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Deformation mechanisms of hard mateials by non-conventional dislocation motion involving cooperative atomic shuffling

Research Project

Project/Area Number 20K21084
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 InstitutionKyoto University

Principal Investigator

Kishida Kyosuke  京都大学, 工学研究科, 准教授 (20354178)

Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords変形機構 / 転位 / 硬質材料 / 協調原子運動 / 脆性金属間化合物 / マイクロピラー試験 / 力学特性
Outline of Research at the Start

硬質結晶性材料は各種構造材料の強化相としての応用が期待されているが,その本質的な力学特性に関しては不明な点が多い.本研究では新規機械試験法である単結晶マイクロピラー圧縮試験法をセメンタイト相やFe-Cr系σ相をはじめとする各種硬質結晶性材料に適用することにより,これまで塑性変形が実質不可能と考えられてきた各種硬質結晶性材料の室温塑性変形挙動の詳細を明らかにする.さらに研究代表者がセメンタイト相やFe-Cr系σ相において独自に見出した特異な転位の運動による塑性変形の詳細について,最新の電子顕微鏡法を駆使した詳細な解析,第一原理計算による理論的検討を行い,そのメカニズムの解明を目指す.

Outline of Final Research Achievements

Room temperature deformation behavior of hard crystals with complex crystal structure, including Fe-Cr sigma phase and transition metal silicides, has been investigated by micropillar compression method. Operative deformation modes and their critical resolved shear stress for most materials investigated have been identified successfully. In Fe-Cr sigma phase, the activation of non-conventional slip by the motion of so-called zonal dislocations has been experimentally confirmed for the first time through the direct observation of the dislocation core structure by the atomic resolution electron microscopy. Atomic shuffling model in the dislocation core region has been proposed based on the observation. Knowledge gained on the dislocation core structure will lead to improved understanding of deformation mechanisms in this and other complex crystal structures and provide ways to improve the brittleness of these complex materials.

Academic Significance and Societal Importance of the Research Achievements

本研究で得たFe-Cr系σ相における特異な転位の転位芯構造に関する知見はこの材料だけでなく,これまで実験的証拠の欠如のため十分に検討されてこなかった他の複雑構造を有する結晶性材料の変形機構の理解を深化させることにつながるため,学術的に非常に重要で意義がある.また本研究で得た他の硬質材料の室温塑性変形に関する結果とともに,各種硬質結晶材料の各種構造材料の強化相としての実用化の際の問題の一つである室温脆性の改善策の提案にもつながる重要な知見であるため,工業的・社会的にも十分に意義がある.

Report

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

    (31 results)

All 2022 2021 2020 Other

All Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (20 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results) Remarks (3 results)

  • [Journal Article] Room-temperature deformation of single crystals of transition-metal disilicides (TMSi2) with the C11b (TM?=?Mo) and C40 (TM?=?V, Cr, Nb and Ta) structures investigated by micropillar compression2022

    • Author(s)
      Kishida Kyosuke、Nakatsuka Satoshi、Nose Hiroaki、Inui Haruyuki
    • Journal Title

      Acta Materialia

      Volume: 223 Pages: 117468-117468

    • DOI

      10.1016/j.actamat.2021.117468

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Direct observation of zonal dislocation in complex materials by atomic-resolution scanning transmission electron microscopy2022

    • Author(s)
      Kishida Kyosuke、Okutani Masaomi、Inui Haruyuki
    • Journal Title

      Acta Materialia

      Volume: 228 Pages: 117756-117756

    • DOI

      10.1016/j.actamat.2022.117756

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Proposing the Concept of Plaston and Strategy to Manage Both High Strength and Large Ductility in Advanced Structural Materials, on the Basis of Unique Mechanical Properties of Bulk Nanostructured Metals2022

    • Author(s)
      Tsuji Nobuhiro、Ogata Shigenobu、Inui Haruyuki、Tanaka Isao、Kishida Kyosuke
    • Journal Title

      The Plaston Concept

      Volume: - Pages: 3-34

    • DOI

      10.1007/978-981-16-7715-1_1

    • ISBN
      9789811677144, 9789811677151
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Plaston?Elemental Deformation Process Involving Cooperative Atom Motion2022

    • Author(s)
      Inui Haruyuki、Kishida Kyosuke
    • Journal Title

      The Plaston Concept

      Volume: - Pages: 119-131

    • DOI

      10.1007/978-981-16-7715-1_6

    • ISBN
      9789811677144, 9789811677151
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uniaxial mechanical properties of face-centered cubic single- and multiphase high-entropy alloys2022

    • Author(s)
      Inui Haruyuki、Kishida Kyosuke、Li Le、Manzoni Anna Maria、Haas Sebastian、Glatzel Uwe
    • Journal Title

      MRS Bulletin

      Volume: 2 Issue: 2 Pages: 1-7

    • DOI

      10.1557/s43577-022-00280-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Room-temperature deformation of single crystals of ZrB2 and TiB2 with the hexagonal AlB2 structure investigated by micropillar compression2021

    • Author(s)
      Chen Zhenghao、Paul Bhaskar、Majumdar Sanjib、Okamoto Norihiko L.、Kishida Kyosuke、Inui Haruyuki、Otani Shigeki
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 14265-14265

    • DOI

      10.1038/s41598-021-93693-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Room temperature deformation of single crystals of Ti5Si3 with the hexagonal D88 structure investigated by micropillar compression tests2020

    • Author(s)
      Kishida Kyosuke、Fukuyama Takayoshi、Maruyama Takuto、Inui Haruyuki
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 17983-17983

    • DOI

      10.1038/s41598-020-75007-7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Micropillar compression deformation of single crystals of α-Nb5Si3 with the tetragonal D8l structure2020

