About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
An Orientation-field Phase Field Model for Anisotropic Grain Growth |
Author(s) |
Philip Staublin, Peter W Voorhees, James A Warren, Arnab Mukherjee |
On-Site Speaker (Planned) |
Philip Staublin |
Abstract Scope |
Grain boundary properties are a function of the misorientation and inclination of the boundary, or the five macroscopic degrees of freedom. Existing multi-order parameter models of grain growth that include these five degrees of freedom can lead to spontaneous grain formation at boundaries, involve many order parameters, and may not correctly reproduce the kinetics at triple junctions. A potential solution is to employ an orientation-field phase field model that uses a single scalar or vector field to track the local crystal orientation. An extension of the Henry-Mellenthin-Plapp orientation-field model is presented for simulations of anisotropic grain growth, allowing the grain boundary energy and mobility to vary with all five crystallographic degrees of freedom. The model correctly reproduces analytical equilibrium dihedral angles and steady state velocities for triple junctions, showing promise for use in large scale simulations of grain coarsening. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, |