期刊
PHYSICA B-CONDENSED MATTER
卷 435, 期 -, 页码 109-112出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2013.09.027
关键词
Barkhausen noise; Grain size; Residual stress; RMS voltage envelopes
资金
- European Union (European Social Fund - ESF)
- Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) - Research Funding Program: ARCHIMEDES III
- CNPq
- FAPERGS
Magnetic Barkhausen noise (mBN) is known to be related to magnetization reversal mechanisms and the underlying microstructure in magnetic materials. However, the quantitative evaluation of the material properties is hindered by the stochastic nature of the method combined with the lack of standardization. In this paper, the results of interlaboratory tests on the same series of samples are presented. Electrical steel samples have been prepared with controlled grain size (11-148 mu m) and strain (0-29%) and have been characterized using the mBN technique as developed in three different laboratories. In spite of the different methodologies used, mBN is found to increase with strain and decrease with decreasing grain size, in all cases. Of special interest is the variation of the double-peaked BN envelope with the grain size, with one peak occurring in positive and the other in negative fields. The significance of the methodology used in the correct interpretation of the results for a given material is discussed. (C) 2013 Elsevier B.V. All rights reserved.
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