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Understanding nucleation/growth mechanism of deformation twins using in-situ picoindentation technique

Research Project

Project/Area Number 25420765
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural/Functional materials
Research InstitutionNational Institute for Materials Science

Principal Investigator

Somekawa Hidetoshi  国立研究開発法人物質・材料研究機構, 元素戦略材料センター, 主幹研究員 (50391222)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsマグネシウム / 材料工学 / 変形双晶 / 溶質元素 / 結晶粒界 / インデンテーション / 双晶 / ナノインデンテーション / 粒界 / その場観察
Outline of Final Research Achievements

The driving force for {10-12}-type deformation twins nucleation was found to be much higher than that of (basal-type) dislocation formation. The nucleation site for deformation twins in poly-crystalline magnesium is likely to be mainly grain boundary; in particular grain boundary, which has a high grain boundary energy, readily become the nucleation site. The alloying element does not affect the nucleation site, but does the volume fraction of twin formation. These results reveal that grain boundary control, e.g., grain boundary segregation, leads to the prevention or enhancement of twin formation. As for the single-crystalline magnesium, the point defect, such as the vacancy, became the nucleation site for deformation twins.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (20 results)

All 2016 2015 2014 2013 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Acknowledgement Compliant: 4 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Remarks (3 results)

  • [Int'l Joint Research] マサチューセッツ工科大学(米国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Effect of crystal orientation on nanoindentation behavior in magnesium2016

    • Author(s)
      H. Somekawa and C. A. Schuh
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 47 Issue: 6 Pages: 1-8

    • DOI

      10.1007/s11661-016-3479-6

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Hall Petch breakdown in fine-grained pure magnesium at low strain rates2015

    • Author(s)
      H. Somekawa and T. Mukai
    • Journal Title

      Metallurgical and Materials Transaction A

      Volume: 46 Issue: 2 Pages: 894-902

    • DOI

      10.1007/s11661-014-2641-2

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effect of deformation twin on toughness in magnesium binary alloys2015

    • Author(s)
      H. Somekawa, T. Inoue, K. Tsuzaki
    • Journal Title

      Philosophical Magazine

      Volume: 95 Pages: 2513-2526

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Crack propagation behavior in magnesium binary alloys2014

    • Author(s)
      H. Somekawa, A. Singh, T. Inoue and K. Tsuzaki
    • Journal Title

      Philosophical Magazine

      Volume: 94 Issue: 29 Pages: 3317-3330

    • DOI

      10.1080/14786435.2014.956840

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] ナノインデンテーション法によるマグネシウム合金の塑性特性評価2013

    • Author(s)
      染川英俊
    • Journal Title

      科学と工業

      Volume: 87 Pages: 421-427

    • NAID

      40019903811

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] インデンテーション挙動に及ぼす変形双晶の影響2016

    • Author(s)
      染川英俊, C. A. Schuh
    • Organizer
      2016年日本機械学会年次大会
    • Place of Presentation
      九州大学
    • Year and Date
      2016-09-11
    • Related Report
      2015 Annual Research Report
  • [Presentation] Effect of alloying element on fracture toughness in magnesium binary alloys2016

    • Author(s)
      H. Somekawa, T. Inoue, K. Tsuzaki
    • Organizer
      PRICM9
    • Place of Presentation
      Kyoto International Conference Center
    • Year and Date
      2016-08-01
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マグネシウムの力学特性2016

    • Author(s)
      染川英俊
    • Organizer
      日本金属学会2016年春期大会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2016-03-23
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] マグネシウムのインデンテーション変形応答2015

    • Author(s)
      染川英俊, C. A. Schuh
    • Organizer
      M&M2015材料力学カンファレンス
    • Place of Presentation
      慶応大学
    • Year and Date
      2015-11-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] マグネシウム合金の強度・靱性・延性に及ぼす溶質元素の影響2015

    • Author(s)
      染川英俊
    • Organizer
      日本金属学会2015年秋期大会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Effect of solid solution alloying on grain boundary sliding in magnesium binary alloys2015

    • Author(s)
      H. Somekawa, H. Watanabe, T. Mukai
    • Organizer
      ICSAM2015
    • Place of Presentation
      The University of Tokyo
    • Year and Date
      2015-09-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マグネシウム合金の破壊靱性と双晶2015

    • Author(s)
      染川英俊
    • Organizer
      第59回高性能Mg合金創成加工研究会
    • Place of Presentation
      熊本大学
    • Year and Date
      2015-08-24
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] 微細結晶粒マグネシウム合金の靭性に及ぼす溶質元素の影響2014

    • Author(s)
      染川英俊, 井上忠信, 津﨑兼彰
    • Organizer
      日本金属学会2014年秋期大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Research-status Report
  • [Presentation] HCP金属のナノインデンテーション応答に及ぼす集合組織の影響2014

    • Author(s)
      染川英俊, C. A. Schuh
    • Organizer
      日本機械学会2014年年次大会
    • Place of Presentation
      東京電機大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] マグネシウム合金の粒界強化・脆化機構に及ぼす溶質元素の影響2014

    • Author(s)
      染川英俊, 井上忠信, 津﨑兼彰
    • Organizer
      日本材料学会第63期学術講演会
    • Place of Presentation
      福岡大学
    • Year and Date
      2014-05-16 – 2014-05-18
    • Related Report
      2014 Research-status Report
  • [Presentation] ナノインデンテーションによる微細結晶粒マグネシウム合金の塑性変形応答2013

    • Author(s)
      染川英俊, Christopher A Schuh
    • Organizer
      2013年度日本機械学会年次大会
    • Place of Presentation
      岡山大学
    • Related Report
      2013 Research-status Report
  • [Remarks] NIMS Researchers Database Samurai

    • URL

      http://samurai.nims.go.jp/SOMEKAWA_Hidetoshi-j.html

    • Related Report
      2015 Annual Research Report
  • [Remarks] NIMS Researchers Database

    • URL

      http://samurai.nims.go.jp/SOMEKAWA_Hidetoshi-j.html

    • Related Report
      2014 Research-status Report
  • [Remarks] NIMS Researchers Database

    • URL

      http://samurai.nims.go.jp/SOMEKAWA_Hidetoshi-j.html

    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2022-01-27  

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