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

High permeability commercial CRGO, cold rolled grain oriented steel was subjected to uni-axial tensile strain in three principal orientations: (110) , (110) and (110) . The samples exhibited remarkably different stress-strain behavior. The numerical values of the strain hardening exponent, n, largel...

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Bibliographic Details
Published in:ISIJ International 2012, Vol.52(11), pp.2100-2108
Main Authors: Shekhawat, Satish Kumar, Vadavadagi, Basavaraj, Hiwarkar, Vijay Devidas, Dumbre, Jayshri, Ingle, Asha, Suresh, K. G., Samajdar, Indradev
Format: Article
Language:English
Subjects:
Applied sciences
cold rolled grain oriented (CRGO)
dislocation density
electrical steel
Exact sciences and technology
Forming
magnetic properties
Metals. Metallurgy
microtexture
misorientation
Production techniques
Rolling
stress
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Summary:High permeability commercial CRGO, cold rolled grain oriented steel was subjected to uni-axial tensile strain in three principal orientations: (110) , (110) and (110) . 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 . The study established constitutive relationships between degradation in magnetic properties and various parameters of the deformed microstructures.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.52.2100