Magnetic Properties in Deformed Grain Oriented Electrical Steel: On the Role of Strain Hardening Exponent and Microstructural Developments

Satish Kumar Shekhawat; Basavaraj Vadavadagi; Vijay Devidas Hiwarkar; Jayshri Dumbre; Asha Ingle; K. G. Suresh; Indradev Samajdar

doi:10.2355/isijinternational.52.2100

Regular Article

Magnetic Properties in Deformed Grain Oriented Electrical Steel: On the Role of Strain Hardening Exponent and Microstructural Developments

Satish Kumar Shekhawat, Basavaraj Vadavadagi, Vijay Devidas Hiwarkar, Jayshri Dumbre, Asha Ingle, K. G. Suresh, Indradev Samajdar

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Keywords: cold rolled grain oriented (CRGO), electrical steel, magnetic properties, misorientation, dislocation density, microtexture, stress

JOURNAL FREE ACCESS

2012 Volume 52 Issue 11 Pages 2100-2108

DOI https://doi.org/10.2355/isijinternational.52.2100

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Abstract

High permeability commercial CRGO, cold rolled grain oriented steel was subjected to uni-axial tensile strain in three principal orientations: (110) <001>, (110) <110> and (110)<111>. The samples exhibited remarkably different stress-strain behavior. The numerical values of the strain hardening exponent, n, largely determined the degradation in magnetic properties: namely increase in Hysteresis loss (H) and drop in Permeability (μ). Changes in magnetic properties were also correlated with microstructural observations: misorientation and dislocation density developments, relative recovery, residual strain and deviation from ideal <001>. The study established constitutive relationships between degradation in magnetic properties and various parameters of the deformed microstructures.

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