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Low-temperature deformability of brittle materials - New materials properties that can appear only for small volumes

Research Project

Project/Area Number 26630346
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural/Functional materials
Research InstitutionKyoto University

Principal Investigator

INUI HARUYUKI  京都大学, 工学(系)研究科(研究院), 教授 (30213135)

Project Period (FY) 2014-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords協調的原子集団励起 / プラストン / マイクロピラー / 試験片サイズ依存性 / 臨界体積 / 転位 / 核生成 / 収縮転位 / パイエルス機構
Outline of Final Research Achievements

Plastic deformation is observed by slip along the a-axis direction on basal planes even at room temperature when the specimen size is small of the order of micron meters in single crystals of 6H-SiC, in which high temperatures, at least 1000°C, are usually needed to induce plastic deformation in bulk specimens. In micropillar specimens, basal slip is observed to occur accompanied by a very high critical resolved shear stress (CRSS) above 5 GPa. Of significance to note is that these CRSS values do not depends much on specimen size up to sub-micron meters. Room temperature deformation was similarly observed in transition-metal silicides. These facts may indicate that (1) a deformation mechanism different from that observed in bulk at high temperatures can operate in micropillars at low temperatures and that (2) the observed CRSS values correspond to the nucleation stress for dislocations responsible for the new deformation mechanism.

Report

(2 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (19 results)

All 2015 2014

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 4 results) Presentation (15 results) (of which Invited: 4 results)

  • [Journal Article] Planar Defects and Dislocations in Transition-Metal Disilicides2015

    • Author(s)
      V. Paidar, M. Cak, M. Sob and H. Inui
    • Journal Title

      Intermetallics

      Volume: 58 Pages: 43-49

    • DOI

      10.1016/j.intermet.2014.11.003

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Compression of Single-Crystal Micropillars of the Γ Intermetallic Phase in the Fe-Zn System2014

    • Author(s)
      Masahiro Inomoto, Norihiko L. Okamoto, and Haruyuki Inui
    • Journal Title

      Advanced Materials Research

      Volume: 922 Pages: 264-269

    • DOI

      10.4028/www.scientific.net/amr.922.264

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Micropillar Compression Deformation of Single Crystals of the Intermetallic Compound ζ-FeZn132014

    • Author(s)
      Norihiko L. Okamoto, Masahiro Inomoto, Hiroki Adachi, Hiroshi Takebayashi, and Haruyuki Inui
    • Journal Title

      Acta Materialia

      Volume: 65 Pages: 229-239

    • DOI

      10.1016/j.actamat.2013.10.065

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Specimen- and Grain-Size Dependence of Compression Deformation Behavior in Nanocrystalline Copper2014

    • Author(s)
      Norihiko L. Okamoto, Daisuke Kashioka, Tetsuji Hiratoh, and Haruyuki Inui
    • Journal Title

      International Journal of Plasticity

      Volume: 56 Pages: 173-183

    • DOI

      10.1016/j.ijplas.2013.12.003

    • NAID

      120005434967

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 硬質材料単結晶マイクロピラーの圧縮変形挙動2015

    • Author(s)
      新貝 康晴, 岸田 恭輔, 乾 晴行
    • Organizer
      日本金属学会春期(第156回)大会
    • Place of Presentation
      東京大学
    • Year and Date
      2015-03-18 – 2015-03-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] L12型Co3(Al,W)の単結晶マイクロピラー圧縮試験2015

    • Author(s)
      陳 正昊, 岡本 範彦, 乾 晴行
    • Organizer
      日本金属学会春期(第156回)大会
    • Place of Presentation
      東京大学
    • Year and Date
      2015-03-18 – 2015-03-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] GA鋼板めっき被膜を構成するFe-Zn系金属間化合物単相/複相マイクロ試料の塑性・破壊挙動解析2015

