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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Algorithm Development in Materials Science and Engineering
Presentation Title Bayesian Data Assimilation for Phase-field Simulation of Solid-state Sintering
Author(s) Akimitsu Ishii, Akinori Yamanaka, Yuki Okada, Akiyasu Yamamoto
On-Site Speaker (Planned) Akimitsu Ishii
Abstract Scope Phase-field (PF) method is a powerful numerical simulation methodology for analyzing microstructural evolutions during a solid-state sintering. However, many physical values and material parameters of sintered materials, such as polycrystalline bulk superconducting materials, are unknown and immeasurable. On the other hand, recently, the three-dimensional (3D) microstructural evolution during the sintering can be observed using advanced experimental techniques (e.g. X-ray computed tomography). Data assimilation (DA) based on the Bayesian inference enables us to combine the experimental data with the numerical simulation and to identify unknown physical values and material parameters. In this study, we have applied an ensemble-based four-dimensional variational (En4DVar) DA method to a 3D phase-field simulation of solid-state sintering. Through numerical experiments, we show that En4DVar can simultaneously estimate multiple material parameters including a grain boundary mobility only from the morphological data of sintered material.
Proceedings Inclusion? Planned:

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