|About this Abstract
||Materials Science & Technology 2020
||Grain Boundaries, Interfaces, and Surfaces in Functional Materials: Fundamental Structure-Property-Performance Relationships
||A Survey of Constrained Grain Boundary Migration Mechanisms
||Ian Chesser, Elizabeth Holm
|On-Site Speaker (Planned)
Grain boundary motion accommodates a variety of constraints during polycrystalline grain growth including boundary curvature and local strains generated by a mobile grain boundary network. In this work, we categorize a wide range of constrained grain boundary migration mechanisms via direct analysis of atomic displacement fields generated during clamped molecular dynamics bicrystal simulations and polycrystalline simulations in FCC Ni and BCC Fe. Although our taxonomy of constrained migration mechanisms supports existing models for grain boundary migration in special cases, several interesting examples call for more flexible models. Anisotropic mobility distributions from molecular dynamics simulations are reconciled with experimental data.