Grain growth in polycrystalline materials: Current understanding and future research directions

This paper suggests future research directions in grain growth and related subjects. A discussion on the available mechanisms of grain growth has led to an emphasis on the mixed control mechanism of boundary migration and grain growth. The mixed control mechanism of boundary migration and grain growth is briefly described and some possible future directions for grain growth research are presented. Studies on the suggested research subjects seem to be relevant for the enhancement of our basic understanding of grain growth with respect to boundary structure and its application to practical systems.