    • Author(s)
      Kishida Kyosuke、Maruyama Takuto、Fukuyama Takayoshi、Inui Haruyuki
    • Journal Title

      Science and Technology of Advanced Materials

      Volume: 21 Issue: 1 Pages: 805-816

    • DOI

      10.1080/14686996.2020.1855065

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] マイクロ機械試験と電子顕微鏡観察による層状化合物の塑性変形解析2022

    • Author(s)
      岸田恭輔
    • Organizer
      令和3年度 第二回軽金属学会「LPSO/MFS構造材料研究部会」第82回高性能Mg合金創成加工研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Cr23C6単結晶マイクロピラーの室温圧縮変形2022

    • Author(s)
      伊藤充洋, 岸田恭輔, 乾 晴行
    • Organizer
      日本金属学会2022年春期(第170回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] TWIP鋼単結晶マイクロピラーにおける変形双晶形成条件2022

    • Author(s)
      Qi Xing, 岸田恭輔, 野瀬浩晃, 乾 晴行, 辻 伸泰
    • Organizer
      日本金属学会2022年春期(第170回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fe-Cr系σ相におけるZonal転位の転位芯構造2022

    • Author(s)
      鈴木広崇, 奥谷将臣, 岸田恭輔, 乾 晴行
    • Organizer
      日本金属学会2022年春期(第170回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Micropillar compression deformation of transition-metal disilicides with the C11b and C40 structures2021

    • Author(s)
      Kyosuke Kishida, Haruyuki Inui
    • Organizer
      11th International Conference on Processing & Manufacturing of Advanced Materials (THERMEC’ 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cr23C6単結晶マイクロピラーの圧縮変形挙動2021

    • Author(s)
      伊藤充洋, 岸田恭輔, 乾 晴行
    • 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] Mn-Zn-Y LPSO相単結晶マイクロピラーにおけるキンク帯形成条件2021

    • Author(s)
      岸田恭輔, 大影晃平, 乾 晴行
    • 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-Mn単結晶の室温変形挙動2021

    • Author(s)
      鈴木広崇, 奥谷将臣, 岸田恭輔, 乾 晴行
    • 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] Room temperature plastic deformation of hard and brittle crystals investigated by micropillar compression method2021

    • Author(s)
      H. Suzuki, M. Okutani, K. Kishida, H. Inui
    • Organizer
      Intermetallics 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マイクロ機械試験で探るセメンタイトおよびパーライト単結晶の力学特性2021

    • Author(s)
      岸田恭輔,乾 晴行
    • Organizer
      ISSS 2021ポストシンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 6H-SiC単結晶の室温塑性変形挙動2021

    • Author(s)
      岸田恭輔, 乾 晴行
    • Organizer
      日本金属学会2021年春期(第168回)講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Mo添加NbSi2/Nb5Si3共晶合金の微細組織と力学特性2021

    • Author(s)
      上村 遙, 岸田 恭輔, 乾 晴行
    • Organizer
      日本金属学会2021年春期(第168回)講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] α-Mn単結晶マイクロピラーの圧縮変形挙動2021

    • Author(s)
      鈴木 広崇, 奥谷 将臣, 岸田 恭輔, 乾 晴行
    • Organizer
      日本金属学会2021年春期(第168回)講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] D8l型構造を有する遷移金属シリサイド単結晶の室温変形挙動2020

    • Author(s)
      岸田 恭輔,乾 晴行
    • 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] Mo添加NbSi2/Nb5Si3一方向凝固共晶合金の微細組織2020

    • Author(s)
      上村 遥,岸田 恭輔,乾 晴行
    • 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] セメンタイト単結晶マイクロピラーの圧縮変形組織2020

    • Author(s)
      森下 文寛,門田 信幸,岸田 恭輔,乾 晴行
    • 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] Mg-Zn-Y LPSO 相単結晶におけるキンク組織形成条件2020

    • Author(s)
      大影 晃平,岸田 恭輔,乾 晴行
    • 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] Micropillar Compression Deformation of Transition-Metal Disilicides with the C40 Structure2020

    • Author(s)
      Kyosuke Kishida, Haruyuki Inui
    • Organizer
      2020 MRS Virtual Spring/Fall Meeting & Exhibit
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Influences of Loading Axis Orientation and Specimen Shape on Kink-Band Formation in Single Crystals of Mg-Zn-Y LPSO Phase Investigated by Micropillar Compression Tests2020

    • Author(s)
      Kohei Okage, Kyosuke Kishida, Haruyuki Inui
    • Organizer
      2020 MRS Virtual Spring/Fall Meeting & Exhibit
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microstructure and Crystallographic Orientation Relationships in Directionally Solidified NbSi2/Nb5Si3 Eutectic Composites with Mo Addition2020

    • Author(s)
      Haruka Uemura, Kosei Takeda, Kyosuke Kishida, Haruyuki Inui
    • Organizer
      2020 MRS Virtual Spring/Fall Meeting & Exhibit
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 京都大学大学院工学研究科材料工学専攻 乾 研究室

    • URL

      http://imc.mtl.kyoto-u.ac.jp/

    • Related Report
      2021 Annual Research Report
  • [Remarks] Researchgate - Kyosuke Kishida

    • URL

      https://www.researchgate.net/profile/Kyosuke_Kishida

    • Related Report
      2021 Annual Research Report
  • [Remarks] 京都大学大学院工学研究科材料工学専攻 乾 研究室のページ

    • URL

      http://imc.mtl.kyoto-u.ac.jp/

    • Related Report
      2020 Research-status Report

URL: 

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

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