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Study on fracture toughness unifying nanomaterials science and micro fracture mechanics.

Research Project

Project/Area Number 26249106
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionSasebo National College of Technology (2016-2017)
Kyushu University (2014-2015)

Principal Investigator

Higashida Kenji  佐世保工業高等専門学校, その他, 校長 (70156561)

Co-Investigator(Kenkyū-buntansha) 田中 將己  九州大学, 工学研究院, 准教授 (40452809)
森川 龍哉  九州大学, 工学研究院, 助教 (00274506)
定松 直  鹿児島大学, 理工学域工学系, 助教 (10709554)
Co-Investigator(Renkei-kenkyūsha) MATSUMURA Syo  九州大学, 工学研究院, 教授 (60150520)
SHIMOKAWA Tomotsugu  金沢大学, 理工研究域, 教授 (40361977)
YAMAGUCHI Masatake  原子力研究開発機構, システム計算科学センター, 研究員 (50360417)
Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2015: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2014: ¥22,490,000 (Direct Cost: ¥17,300,000、Indirect Cost: ¥5,190,000)
Keywords破壊 / 転位 / 靭性 / 構造・機能材料 / 機能・構造材料 / 電子顕微鏡 / 強度・破壊靭性
Outline of Final Research Achievements

Cracks were introduced on a specimen cut from a {011} silicon wafer by using a Vickers indenter. The sample was heated in order to introduce dislocations at the crack tip. The crack tip dislocations were observed by using high-voltage electron microscope, determining both three-dimensional structures and Burgers vectors of the dislocations at the crack tip. It was found that those dislocations shield the crack tip efficiently, which increases fracture toughness. In addition to that, the activation energy for controlling process of the brittle-to-ductile transition temperature was measured from the dependence of the transition temperature on the deformation rate. It was found the value is close to that of dislocation glide at 50K in the condition of the strain rate employed in the tensile tests performed in this study.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (18 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 1 results) Presentation (13 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results) Book (1 results)

  • [Journal Article] Crack-tip Dislocations and Brittle-to-Ductile Transition2017

    • Author(s)
      田中 將己、定松 直、東田 賢二
    • Journal Title

      Materia Japan

      Volume: 56 Issue: 10 Pages: 597-603

    • DOI

      10.2320/materia.56.597

    • NAID

      130006109915

    • ISSN
      1340-2625, 1884-5843
    • Related Report
      2017 Annual Research Report
  • [Journal Article] Transmission electron microscopy of bulk specimens over 10 μm in thickness2016

    • Author(s)
      S. Sadamatsu, M. Tanaka, K. Higashida, S. Matsumura
    • Journal Title

      Ultramicroscopy

      Volume: 162 Pages: 10-16

    • DOI

      10.1016/j.ultramic.2015.09.001

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Observation of Dislocations in Thick Specimens Using by The High-Voltage Electron Microscopy with an Energy Filter2016

    • Author(s)
      定松直, 田中將己, 東田賢二, 松村晶
    • Journal Title

      Materia Japan

      Volume: 55 Issue: 12 Pages: 597-597

    • DOI

      10.2320/materia.55.597

    • NAID

      130005170145

    • ISSN
      1340-2625, 1884-5843
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strain Field Around Lomer Sessile Dislocations in Silicon Measured using Geometric Phase Analysis2015

    • Author(s)
      D.R. Adhika, M. Tanaka, T. Yamamoto and K. Higashida
    • Journal Title

      Transactions of the Materials Research Society of Japan

      Volume: 40 Issue: 3 Pages: 227-233

    • DOI

      10.14723/tmrsj.40.227

    • NAID

      130005096531

    • ISSN
      1382-3469, 2188-1650
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fe-Ni合金のマルテンサイト変態で生じた局所ひずみ分布に及ぼす水素の影響2017

