1236 Phase-field法による変形組織にもとづく再結晶組織予測(G01-3 界面とフェーズフィールド法,G01 計算力学)

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  • 1236 Predictions of Recrystallization Microstructure Based on Deformation Microstructure Using Phase-field Method

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The microstructures formed during annealing are significantly affected by the pre-deformation microstructures, since the recrystallized grains originate from dislocation cells or subgrains and subsequent grow driven by the stored energy resulted from dislocation accumulated during deformation. In this study, we develop a numerical model and computational procedure for static recrystallization using a phase-field model coupled with crystal plasticity theory. The microstructure and accumulated dislocation density during deformation of a polycrystalline metal are simulated using finite element method based on the strain gradient crystal plasticity theory. Phase-field simulation of the nucleation and growth of recrystallized grain is performed using the crystallographic orientation and stored energy calculated by crystal plasticity finite element simulation. Through this computational procedure, we can predict the final recrystallization microstructure without introduction of such experimental data due to EBSD (Electron Back-Scattering Diffraction) Analysis.

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