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The effects of the structure characteristics on Magnetic Barkhausen noise in commercial steels

2017; Elsevier BV; Volume: 451; Linguagem: Inglês

10.1016/j.jmmm.2017.11.041

1873-4766

Yu Deng, Zhe Li, Juan Chen, Xin Qi,

Non-Destructive Testing Techniques

This study has been done by separately measuring Magnetic Barkhausen noise (MBN) under different structure characteristics, namely the carbon content, hardness, roughness, and elastic modulus in commercial steels. The result of the experiments shows a strong dependence of MBN parameters (peak height, Root mean square (RMS), and average value) on structure characteristics. These effects, according to this study, can be explained by two kinds of source mechanisms of the MBN, domain wall nucleation and wall propagation. The discovery obtained in this paper can provide basic knowledge to understand the existing surface condition problem of Magnetic Barkhausen noise as a non-destructive evaluation technique and bring MBN into wider application.