    • Author(s)
      加藤遼馬, 中村直人, 森川龍哉, 田中將己, 東田賢二
    • Organizer
      日本鉄鋼協会174回秋季講演大会北海度大学
    • Related Report
      2017 Annual Research Report
  • [Presentation] Thermally activated process of dislocation gliding at low temperatures in severely deformed metals2017

    • Author(s)
      M. Tanaka, T. Morikawa, K. Higashida
    • Organizer
      The 15th International Conference on Advanced Materials
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 金属塑性の理解とモデリング2017

    • Author(s)
      東田賢二, 田中將己
    • Organizer
      金属塑性の理解とモデリング
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 単結晶マイクロ試験片を用いた臨界分解剪断応力評価2016

    • Author(s)
      カロカロハルナス, 藤崎基, 田中將己, 森川龍哉, 東田賢二
    • Organizer
      日本鉄鋼協会第172回秋季講演大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] Local slip deformation along micropillars in Fe-Al single crystals.2016

    • Author(s)
      K. Harnas, M. Tanaka, K. Higashida
    • Organizer
      9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9
    • Place of Presentation
      京都国際センター
    • Year and Date
      2016-09-20
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単結晶マイクロ試験片を用いた力学特性評価2016

    • Author(s)
      カロカロハルナス, 藤崎基, 田中將己, 森川龍哉, 東田賢二,
    • Organizer
      日本金属学会九州支部・日本鉄鋼協会九州支部・軽金属学会九州支部平成28年度合同学術講演大会
    • Place of Presentation
      九州大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] Understanding fracture toughness based on dislocation behaviors2015

    • Author(s)
      K. Higashida and M. Tanaka
    • Organizer
      Asia Steel International Conference (Asia Steel 2015)
    • Place of Presentation
      Yokohama
    • Year and Date
      2015-10-05
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Czシリコン単結晶における水素起因欠陥の発生メカニズム2015

    • Author(s)
      高田康祐, 杉村渉, 田中將己, 東田賢二
    • Organizer
      日本金属学会2014年秋期講演大会(第157回)
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-18
    • Related Report
      2015 Annual Research Report
  • [Presentation] HVEM-tomography for crack tip dislocations2015

    • Author(s)
      M. Tanaka and K. Higashida
    • Organizer
      17th International Conference on the Strength of Materials (ICSMA17)
    • Place of Presentation
      Czech Republic
    • Year and Date
      2015-08-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超高圧電子顕微鏡によるSi結晶中の亀裂先端転位三次元構造解析2015

    • Author(s)
      田中將己, 定松直, 東田賢二
    • Organizer
      日本学術振興会第161委員会第90回研究会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-03-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] 超高圧電子顕微鏡を利用した亀裂先端における転位増殖機構の解明2014

    • Author(s)
      田中大樹, 高田康祐, 田中將己, 東田賢二
    • Organizer
      第56回日本顕微鏡学会九州支部学術講演会
    • Place of Presentation
      宮崎市民プラザ
    • Year and Date
      2014-12-16
    • Related Report
      2014 Annual Research Report
  • [Presentation] Toward connecting dislocation behaviours with materials fracture2014

    • Author(s)
      K. Higashida, M. Tanaka
    • Organizer
      The 4th International Symposium on Steel Science (ISSS2014)
    • Place of Presentation
      Kansai Seminar House
    • Year and Date
      2014-11-03 – 2014-11-06
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] 超高圧電子顕微鏡による亀裂先端の転位観察2014

    • Author(s)
      田中大樹, 高田康祐, 田中將己, 森川龍哉, 東田賢二
    • Organizer
      日本金属学会2014年秋季講演大会(第155回)
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Book] しなやかで強い鉄鋼材料(分担)2016

    • Author(s)
      東田賢二, 田中將己
    • Total Pages
      8
    • Publisher
      エヌ・ティー・エス
    • Related Report
      2016 Annual Research Report

URL: 

Published: 2014-04-04   Modified: 2019-03-29  

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