Magnetoacoustic measurements on steel samples at low magnetizing frequencies

0456003 - FZÚ 2016 RIV SK eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA13-18993S; GA ČR GB14-36566G
Institucionální podpora: RVO:68378271
Klíčová slova: magneto-acoustic emission * surface magnetic field * steel * magnetic hysteresis
Kód oboru RIV: JB - Senzory, čidla, měření a regulace
Impakt faktor: 0.407, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0256584