Abnormal Growth Mechanisms of Goss Grains in Grain-Oriented Electrical Steels

Wei Min Mao; Y. Li; Ping Yang; Wei Guo

doi:10.4028/www.scientific.net/MSF.702-703.585

Paper Titles

Improving the Reliability of EBSD-Based Texture Analysis by a New Large Area Mapping Technique
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Characterization of Coatings by SEM Based Microdiffraction
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Texture and Microstructure Evolution in Friction Stir Welded Cu-Al Sheets Characterized by EBSD
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Metallographic Preparation for Electron Backscattered Diffraction
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Abnormal Growth Mechanisms of Goss Grains in Grain-Oriented Electrical Steels
p.585

The Effect of Cold Rolling Direction on the Secondary Recrystallization in Fe-3%Si Steel
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Texture and Microstructure Evolution during Box Annealing of a Non-Oriented-Grain Electrical Steel
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Modeling of the Particles Pinning Effect on Grain Growth
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Experimental Investigation of Texture Gradients in Aluminium/Copper Plates Bonded through Explosive Welding Process
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Abnormal Growth Mechanisms of Goss Grains in Grain-Oriented Electrical Steels

Abstract:

The possible mechanisms concerning abnormal growth of Goss grains in grain oriented electrical steels were investigated. The density of inhibitor particles near sheet surface, where the Goss grains located, was lower than that in center layer before secondary recrystallization, and the grains near surface could grow more easily because of reduced pinning effect. Few Goss grains could survive the growth competition and reach the sheet surface, after which the inhibitor particles inside the Goss grains coarsened slower. The phenomenon resulted in easy growth of the Goss grains at the expense of smaller neighboring grains while they could hardly be consumed by larger neighboring grains during the high temperature secondary recrystallization. Very large final size of the Goss grains was then obtained. The mechanisms were discussed based on the hot rolling characteristics and the elastic anisotropy of the ferrite matrix.