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Investigation of the strain redistribution mechanism in titanium alloys using image-based crystal plasticity analysis

Research Project

Project/Area Number 19K04983
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionKitami Institute of Technology

Principal Investigator

Kawano Yoshiki  北見工業大学, 工学部, 准教授 (20634413)

Co-Investigator(Kenkyū-buntansha) 光原 昌寿  九州大学, 総合理工学研究院, 准教授 (10514218)
眞山 剛  熊本大学, 大学院先端科学研究部(工), 准教授 (40333629)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords局所変形 / ひずみの再分配 / slip operation factor / 結晶塑性解析 / 力学的相互作用 / EBSD / チタン / HCP / ひずみ集中 / ひずみの局在化 / αチタン / 不均一変形 / SOF / 数値シミュレーション / 微視組織 / ひずみ再分配 / イメージベース結晶塑性解析 / Slip operation factor / イメージベースシミュレーション
Outline of Research at the Start

チタン合金に生じる微視的な不均一変形は,ひずみの局在化及び疲労や破壊に繋がるため,理解すべき重要な変形機構である.このひずみの局在化には,変形しやすい領域とし難い領域間でのひずみの再分配が関わると考えられる.本研究では,チタン合金の微視組織画像を直接用いた結晶塑性解析(イメージベース結晶塑性解析)により,チタン合金の結晶粒レベルでのひずみの局在化とひずみ再分配との関係解明を目指す.

Outline of Final Research Achievements

In titanium and its alloys, strain localization leading to the fracture is an important mechanism to understand. In this study, we attempted to explain the mechanism of strain localization at the crystal grain level observed in α titanium and dual phase titanium alloys by using the concept of “strain redistribution” between grains with different deformation resistance. The following results were obtained: (i) Strain localization and concentration in polycrystalline titanium were successfully explained by the concept of strain redistribution. (ii) While mechanical interactions between adjacent grains have been focused on as a mechanism of strain localization in titanium, strain redistribution occurs between a longer range of grains and affects the strain localization.

Academic Significance and Societal Importance of the Research Achievements

本研究では,構造材料としてのチタンの局所変形機構を,ひずみの再分配という概念を用いて説明した.このことは,チタンの破壊機構の理解に繋がるだけではなく,更なる高性能化の指針となる.また,本研究でひずみの再分配機構の調査のために開発した,すべり変形の起こりやすさの指標Slip operation factor(SOF)は,チタンに留まらず多結晶体の変形機構を調査するためのツールとして用いることができる.以上より,本研究の学術的意義,社会的意義が認められる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (22 results)

All 2022 2021 2020 2019

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Local slip activities in polycrystalline α-Ti depending on textures and strain rates2022

    • Author(s)
      Kawano Yoshiki、Mayama Tsuyoshi、Okamoto Taiki、Mitsuhara Masatoshi
    • Journal Title

      Materials Science and Engineering: A

      Volume: 843 Pages: 143133-143133

    • DOI

      10.1016/j.msea.2022.143133

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Analysis of Strain Rate Dependency on Activities of Slip Systems in Polycrystalline α-Ti2021

    • Author(s)
      OKAMOTO Taiki、KAWANO Yoshiki、MAYAMA Tsuyoshi、MITSUHARA Masatoshi、YAMASAKI Shigeto、SATO Michihiro
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 70 Issue: 5 Pages: 393-399

    • DOI

      10.2472/jsms.70.393

    • NAID

      130008040243

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2021-05-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generalized Slip Operation Factor Considering Contribution of Secondary Slip Systems2021

    • Author(s)
      Kawano Yoshiki、Mayama Tsuyoshi、Mitsuhara Masatoshi、Yamasaki Shigeto、Sato Michihiro
    • Journal Title

      Materials Today Communications

      Volume: 26 Pages: 102041-102041

    • DOI

      10.1016/j.mtcomm.2021.102041

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 多結晶α-Tiにおけるすべり系活動度のひずみ速度依存性の数値解析2021

    • Author(s)
      岡本 泰生、河野 義樹、眞山 剛、光原 昌寿、山﨑 重人、佐藤 満弘
    • Journal Title

      材料

      Volume: 70 Pages: 393-399

    • NAID

      130008040243

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quantitative evaluation of slip activity in polycrystalline α-titanium considering non-local interactions between crystal grains2020

    • Author(s)
      Kawano Yoshiki、Sato Michihiro、Mayama Tsuyoshi、Mitsuhara Masatoshi、Yamasaki Shigeto
    • Journal Title

      International Journal of Plasticity

      Volume: 127 Pages: 102638-102638

    • DOI

      10.1016/j.ijplas.2019.12.001

    • NAID

      120007183142

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crystal Plasticity Analysis of Microscopic Deformation Mechanisms and GN Dislocation Accumulation Depending on Vanadium Content in β Phase of Two-Phase Ti Alloy2019

