A new model of Goss texture development during secondary recrystallization of electrical steel

A new model of Goss texture development during the secondary recrystallization of electrical steel is proposed and tested in this paper. This model is based on the assumption that high-energy boundaries have high grain boundary diffusion coefficients. High diffusion coefficients facilitate precipitate coarsening along the high-energy boundaries, which in turn makes them mobile before other boundaries. Recent results obtained by the authors show that Goss grains are surrounded by the highest number of high-energy boundaries. The assumption that these boundaries are highly mobile allows the Goss grains to grow during secondary recrystallization. The new model is tested using a Monte-Carlo simulation of the grain growth in a 3-D polycrystalline computer specimen which describes both the microtexture and crystallographic texture of the electrical steel. The results of the simulation agree with experiment. Specifically, the pinning force and incubation time of secondary recrystallization as well as the orientation of the secondary recrystallized grains and the texture changes during grain growth are explained. (C) 1997 Acta Metallurgica Inc.