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Comprehensive Analysis of Hydrogen-Induced Material Degradation Mechanisms through Dynamic Calculations

Research Project

Project/Area Number 20K15013
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionThe University of Tokyo

Principal Investigator

Shimizu Koji  東京大学, 大学院工学系研究科(工学部), 助教 (00838378)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords機械学習ポテンシャル / 第一原理計算 / 水素脆化 / 水素 / アルミニウム / アルミナ / 量子効果 / 分子動力学計算 / 荷電欠陥 / 計算物理 / 材料劣化
Outline of Research at the Start

近年、水素社会の実現に向けた取り組みが加速する中、水素関連部材の材料劣化の抑制は一層重要な課題となってきている。そこで本研究では、理論計算により欠陥と水素を含む系の動的過程を解析し、材料劣化過程を追跡することで水素脆化の包括的な理解を目指す。その過程で計算モデルの規模が問題となるため、第一原理計算と機械学習を組み合わせた手法開発にも取り組む。これらの取り組みから、材料中での水素の振る舞いに対する新たな学理構築を目指す。

Outline of Final Research Achievements

This study aimed to understand the mechanism of material degradation induced by hydrogen from atomic-scale using machine-learning interatomic potentials constructed using first-principles calculations based on density functional theory. Specifically, we accessed the accuracy of predicting hydrogen diffusion in aluminum and performed dynamical calculations considering the quantum effects of hydrogen nuclei. Furthermore, stress tests were conducted through molecular dynamics simulations using relatively large-scale computational models, revealing the hydrogen aggregation within aluminum which accelerates material fracture. Additionally, we conducted further analysis on the alumina-aluminum system, obtaining preliminary results on hydrogen behavior near interfaces.

Academic Significance and Societal Importance of the Research Achievements

水素による材料劣化機構の理解は水素社会の実現に向けた重要な課題であり、材料中における水素の拡散や凝集、欠陥との相互作用等について原子レベルでの解析をより一層推し進める必要がある。本研究では、アルミニウム系材料に着目しそこでの水素の動的過程を調査するために、機械学習を用いた計算手法の開発と応用に取り組んだ。本計算手法を用いた多角的な水素挙動の解析によって、材料劣化につながる要因について様々な知見を得ることができた。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (18 results)

All 2024 2023 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results)

  • [Journal Article] Prediction of Born effective charges using neural network to study ion migration under electric fields: applications to crystalline and amorphous Li <sub>3</sub> PO <sub>4</sub>2023

    • Author(s)
      Shimizu Koji、Otsuka Ryuji、Hara Masahiro、Minamitani Emi、Watanabe Satoshi
    • Journal Title

      Science and Technology of Advanced Materials: Methods

      Volume: 3 Issue: 1 Pages: 2253135-2253135

    • DOI

      10.1080/27660400.2023.2253135

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Using neural network potentials to study defect formation and phonon properties of nitrogen vacancies with multiple charge states in GaN2022

    • Author(s)
      Shimizu Koji、Dou Ying、Arguelles Elvis F.、Moriya Takumi、Minamitani Emi、Watanabe Satoshi
    • Journal Title

      Physical Review B

      Volume: 106 Issue: 5 Pages: 054108-054108

    • DOI

      10.1103/physrevb.106.054108

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Alloying Process at the Interface of Au-Li Studied Using Neural Network Potential2021

    • Author(s)
      SHIMIZU Koji、ARGUELLES Elvis F.、LI Wenwen、ANDO Yasunobu、MINAMITANI Emi、WATANABE Satoshi
    • Journal Title

      Vacuum and Surface Science

      Volume: 64 Issue: 8 Pages: 369-374

    • DOI

      10.1380/vss.64.369

    • NAID

      130008072753

    • ISSN
      2433-5835, 2433-5843
    • Year and Date
      2021-08-10
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Applications of Interatomic Potentials Using Neural Network in Materials Science2021

    • Author(s)
      清水康司、渡邉聡
    • Journal Title

      The Brain & Neural Networks

      Volume: 28 Issue: 1 Pages: 3-30

    • DOI

      10.3902/jnns.28.3

    • NAID

      130008021506

    • ISSN
      1340-766X, 1883-0455
    • Year and Date
      2021-03-05
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phase stability of Au-Li binary systems studied using neural network potential2021

    • Author(s)
      Shimizu Koji、Arguelles Elvis F.、Li Wenwen、Ando Yasunobu、Minamitani Emi、Watanabe Satoshi
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 9 Pages: 094112-094112

    • DOI

      10.1103/physrevb.103.094112

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] High-performance quadratic spectral neighbor analysis potential for Al-H systems to investigate hydrogen embrittlement2024

    • Author(s)
      Y. Liu, K. Shimizu, S. Watanabe
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] High-performance quadratic spectral neighbor analysis potential for Al-H systems to investigate hydrogen embrittlement2023

    • Author(s)
      Y. Liu, K. Shimizu, S. Watanabe
    • Organizer
      ASIAN-24 workshop
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-performance quadratic spectral neighbor analysis potential for Al-H systems to investigate hydrogen embrittlement2023

    • Author(s)
      Y. Liu, K. Shimizu, S. Watanabe
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Neural network potential study of complex solid systems2023

    • Author(s)
      K. Shimizu, S. Watanabe
    • Organizer
      日本表面真空学会学術講演会(招待講演)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Phonon and Point Defect Related Properties of GaN Studied using Neural Network Potential2022

    • Author(s)
      Koji Shimizu, Emi Minamitani, Satoshi Watanabe
    • Organizer
      Psi-k Conference 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phonon and Point Defect Related Properties of GaN Studied using Neural Network Potential2022

    • Author(s)
      Koji Shimizu, Emi Minamitani, Satoshi Watanabe
    • Organizer
      The 22nd International Vacuum Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Analysis of Atom and Ion Behavior near Interfaces and Defects using Machine Learning Potentials2022

    • Author(s)
      K. Shimizu, S. Watanabe
    • Organizer
      Summit of Materials Science and Global Institute for Materials Research Tohoku User Meeting 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of neural network potential to investigate interface structures of metal/Li3PO42021

    • Author(s)
      K. Shimizu, W. Liu, W. Li, Y. Ando, E. Minamitani, S. Watanabe
    • Organizer
      MEMRISYS2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ニューラルネットワークポテンシャルによるAu/Li3PO4界面近傍での欠陥挙動解析2021

    • Author(s)
      清水康司, 安藤康伸, 南谷英美, 渡邉聡
    • Organizer
      2021年日本真空学会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Alloying Process at the Interface of Au-Li Studied Using Neural Network Potential2021

    • Author(s)
      K. Shimizu, E.F. Arguelles, W. Li, Y. Ando, E. Minamitani, S. Watanabe
    • Organizer
      The 9th International Symposium on Surface Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ニューラルネットワークポテンシャルによる金-リチウム合金系の解析2020

    • Author(s)
      清水康司、Elvis F. Arguelles, Wenwen Li, 安藤康伸、南谷英美、渡邉聡
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ニューラルネットワークポテンシャルによる金-リチウム合金化過程の解析2020

    • Author(s)
      清水康司、Elvis F. Arguelles, Wenwen Li, 安藤康伸、南谷英美、渡邉聡
    • Organizer
      2020年日本表面真空学会学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] ニューラルネットワークポテンシャルによるAu(111)/Li3PO4界面近傍での欠陥挙動解析2020

    • Author(s)
      清水康司、李文文、安藤康伸、南谷英美、渡邉聡
    • Organizer
      第46回固体イオニクス討論会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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