Abstract
Non-grain oriented electrical steel, with minor in-grain orientation gradients, was subjected to interrupted tensile deformations and concurrent microtexture, magnetic property and residual stress measurements. After the upper yield point, clear signatures of mechanical stress relief were observed. Changes in orientation gradients led to annihilation of low-angle (1 to 3 deg) boundaries. Prior deformation compressive residual stresses became tensile and magnetic properties improved. Beyond an optimum true strain of 0.01, this boundary annihilation ceased, compressive stresses were generated, and magnetic properties degraded.
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The authors would like to acknowledge the use of the National Facility of Texture & OIM (a DST-IRPHA facility) for this study. The authors would also like to acknowledge financial, material, and magnetic measurement support from Crompton Greaves Global R&D Centre.
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Manuscript submitted December 2, 2013.
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Shekhawat, S.K., Basavaraj, V., Hiwarkar, V.D. et al. Direct Experimental Observations on Concurrent Microstructure and Magnetic Property Developments in Non-Grain Oriented Electrical Steel. Metall Mater Trans A 45, 3695–3698 (2014). https://doi.org/10.1007/s11661-014-2342-x
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DOI: https://doi.org/10.1007/s11661-014-2342-x