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Effects of Grain Boundary on {100} Recrystallization Texture of High Silicon Electrical Steel
Hongjiang Pan,Li Xiang,Shengtao Qiu 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.1
In this study, high silicon electrical steel (Fe-6.5 wt% Si alloy) as-cast ingot with columnar grains was prepared bydirectional solidification. Additionally, equiaxed-grained samples with different initial grain sizes were fabricatedby casting, rolling and annealing at different temperatures. The deformation band, dislocation morphology andrecrystallization texture of these samples during subsequent rolling and annealing were investigated. The effects ofinitial grain boundary directions of columnar-grained samples and initial grain sizes (grain boundary densities) ofequiaxed-grained samples on the {100} recrystallization texture of high silicon electrical steel were analyzed. Theresults showed that the grain boundaries played an important role in the formation of the {100} recrystallizationtexture. Due to a low dislocation density (low deformation stored energy) after rolling, the samples without grainboundaries parallel to transverse direction (e.g. rolling along the axis of the columnar grains) or with small grainboundary densities (e.g. large initial grain sizes) were favorable to the formation of a {100} recrystallization textureduring annealing.