Preisach models for the description of hysteresis in steels

The application of magnetic inspection techniques (like magnetic flux leakage, magnetic particles inspection, etc.) to the nondestructive evaluation of steels requires, in many cases, an understanding of the behavior of the magnetization of the sample as a function of the local value of H and the ma...

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Bibliographic Details
Published in:E-journal of Nondestructive Testing 2007-11, Vol.12 (11)
Main Authors: Guozden, Tomas, Etcheverry, Javier, Sanchez, Gustavo
Format: Article
Language:English
Online Access:Get full text
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Summary:The application of magnetic inspection techniques (like magnetic flux leakage, magnetic particles inspection, etc.) to the nondestructive evaluation of steels requires, in many cases, an understanding of the behavior of the magnetization of the sample as a function of the local value of H and the magnetic history of the sample. This is in particular the case when the residual magnetization of the material must be eliminated, or the local slope of the B vs. H relation is important. The complex relationship between H and B in ferromagnetic materials can be described mathematically in different ways. Preisach models are based on assuming, for a given point of the material, a distribution of elementary two levels hysteresis operators with different switching field intensities. The material magnetization is then described by the fraction of hysteresis operators in the +1 or -1 states. In order to parameterize these models, the distribution function for these elementary operators must be computed, which is usually done from experimental first order reversal transitions.
ISSN:1435-4934
1435-4934