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Quantitative understanding on brittle fracture of martensitic steel based on microscopic plastic deformation behavior

Research Project

Project/Area Number 20K21083
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionNational Institute for Materials Science

Principal Investigator

SHIBATA Akinobu  国立研究開発法人物質・材料研究機構, 構造材料研究拠点, グループリーダー (60451994)

Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Keywords脆性破壊 / マルテンサイト鋼 / 塑性変形
Outline of Research at the Start

本研究ではマルテンサイト鋼において生じる脆性破壊を研究対象とし,クラック進展抵抗曲線解析によりマクロ破壊特性を評価すると伴に,走査型電子顕微鏡像を用いたデジタル画像相関法により,各破壊素過程におけるクラック近傍領域のミクロスケールでの塑性変形挙動をその場解析により詳細に調べる.そして得られた結果を基に,各破壊素過程における原子スケール破壊特性/ミクロスケールでの塑性変形挙動/マクロ破壊特性の定量相関を解明する.本研究は,破壊現象におけるこれまでの定性的・現象論的な議論からの脱却・発展を目指すものである.

Outline of Final Research Achievements

The present study investigated microscopic plastic deformation behavior accompanying fracture through scanning electron microscopy - electron backscattering diffraction(SEM-EBSD), digital image correlation(DIC) technique, and finite element simulation. For hydrogen-related intergranular fracture, the intense localization of plastic deformation around the crack tip was confirmed by SEM-EBSD. The hydrogen-related quasi-cleavage cracks formed at the surface of the notch root. The finite element simulations revealed that the plastic strains were maximum at the initiation sites of the quasi-cleavage cracks. Moreover, we confirmed by DIC technique that hydrogen enhanced the local plastic deformation. The relationship between martensite microstructure and plastic deformation behavior under tensile deformation was analyzed by DIC technique. The results suggested that plastic deformation was preferentially accumulated around the prior austenite grain boundaries.

Academic Significance and Societal Importance of the Research Achievements

本研究では,マルテンサイト鋼の脆性破壊という具体的な現象において,その破壊過程におけるミクロスケール塑性変形挙動をSEM-EBSD解析,デジタル画像相関法,有限要素シミュレーションにより定量的に評価した.この結果は,破壊現象における原子スケール破壊特性 / ミクロスケールでの塑性変形挙動 / マクロ破壊特性の定量相関解明に関しての道筋を示したものであるため,破壊研究分野を飛躍的に発展させる契機となる可能性を十分に有していると言える.さらに脆性破壊を抑制するための材料組織制御法に繋がるため,耐破壊特性に優れた材料開発を通して,安全・安心な社会を構成するための社会基盤の構築に貢献しうるものである.

Report

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

    (22 results)

All 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 1 results,  Invited: 5 results)

  • [Int'l Joint Research] Mines ParisTech(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Mines ParisTech(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Hydrogen embrittlement behaviors at different deformation temperatures in as-quenched low-carbon martensitic steel2022

    • Author(s)
      Momotani Yuji、Shibata Akinobu、Tsuji Nobuhiro
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 47 Issue: 5 Pages: 3131-3140

    • DOI

      10.1016/j.ijhydene.2021.10.169

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relationship between mechanical response and microscopic crack propagation behavior of hydrogen-related intergranular fracture in as-quenched martensitic steel2022

    • Author(s)
      Shibata Akinobu、Gutierrez-Urrutia Ivan、Okada Kazuho、Miyamoto Goro、Madi Yazid、Besson Jacques、Tsuzaki Kaneaki
    • Journal Title

      Materials Science and Engineering: A

      Volume: 831 Pages: 142288-142288

    • DOI

      10.1016/j.msea.2021.142288

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of hydrogen on evolution of deformation microstructure in low-carbon steel with ferrite microstructure2022

    • Author(s)
      Okada Kazuho、Shibata Akinobu、Gong Wu、Tsuji Nobuhiro
    • Journal Title

      Acta Materialia

      Volume: 225 Pages: 117549-117549

    • DOI

      10.1016/j.actamat.2021.117549

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrogen-Related Fracture Behavior under Constant Loading Tensile Test in As-Quenched Low-Carbon Martensitic Steel2022

    • Author(s)
      Shibata Akinobu、Takeda Yasunari、Kimura Yuuji、Tsuji Nobuhiro
    • Journal Title

      Metals

      Volume: 12 Issue: 3 Pages: 440-440

    • DOI

      10.3390/met12030440

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characteristics of hydrogen-related fatigue fracture in 2Mn-0.1C martensitic steel2021

