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Defect Behavior in Mg Alloys with High-accuracy Machine-learning Interatomic Potentials

Research Project

Project/Area Number 20K04175
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionShinshu University

Principal Investigator

Matsunaka Daisuke  信州大学, 学術研究院工学系, 教授 (60403151)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords機械学習ポテンシャル / 人工ニューラルネットワーク / マグネシウム合金 / 底面転位 / 合金元素 / 機械学習 / 第一原理計算 / 原子間ポテンシャル / ニューラルネットワーク / マグネシウム
Outline of Research at the Start

本研究では,第一原理計算と同等の精度を持ちつつ欠陥構造や異種原子間相互作用に対しても適用性を有するような原子間ポテンシャルを人工ニューラルネットワークの枠組みに基づいて開発し,複数の変形モードが塑性変形に関係するMg合金における種々の欠陥の挙動と合金元素による効果を高精度に評価する.

Outline of Final Research Achievements

Magnesium has been of increasingly interest as a promising light structural material because of its low density. Plastic deformation in Mg is contributed by non-basal slips and twinning as well as basal slip. Effects of alloying elements on these deformation modes are reflected to mechanical properties in Mg alloys. In this study, high-accuracy interatomic potentials of Mg alloys based on artificial neural network (ANN) have been developed by using machine learning techniques. The ANN interatomic potentials can describe various defects corresponding to the deformation modes in a hcp structure and interactions between Mg and alloying element atoms. By using the developed ANN interatomic potentials, behaviors of the defects and effects of alloying elements have been analyzed.

Academic Significance and Societal Importance of the Research Achievements

固体材料の力学的挙動の解析に原子系のシミュレーションが用いられるようになってから現在に至るまで,精度の良い原子間ポテンシャルの開発は重要な課題であり続けている. ANN原子間ポテンシャルに関しては,近年注目を集めているが,結晶性固体において弾性場と欠陥構造を精度よく表現することを志向した開発例は未だ少ない.本研究はこのような研究動向に先駆けて,ANN原子間ポテンシャルの構築技術を確立するものであり,Mg合金の研究を格段に進めるだけでなく,計算力学・計算科学の分野におけるインパクトは非常に高い.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] Artificial neural network molecular mechanics of iron grain boundaries2022

    • Author(s)
      Shiihara Yoshinori、Kanazawa Ryosuke、Matsunaka Daisuke、Lobzenko Ivan、Tsuru Tomohito、Kohyama Masanori、Mori Hideki
    • Journal Title

      Scripta Materialia

      Volume: 207 Pages: 114268-114268

    • DOI

      10.1016/j.scriptamat.2021.114268

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Local Plastic Properties near Grain Boundary in Magnesium by Nanoindentation2021

    • Author(s)
      須藤海志, 松中大介, 染川英俊
    • Journal Title

      Journal of the Japan Institute of Metals and Materials

      Volume: 85 Issue: 1 Pages: 1-6

    • DOI

      10.2320/jinstmet.JD202001

    • NAID

      130007959977

    • ISSN
      0021-4876, 1880-6880, 2433-7501
    • Year and Date
      2021-01-01
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 2元系Mg-X合金に対するニューラルネットワーク型原子間ポテンシャルの開発2022

    • Author(s)
      松中大介,永田隆,椎原良典,森英喜
    • 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
      2022 Annual Research Report
  • [Presentation] 計算科学と微小力学試験によるマグネシウムの変形機構と合金元素効果2022

    • Author(s)
      松中大介
    • Organizer
      日本金属学会2022年度秋期第171回講演大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Energetic Analysis of Homogeneous Nucleation of {10-12} Twin in Magnesium2022

    • Author(s)
      Daisuke Matsunaka, So Yoshikawa
    • Organizer
      15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ニューラルネットワークに基づく異材界面の原子間ポテンシャルの開発2022

    • Author(s)
      松中大介
    • Organizer
      日本機械学会第35回計算力学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 固体の欠陥挙動の微視的理解に向けた計算材料科学と一歩外へ2022

    • Author(s)
      松中大介
    • Organizer
      学術講演会「材料・設計・熱流体シミュレーションの最前線」
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ニューラルネットワークに基づくマグネシウムの原子間ポテンシャルの開発2021

    • Author(s)
      松中大介,小細浩輔,椎原良典,森英喜
    • Organizer
      日本機械学会第34回計算力学講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] First-principles Calculations of Phonon States in LPSO Magnesium Alloys2021

    • Author(s)
      Daisuke Matsunaka
    • Organizer
      12th International Conference on Magnesium Alloys and their Applications (Mg2021)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] ミルフィーユ構造を持つマグネシウム合金のフォノン状態の第一原理解析2020

    • Author(s)
      松中大介
    • Organizer
      軽金属学会第138回春期大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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