    • Author(s)
      道下 勝太, 岡本 範彦, 乾 晴行
    • Organizer
      日本金属学会春期(第156回)大会
    • Place of Presentation
      東京大学
    • Year and Date
      2015-03-18 – 2015-03-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] Micropillar Compression Deformation of Single Crystals of Fe-Zn Intermetallic Compounds Constituting the Coating Layer of Galvannealed Steels2014

    • Author(s)
      Norihiko L. Okamoto, Masahiro Inomoto, Haruyuki Inui
    • Organizer
      2014 MRS Fall Meeting & Exhibit
    • Place of Presentation
      Boston, MA, U.S.A
    • Year and Date
      2014-11-30 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Structure of Planar Defects and Their Impact on Dislocation Core Configurations in Transition-Metal Disilicides2014

    • Author(s)
      Vaclav Paidar, Miroslav Cak, Mojmir Sob, Haruyuki Inui
    • Organizer
      2014 MRS Fall Meeting & Exhibit
    • Place of Presentation
      Boston, MA, U.S.A
    • Year and Date
      2014-11-30 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Microstructures and Mechanical Properties of MoSi2 / Mo5Si3 / Mo5Si3C Ternary Eutectic Composite2014

    • Author(s)
      Hirotaka Matsunoshita, Kosuke Fujiwara, Yuta Sasai, Yuichiro Kondo, Kyosuke Kisida, Haruyuki Inui
    • Organizer
      2014 MRS Fall Meeting & Exhibit
    • Place of Presentation
      Boston, MA, U.S.A
    • Year and Date
      2014-11-30 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Micropillar Compression of MoSi2 Single Crystals2014

    • Author(s)
      S. Nakatsuka, K. Kishida, H. Inui
    • Organizer
      2014 MRS Fall Meeting & Exhibit
    • Place of Presentation
      Boston, MA, U.S.A
    • Year and Date
      2014-11-30 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] C11b型およびC40型遷移金属ダイシリサイド単結晶のマイクロピラー圧縮変形2014

    • Author(s)
      中塚 怜志, 岸田 恭介, 乾 晴行
    • Organizer
      日本金属学会秋期(第155回)大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ti3Al単結晶マイクロピラーの圧縮試験2014

    • Author(s)
      松本 淳史, 岸田 恭輔, 乾 晴行
    • Organizer
      日本金属学会秋期(第155回)大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Fe-Zn系金属間化合物複相マイクロピラーの圧縮試験その場観察2014

    • Author(s)
      道下 勝太, 岡本 範彦, 乾 晴行
    • Organizer
      日本金属学会秋期(第155回)大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] 6H-SiC単結晶マイクロピラーの圧縮変形挙動2014

    • Author(s)
      新貝 康晴, 中塚 怜志, 中原 基希, 岸田 恭輔, 乾 晴行
    • Organizer
      日本金属学会秋期(第155回)大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] GA鋼板のめっき被膜を構成するFe-Zn系金属間化合物の結晶構造と力学特性2014

    • Author(s)
      岡本 範彦
    • Organizer
      日本金属学会秋期(第155回)大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Plasticity of Transition-Metal Silicides with C11b and Its Derivative Structures at Different Length Scales2014

    • Author(s)
      H. Inui
    • Organizer
      Czech-Japanese Workshop on High-Temperature Intermetallics
    • Place of Presentation
      Brno, Czech
    • Year and Date
      2014-09-13 – 2014-09-16
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Single crystal mechanical properties of complex materials2014

    • Author(s)
      Haruyuki Inui
    • Organizer
      Compositionally Complex Alloys 2014
    • Place of Presentation
      Munich, Germany
    • Year and Date
      2014-07-15 – 2014-07-18
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Micropillar Compression Testing as a Vehicle to Understand Deformation Behavior and Mechanism of Materials2014

    • Author(s)
      H. Inui
    • Organizer
      International Workshop on Deformation, Damage and Life Prediction of Structural Materials
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      2014-06-23 – 2014-06-24
    • Related Report
      2014 Annual Research Report
    • Invited

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Published: 2014-04-04   Modified: 2016-06-03  

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