Influence of Sample Size and Magnetizing Voltage on Barkhausen Noise during Bending and Uniaxial Tensile Tests |
| J. Šrámek, M. Neslušan, F. Bahleda, K. Zgútová, P. Schenk
University of Žilina, Univerzitná 1, 01026 Žilina, Slovakia |
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| This paper reports about influence of sample thickness and magnetizing voltage on the Barkhausen noise emission during bending as well as uniaxial tensile tests. This study demonstrates that the Barkhausen noise in the tensile stress loading for the low sample thickness and low magnetizing voltage decreases. Such behaviour is considered to be a result of predominating stress anisotropy whereas the crystal anisotropy influence is only minor (or missing). For this reason, the conventional effective value of the Barkhausen noise signal cannot be employed for non-destructive monitoring of stress state in such a case and the magnitude of exerted stresses should be calibrated the width of the Barkhausen noise envelope. It was also found that the sample thickness as well as the manner of exerted loading also play significant roles since the Barkhausen noise tends to increase with increasing tensile stresses, especially for the higher magnetizing fields. |
DOI:10.12693/APhysPolA.137.640 topics: stress, Barkhausen noise, magnetizing |