MAE with a minimum around the coercivity was due to the minimum in the field rate dH/dt. Division of the MAE signal by the field rate completely removed that artificial minimum making one-peak shape resembling the differential permeability curve.
    Permanent Link: http://hdl.handle.net/11104/0256584

     
     
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