{001}< 120 >-{113}< 361 > recrystallization textures induced by initial {001} grains and related microstructure evolution in heavily rolled electrical steel

摘要

This study investigates the origin of {001}< 120 >-{113}< 361 > recrystallization textures in heavily rolled electrical steel. Initial cube and {001}< 120 > grains contribute to strong {001}< 120 >-{113}< 361 > recrystallization textures. Investigations on {001} columnar grains link recrystallization behavior to initial orientations, and the orientations of new {001}< 120 >-{113}< 361 > grains are related to crystal rotation routes during deformation. Initial cube grains lead to fine nuclei showing strong {001}< 120 > texture component, whereas {001}< 110 > grains cause uniformly deformed microstructure and negligible nucleation. For initial {001}< 120 > grains, the nucleation priority of both {001}< 120 > and {113}< 361 > grains are obtained in deformed {001}-{112}< 110 > areas, and these recrystallized grains are larger than those induced by initial cube grains. In addition to the {001}< 120 >-{113}< 361 > nucleation advantage owing to initial cube and {001}< 120 > grains, {113}< 361 > grains show size advantage and strengthen {113}< 361 > texture. Regarding Hi-B grain-oriented electrical steel samples, {001} grains in annealed hot bands illustrate deformation and recrystallization behaviors similar to those of columnar grains. Preferred {001}< 120 >-{113}< 361 > nucleation and coarse {001}< 120 >-{113}< 361 > recrystallized microstructure show the effect of initial {001}< 120 > grains to high extent, and these coarse recrystallized grains negatively affect the secondary recrystallization of Goss grains. (C) 2016 Elsevier Inc. All rights reserved.