| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
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| Symposium
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Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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| Presentation Title |
An Orientation-Field Phase Field Model of Grain Growth |
| Author(s) |
Phil Staublin, James Warren, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Phil Staublin |
| Abstract Scope |
A phase field model has been developed for isothermal grain coarsening in single-phase polycrystals that allows the grain boundary energy and mobility to vary with all five macroscopic crystallographic degrees of freedom of the grain boundary. A continuous orientation field model for the local orientation of the crystal lattice is employed that is coupled to a single order parameter field, and thus the computation effort is independent of the number of grains in the system. The free-energy functions are rotationally invariant with respect to the choice of an external reference frame. The model captures the trijunction dihedral angles given by the energy balance at the trijunction and does not exhibit anomalous trijunction drag. The correct Wulff shapes are reproduced for cubic grain boundary energy anisotropy. Simulations of polycrystalline thin films demonstrates the ability of the model to capture the effects of small angle grain boundaries on grain growth.
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