|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||The John Cahn Memorial Symposium
||Dislocations, Trijunctions and Grain Rotation
||Kevin McReynolds, Akinori Yamanaka,
|On-Site Speaker (Planned)
One of John Cahn’s many talents was his ability to identify important problems that were overlooked by past investigators in a field. John’s work with Jean Taylor on the rotation of grains during grain growth is a perfect example of this and, like usual, has stimulated much interest in the community. Building on his work, we have used a phase field crystal model to describe the dynamics grain growth in both two and three dimensions. We find that the atomic-scale structure of the boundary gives rise to qualitatively new grain growth kinetics as well as to both grain rotation and translation. The grain translation is a result of the climb, glide, and interactions of the dislocations that comprise the grain boundary, as well as dislocation interactions at trijunctions. The important role of the three-dimensional interfacial dislocation structure in the grain translation and rotation processes will be discussed.