    • Author(s)
      Matsumiya Hisashi、Shibata Akinobu、Okada Kazuho、Tsuji Nobuhiro
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 46 Issue: 75 Pages: 37509-37517

    • DOI

      10.1016/j.ijhydene.2021.09.011

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of local stress, strain, and hydrogen content on hydrogen-related fracture behavior in low-carbon martensitic steel2021

    • Author(s)
      Shibata Akinobu、Yonemura Takashi、Momotani Yuji、Park Myeong-heom、Takagi Shusaku、Madi Yazid、Besson Jacques、Tsuji Nobuhiro
    • Journal Title

      Acta Materialia

      Volume: 210 Pages: 116828-116828

    • DOI

      10.1016/j.actamat.2021.116828

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Challenging Ultra Grain Refinement of Ferrite in Low-C Steel Only by Heat Treatment2020

    • Author(s)
      Park Myeong-heom、Shibata Akinobu、Tsuji Nobuhiro
    • Journal Title

      Frontiers in Materials

      Volume: 7 Pages: 604792-604792

    • DOI

      10.3389/fmats.2020.604792

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Microstructural and Crystallographic Studies on Hydrogen-related Fracture in Martensitic Steels2022

    • Author(s)
      Akinobu Shibata, Kazuho Okada, Yuji Momotani, Yu Bai, Nobuhiro Tsuji
    • Organizer
      International Conference on Martensitic Transformation (ICOMAT) 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 低炭素マルテンサイト鋼における水素誘起疲労破壊と微視組織の関係2022

    • Author(s)
      松宮 久,岡田和歩,前河佳晃,柴田曉伸,辻 伸泰
    • Organizer
      日本鉄鋼協会春季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マルテンサイト鋼における水素脆性粒界クラックの3次元形態2022

    • Author(s)
      柴田曉伸,Ivan Gutierrrez-Urrutia, 中村晶子,宮本吾郎,原 徹,津﨑兼彰
    • Organizer
      日本鉄鋼協会春季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] BCC鋼の水素脆性擬へき開破壊におけるserrated markingsの起源2021

    • Author(s)
      岡田和歩,柴田曉伸,辻伸泰
    • Organizer
      日本鉄鋼協会秋季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マルテンサイト鋼およびフェライト鋼における水素脆性擬へき開破壊の微視的特徴2021

    • Author(s)
      岡田和歩,柴田曉伸,辻伸泰
    • Organizer
      日本鉄鋼協会秋季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マルテンサイト鋼における粒界クラックのマルチスケール3次元解析2021

    • Author(s)
      柴田曉伸, グティエレス ウルティア イヴァン, 中村晶子, 宮本吾郎, Yazied Madi, Jacques Besson, 原 徹, 津﨑兼彰
    • Organizer
      日本金属学会秋期講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マルテンサイト鋼の水素脆性クラック伝播挙動2021

    • Author(s)
      柴田曉伸, グティエレス ウルティア イヴァン, 岡田和歩, 宮本吾郎, Yazied Madi, Jacques Besson, 津﨑兼彰
    • Organizer
      ISSS 2021ポストシンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] マルテンサイト鋼の水素脆性粒界クラック2021

    • Author(s)
      柴田曉伸, Ivan GUTIERREZ URRUTIA, 岡田和歩,宮本吾郎,Yazid MADI,Jacques BESSON,津﨑兼彰
    • Organizer
      日本金属学会春期講演大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] マルテンサイト鋼の低温脆性破壊および水素脆性破壊2021

    • Author(s)
      柴田曉伸
    • Organizer
      日本鉄鋼協会春季講演大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] マルテンサイト鋼における水素誘起疲労クラック伝播挙動2021

    • Author(s)
      松宮久,前河佳晃,岡田和歩,柴田曉伸,辻伸泰
    • Organizer
      日本鉄鋼協会春季講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] マルテンサイト鋼とフェライト・パーライト鋼の疲労破壊挙動に及ぼす水素の影響2020

    • Author(s)
      松宮 久, 辻 伸泰, 柴田 曉伸, 岡田 和歩
    • Organizer
      日本鉄鋼協会秋季講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] フェライト鋼の水素脆性擬へき開破壊におけるserrated markingsの起源2020

    • Author(s)
      岡田 和歩, 柴田 曉伸, 辻 伸泰
    • Organizer
      日本鉄鋼協会秋季講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 高強度マルテンサイト鋼の水素脆性粒界クラック2020

    • Author(s)
      柴田 曉伸, Ivan GUTIERREZ URRUTIA, 岡田 和歩, 宮本 吾郎, Yazied Madi, Jacques Besson, 辻 伸泰
    • Organizer
      MRMフォーラム
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-08-03   Modified: 2023-01-30  

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