Abstract

Based on the analysis of grain boundary energy change during the migration of grain boundaries a statistic model of grain growth was developed in which both specific energy and mobility of a grain boundary section were considered to be dependent on the grain orientations in both sides of the boundary. It is shown that the textural effects, i.e. the anisotropy of grain boundary energy and mobility, on the process of grain growth can be described quantitatively with the integrated partial diffusivities of each texture component. It is found that the anisotropy of boundary energy causes an increase on the critical grain size for the minor texture component and a decrease for the major component. This leads to a texture strengthening, i.e. the increase of the volume percentage of the major texture component, before a strong texture change occurs. The model predictions agree with the experimental results well.