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Characterization of applied tensile stress using domain wall dynamic behavior of grain-oriented electrical steel.

Authors :
Qiu, Fasheng
Ren, Wenwei
Tian, Gui Yun
Gao, Bin
Source :
Journal of Magnetism & Magnetic Materials. Jun2017, Vol. 432, p250-259. 10p.
Publication Year :
2017

Abstract

Stress measurement that provides early indication of stress status has become increasingly demanding in the field of Non-destructive testing and evaluation (NDT&E). Bridging the correlation between micro magnetic properties and the applied tensile stress is the first conceptual step to come up with a new method of non-destructive testing. This study investigates the characterization of applied tensile stress with in-situ magnetic domain imaging and their dynamic behaviors by using magneto-optical Kerr effect (MOKE) microscopy assisted with magneto-optical indicator film (MOIF). Threshold magnetic field (TMF) feature to reflect 180 ° domain wall (DW) characteristics behaviors in different grains is proposed for stress detection. It is verified that TMF is a threshold feature with better sensitivity and brings linear correlation for stress characterization in comparison to classical coercive field, remanent magnetization, hysteresis loss and permeability parameters. The results indicate that 180 ° DWs dynamic in the inner grain is highly correlated with stress. The DW dynamics of turn over (TO) tests for different grains is studied to illustrate the repeatability of TMF. Experimental tests of high permeability grain oriented (HGO) electrical steels under stress loading have been conducted to verify this study. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03048853
Volume :
432
Database :
Academic Search Index
Journal :
Journal of Magnetism & Magnetic Materials
Publication Type :
Academic Journal
Accession number :
121996056
Full Text :
https://doi.org/10.1016/j.jmmm.2017.01.076