The Effects of Deformation Conditions and Microstructural Features on Typical Textures of a Non-oriented Electrical Steel in Electrically Assisted Forming

Abstract

The effects of deformation conditions on typical textures and the relationship between microstructural features and typical textures in a non-oriented electrical steel during electrically assisted forming were investigated. Specimens processed by electrically assisted tensile forming were measured with electron back-scatter diffraction (EBSD). Results show that Joule heat reduces cube, Goss texture, and h-fiber but enhances rotated cube texture and c-fiber. A stronger cooling rate brings a remarkable decrease of cube texture and c-fiber and an increase of rotated cube and h-fiber. It is concluded that electric current itself enhances cube texture and Goss texture. The variations of grain size and number fraction of rotated cube and Goss grains contribute to the volume fraction variations of rotated cube and Goss texture. The increases of the sum of R3 and R9 grain boundaries, grain boundary curvature, and microstructural defects in Goss grains are responsible for the enhancement of Goss texture.