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Development of data assimilation method for crystal plasticity analysis reflecting dislocation microstructures

Research Project

Project/Area Number 22K14466
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ihara Shiro  九州大学, 先導物質化学研究所, 助教 (60909745)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords走査透過電子顕微鏡法 / その場観察 / 3次元観察 / 透過電子顕微鏡法 / 電子線トモグラフィ / 電子エネルギ損失分光 / 透過電子顕微鏡 / 金属 / 破壊 / 材料力学 / 結晶塑性 / 機械学習 / 転位 / データ同化
Outline of Research at the Start

本研究では電子顕微鏡観察技術と力学解析との融合を目的として,金属中の格子欠陥の電子顕微鏡像に対して機械学習を援用する,データ同化の手法を開発する.透過電子顕微鏡による格子欠陥の3次元再構成を行うだけでなく,その結果を既存の力学解析解析手法に反映させることで,ミクロ組織を直接的に導入する手法を構築する.さらに,その場観察との結果と比較することで,既存の手法における適用範囲を明らかにするだけでなくモデルの修正も試みる.

Outline of Final Research Achievements

In this study, we developed a nanoscale 3D in-situ observation method and obtained important knowledge about the fracture process through in-situ tensile observation of metals.In the former, we succeeded in a world first in capturing nanoparticle sintering in three dimensions through in-situ heating observation.In the latter case, we devised a unique sample preparation method and analyzed the crack propagation process, revealing that amorphization occurs at the crack tip.By analyzing the crack propagation process, it was clarified that amorphization occurs at the crack tip. By gaining knowledge about observation methods and fracture behavior at the nanoscale in this way, it is expected that this knowledge will be applied to advanced analytical techniques in combination with computational science.

Academic Significance and Societal Importance of the Research Achievements

ナノスケールにおける3次元その場観察は例が極めて少なく,ナノ粒子の焼結現象を捉えた例は世界初となる.これによって,ナノ材料の動的挙動を詳細に解析できるものと期待される.また,本研究で得られたナノスケールにおける破壊現象の直視観察結果は破壊モデルの構築にあたって重要な知見になると考えられ,上記3次元その場観察と組み合わせることで更なる展開が期待できる.

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (10 results)

All 2023 2022 Other

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

  • [Journal Article] <i>In situ</i> electron tomography for the thermally activated solid reaction of anaerobic nanoparticles2023

    • Author(s)
      Ihara Shiro、Yoshinaga Mizumo、Miyazaki Hiroya、Wada Kota、Hata Satoshi、Saito Hikaru、Murayama Mitsuhiro
    • Journal Title

      Nanoscale

      Volume: 15 Issue: 23 Pages: 10133-10140

    • DOI

      10.1039/d3nr00992k

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] In-situ observation of crack growth behavior in BCC, FCC, and HCP metals2023

    • Author(s)
      Avala Lavakumar, Shiro Ihara, Hikaru Saito and Mitsuhiro Murayama
    • Organizer
      日本顕微鏡学会第79回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Visualization of crystal to amorphous transformation during crack propagation using in-situ S/TEM combined with EELS2023

    • Author(s)
      Avala Lavakumar, Shiro Ihara, Hikaru Saito and Mitsuhiro Murayama
    • Organizer
      The 20th international microscopy congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] その場加熱電子線トモグラフィー観察によるCu ナノ粒子焼結過程の解析2023

    • Author(s)
      井原史朗,義永瑞雲,佐藤俊介,池内みどり,斉藤光,村山光宏
    • Organizer
      日本顕微鏡学会第79回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Four-dimensional electron microscopy for sintering behavior of anaerobic nanoparticles2023

    • Author(s)
      S. Ihara, H. Saito, M. Yoshinaga, H. Miyazaki, K. Wada, S. Hata, and M. Murayama
    • Organizer
      IMC20 Satellite Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In-situ electron tomography for thermally activated solid reaction of anaerobic nanoparticles2023

    • Author(s)
      S. Ihara, H. Saito, M. Yoshinaga, H. Miyazaki, K. Wada, S. Hata, and M. Murayama
    • Organizer
      The 20th international microscopy congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高分子材料のTEM内引張その場観察およびEELSによる破壊状態解析2023

    • Author(s)
      井原史朗,根北翔,加来公子,斉藤光,村山光宏
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] EELSおよび4D-STEMを用いた結晶性金属材料の引張その場観察における破壊過程の解析2022

    • Author(s)
      井原史朗,斉藤光,木原孝太郎,村山光宏
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 結晶性金属材料におけるき裂進展過程のナノスケール解析2022

    • Author(s)
      井原史朗,斉藤光,木原孝太郎,村山光宏
    • Organizer
      日本材料学会第8回材料WEEK
    • Related Report
      2022 Research-status Report
  • [Remarks] 透過電子顕微鏡によるナノ粒子焼結を4次元で初計測

    • URL

      https://www.kyushu-u.ac.jp/ja/researches/view/935/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2022-04-19   Modified: 2025-01-30  

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