Accuracy Evaluation of Phase-field Models for Grain Growth Simulation with Anisotropic Grain Boundary Properties

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  • Miyoshi Eisuke
    Graduate School of Science and Technology, Kyoto Institute of Technology
  • Takaki Tomohiro
    Faculty of Mechanical Engineering, Kyoto Institute of Technology
  • Ohno Munekazu
    Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University
  • Shibuta Yasushi
    Department of Materials Engineering, The University of Tokyo

説明

<p>The phase-field method has been widely employed recently for simulating grain growth. Phase-field grain growth models are classified into two types according to their conservation constraints for phase-field variables: the multi-phase-field model and the continuum-field model. In addition, within the multi-phase-field model framework, three models with different formulations exist. These models are reported to accurately simulate grain growth under conditions of isotropic or weakly anisotropic grain boundary energy and mobility. However, for cases of strongly anisotropic grain boundary properties, the accuracy of these models has not yet been examined in detail. In this study, using the continuum-field model and three different multi-phase-field models, systematic grain growth simulations with anisotropic grain boundary energies and mobilities are performed. Through the detailed investigation of the accuracy of the simulated results, the suitability of each model for anisotropic grain growth simulations is revealed. Furthermore, based on the higher-order terms, accuracy improvement of the phase-field models is attempted.</p>

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