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Meeting Materials Science & Technology 2020
Symposium Grain Boundaries, Interfaces, and Surfaces in Functional Materials: Fundamental Structure-Property-Performance Relationships
Presentation Title A Survey of Constrained Grain Boundary Migration Mechanisms
Author(s) Ian Chesser, Elizabeth Holm
On-Site Speaker (Planned) Ian Chesser
Abstract Scope 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.
Proceedings Inclusion? Undecided


A Survey of Constrained Grain Boundary Migration Mechanisms
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Equilibrium and Kinetic Shapes of Grains in Polycrystals
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The Impact of Metastable Grain Boundary States on Mobility in FCC Metal
Thermal Property of Diamond Thin Film on Si (100) Substrate
Vacancy-enhanced Grain Boundary Migration

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