The Effect of Texture on Grain Growth: Theoretical Consideration of Grain Growth in the Presence of Textures

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