    • Author(s)
      Kawano Yoshiki、Ohashi Tetsuya、Mayama Tsuyoshi、Mitsuhara Masatoshi、Okuyama Yelm、Sato Michihiro
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 60 Issue: 6 Pages: 959-968

    • DOI

      10.2320/matertrans.M2019016

    • NAID

      130007653194

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2019-06-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Investigation of strain redistribution mechanism in α titanium by image-based crystal plasticity analysis2019

    • Author(s)
      Kawano Yoshiki、Ohashi Tetsuya、Mayama Tsuyoshi、Tanaka Masaki、Okuyama Yelm、Sato Michihiro
    • Journal Title

      The European Physical Journal B

      Volume: 92 Issue: 9 Pages: 204-204

    • DOI

      10.1140/epjb/e2019-100238-3

    • NAID

      120006887458

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] (α+β)-Tiの異相間のslip transferと不均一変形に関する結晶塑性解析2022

    • Author(s)
      工藤啓, 河野義樹, 眞山剛, 光原昌寿, 佐藤満弘
    • Organizer
      日本機械学会第59回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 多結晶金属のCRSS予測システムの構築と改良2022

    • Author(s)
      佐藤彰洋, 河野義樹, 佐藤満弘
    • Organizer
      日本機械学会第59回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 集合組織を有するα-Ti 多結晶体におけるすべり系活動度のひずみ速度依存性に関する数値 解析2021

    • Author(s)
      岡本泰生, 河野義樹, 眞山剛, 光原昌寿, 佐藤満弘
    • 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] CP-Tiに生じる不均一変形機構の数値解析2021

    • Author(s)
      河野義樹, 眞山剛, 光原昌寿, 佐藤満弘
    • Organizer
      日本金属学会2021年秋期第169回講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 純チタンにおける塑性ひずみの不均一分布2021

    • Author(s)
      宋子碩, 出口岬, 山﨑重人, 光原昌寿, 中島英治, 眞山 剛, 河野義樹
    • Organizer
      日本金属学会2021年秋期第169回講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ( α+β )-Ti における不均一変形の進行と応力分配の関係の結晶塑性解析2021

    • Author(s)
      工藤 啓、河野 義樹
    • Organizer
      日本鉄鋼協会第181回春季講演大会 第53回学生ポスターセッション
    • Related Report
      2020 Research-status Report
  • [Presentation] Prediction of Slip Operation of Polycrystalline α-Titanium by Slip Operation Factor2020

    • Author(s)
      Yoshiki Kawano, Tsuyoshi Mayama, Masatoshi Mitsuhara, Shigeto Yamasaki, Michihiro Sato
    • Organizer
      Asia-Pacific Conference on Fracture andStrength 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 岡本 泰生、河野 義樹、眞山 剛、光原 昌寿、山﨑 重人、佐藤 満弘2020

    • Author(s)
      α-Ti多結晶体の変形とひずみ速度依存性に関する結晶塑性解析
    • Organizer
      材料シンポジウム 「若手学生研究発表会」
    • Related Report
      2020 Research-status Report
  • [Presentation] 河野 義樹、岡本 泰生、眞山 剛、光原 昌寿、山﨑 重人、佐藤 満弘2020

    • Author(s)
      多結晶α-Tiにおけるすべり系活動度のひずみ速度依存性
    • Organizer
      日本金属学会 2020年秋期 第167回講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] αチタンにおけるすべり系活動度評価の結晶塑性シミュレーション2020

    • Author(s)
      河野 義樹
    • Organizer
      高温材料の高強度化研究会・第5回研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] SOFを用いたひずみの空間分布予測とその妥当性の検証2020

    • Author(s)
      河野義樹、眞山剛、光原昌寿、山﨑重人、佐藤満弘
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 変形の進展に伴う結晶格子回転を考慮したαチタン微視組織の結晶塑性解析2019

    • Author(s)
      河野義樹、眞山剛、光原昌寿、佐藤満弘
    • Organizer
      日本材料学会第68期学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] αチタンにおけるすべり系活動への結晶粒間相互作用の影響とその範囲2019

    • Author(s)
      河野義樹、眞山剛、光原昌寿、山﨑重人、佐藤満弘
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多結晶αTiにおけるひずみ局所化機構のイメージベース結晶塑性解析2019

    • Author(s)
      河野義樹、大橋鉄也、眞山剛、田中將己、佐藤満弘
    • Organizer
      日本機械学会第32回計算力学講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Schmid因子の関数を用いたひずみの空間分布予測手法の開発2019

    • Author(s)
      河野義樹、眞山剛、光原昌寿、佐藤満弘
    • Organizer
      日本機械学会M&M2019材料力学カンファレンス
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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