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Data assimilation-assisted multi-scale modelling for controlling material microstructures during thermomechanical processes

Research Project

Project/Area Number 20K22393
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Miyoshi Eisuke  東京農工大学, 工学(系)研究科(研究院), 助教 (70880962)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords材料微視組織 / 再結晶 / 粒成長 / 粒界 / フェーズフィールド法 / 分子動力学 / データ同化 / HPC / 結晶粒成長
Outline of Research at the Start

材料製品の高性能化のためには,加工熱処理工程で生じる再結晶・粒成長(新規結晶の核生成・成長に伴う材料組織変化現象)の適切な予測と制御が鍵となる.本研究では,原子の運動を直接扱う分子動力学法,連続体スケールを扱うフェーズフィールド法という異なる材料組織予測モデルをデータ科学を介して融合し,各手法の長所を相補活用したマルチスケール再結晶・粒成長モデルを新たに開発するとともに,高速な変形解析法を構築し同モデルと連成する.これにより,従来にない高精度な加工熱処理シミュレーションを実現し,材料開発の加速に向けた新しい基盤を提供する.

Outline of Final Research Achievements

This study was conducted to improve the prediction of material microstructures by solving the following problems of conventional simulation methods for recrystallization and grain growth: physical properties, recrystallization nucleation, and computational scale. Specifically, by integrating continuum-scale phase-field (PF) models and atomic-scale molecular dynamics (MD) calculations based on data science and high-performance computing techniques, we developed a new method to extract unknown physical properties of grain boundaries. Furthermore, we succeeded in accurately quantifying the conditions for abnormal grain growth, which is one of the dominant mechanisms for recrystallization nucleation, by performing systematic evaluations of the phenomenon using very large-scale PF simulations.

Academic Significance and Societal Importance of the Research Achievements

再結晶・粒成長に伴う材料組織変化の高精度予測・制御は,合金添加に頼らず材料の性能を引き出す「材料組織設計」において極めて重要である.しかしながら,従来の数値手法は「物性値」「再結晶核生成」「計算規模」に課題があり,実組織予測への適用は停滞していた.本研究では,PF法・MD法・データ科学・高性能計算を横断的に用いることで,物性値取得法の確立や核生成条件の同定を推し進め,上記課題に解決方策を与えた.これらは,材料学・計算科学における先端的研究の融合を通じて,組織設計技術の高度化による材料開発加速に向けた基盤を提示したものであり,学術・産業面での貢献が期待できる.

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Novel estimation method for anisotropic grain boundary properties based on Bayesian data assimilation and phase-field simulation2021

    • Author(s)
      Eisuke Miyoshi, Munekazu Ohno, Yasushi Shibuta, Akinori Yamanaka, Tomohiro Takaki
    • Journal Title

      Materials & Design

      Volume: 210 Pages: 110089-110089

    • DOI

      10.1016/j.matdes.2021.110089

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Large-scale phase-field study of anisotropic grain growth: Effects of misorientation-dependent grain boundary energy and mobility2021

    • Author(s)
      Miyoshi Eisuke、Takaki Tomohiro、Sakane Shinji、Ohno Munekazu、Shibuta Yasushi、Aoki Takayuki
    • Journal Title

      Computational Materials Science

      Volume: 186 Pages: 109992-109992

    • DOI

      10.1016/j.commatsci.2020.109992

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Abnormal Grain Growth Induced by Nonuniform Grain Boundary Properties: Large-scale Phase-field Simulation vs. Mean-field Theory2022

    • Author(s)
      Eisuke Miyoshi, Munekazu Ohno, Yasushi Shibuta, Akinori Yamanaka, Tomohiro Takaki
    • Organizer
      15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 分子動力学とフェーズフィールド法のデータ同化による多結晶粒成長からの粒界物性抽出2022

    • Author(s)
      三好英輔,大野宗一,澁田靖,山中晃徳,高木知弘
    • Organizer
      第2回マルチスケールマテリアルモデリングシンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] フェーズフィールド法を主軸とした結晶粒成長過程の計算科学的研究2021

    • Author(s)
      三好英輔
    • Organizer
      日本鉄鋼協会高温プロセス部会若手フォーラム 2021年度第2回研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Phase-field法とベイズ推論に基づく多結晶粒成長観察からの粒界物性抽出法2021

    • Author(s)
      三好英輔,大野宗一,澁田靖,山中晃徳,高木知弘
    • Organizer
      日本機械学会第34回計算力学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 3次元セル構造におけるパターン形成の大規模マルチフェーズフィールド法解析2021

    • Author(s)
      三好英輔,高木知弘,坂根慎治,大野宗一,澁田靖,山中晃徳,青木尊之
    • Organizer
      日本機械学会M&M2021材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] Data assimilation-based approach to estimate grain boundary properties using phase-field grain growth simulations2021

    • Author(s)
      Miyoshi Eisuke、Takaki Tomohiro、Shibuta Yasushi、Ohno Munekazu
    • Organizer
      TMS 2021 150th Annual Meeting & Exhibition (TMS2021)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Validation of a novel measurement method for anisotropic grain boundary properties based on data assimilation and multi-phase-field simulation2020

    • Author(s)
      Miyoshi Eisuke、Takaki Tomohiro、Shibuta Yasushi、Ohno Munekazu
    • Organizer
      The 3rd International Conference on Computational Engineering and Science for Safety and Environmental Problems (COMPSAFE 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 東京農工大学 三好英輔 ホームページ

    • URL

      https://web.tuat.ac.jp/~miyoshi/

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2020-09-29   Modified: 2023-01-30  

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