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Control of intergranular degradation phenomena in metallic materials based on fractal analysis of grain boundary connectivity

Research Project

Project/Area Number 26420709
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Composite materials/Surface and interface engineering
Research InstitutionAshikaga Institute of Technology

Principal Investigator

KOBAYASHI Shigeaki  足利工業大学, 工学部, 准教授 (00323931)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords粒界工学 / 腐食 / 破壊 / 粒界連結性 / 粒界性格 / 粒界腐食 / フラクタル / ステンレス鋼 / アルミニウム合金 / ニッケル基合金 / 粒界応力腐食割れ
Outline of Final Research Achievements

A new approach to grain boundary engineering based on fractal analysis was investigated to obtain a clue to control the intergranular degradation phenomena in the practical metallic materials. For five kinds of practical alloys which show different microstructure evolution process, it was revealed that the random boundary connectivity where intergranular degradation preferentially propagates can be quantified by the fractal analysis. The intergranular corrosion resistance was improved by lowering fractal dimension of random boundary connectivity. It was demonstrated that the more precise prediction and control of intergranular degradation phenomena can be achieved by the grain boundary engineering based on the fractal analysis of grain boundary connectivity.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (17 results)

All 2017 2016 2015 2014

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Effect of grain boundary character on nucleation of intergranular fatigue cracks in SUS430 ferritic stainless steel2017

    • Author(s)
      楊 蔚涛,小林 重昭,斎藤 栄
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 83 Issue: 847 Pages: 16-00460-16-00460

    • DOI

      10.1299/transjsme.16-00460

    • NAID

      130006320999

    • ISSN
      2187-9761
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] A new approach to grain boundary engineering for nanocrystalline materials2016

    • Author(s)
      S. Kobayashi, S. Tsurekawa, T. Watanabe
    • Journal Title

      Journal of Nanotechnology

      Volume: 7 Pages: 1829-1849

    • DOI

      10.3762/bjnano.7.176

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Control of grain boundary connectivity based on fractal analysis for improvement of intergranular corrosion resistance in SUS316L austenitic stainless steel2016

    • Author(s)
      Shigeaki Kobayashi, Ryosuke Kobayashi, Tadao Watanabe
    • Journal Title

      Acta Materialia

      Volume: 102 Pages: 397-405

    • DOI

      10.1016/j.actamat.2015.08.075

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] SUS304ステンレス鋼の粒界劣化現象に及ぼす粒界連結性の影響2016

    • Author(s)
      小林重昭,小林良輔
    • Organizer
      日本機械学会M&M2016材料力学カンファレンス
    • Place of Presentation
      神戸大学
    • Year and Date
      2016-10-09
    • Related Report
      2016 Annual Research Report
  • [Presentation] 粒界微細組織のフラクタル解析に基づく粒界制御による金薄膜の電気抵抗制御2016

    • Author(s)
      石橋一真,小林重昭
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] 多結晶ニッケルにおけるランダム粒界の幾何学的分布のフラクタル解析とそれに基づく粒界工学による偏析脆性破壊の抑制2016

    • Author(s)
      小林重昭,丸山辰也
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] Effect of grain boundary microstructure on electrical conductivity in gold thin films produced by sputtering and subsequent annealing2016

    • Author(s)
      Shigeaki Kobayashi, Yoshihito Sugiyama, Kazuma Ishibashi
    • Organizer
      THERMEC 2016
    • Place of Presentation
      Graz, Austria
    • Year and Date
      2016-05-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 粒界連結性を考慮した粒界工学に基づく低積層欠陥エネルギー材料の粒界劣化現象の制御2016

    • Author(s)
      小林 重昭、小林 良輔、橋本 龍一
    • Organizer
      日本金属学会春期大会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2016-03-23
    • Related Report
      2015 Research-status Report
  • [Presentation] 多結晶金属材料のフラクタルを用いた粒界連結性の定量化と脆性破壊制御2015

    • Author(s)
      小林 重昭、小林 良輔、橋本 龍一
    • Organizer
      日本機械学会M&M2015材料力学カンファレンス
    • Place of Presentation
      慶応義塾大学
    • Year and Date
      2015-11-21
    • Related Report
      2015 Research-status Report
  • [Presentation] SUS430ステンレス鋼の高サイクル疲労における微視き裂形成に及ぼす結晶粒界の影響2015

    • Author(s)
      Yang Weitao、小林 重昭、齋藤 栄
    • Organizer
      日本機械学会M&M2015材料力学カンファレンス
    • Place of Presentation
      慶応義塾大学
    • Year and Date
      2015-11-21
    • Related Report
      2015 Research-status Report
  • [Presentation] オーステナイト系ステンレス鋼の粒界連結性のフラクタルに基づく評価方法の確立2015

    • Author(s)
      小林 良輔、小林 重昭
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] インコネル600の長寿命化のためのフラクタルに基づく粒界制御プロセスの検討2015

    • Author(s)
      橋本 龍一、小林 重昭
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] SUS430 ステンレス鋼の疲労破壊に及ぼす粒界微細組織の影響2015

    • Author(s)
      Yang Weitao、小林 重昭、齋藤 栄
    • Organizer
      日本機械学会年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-09-14
    • Related Report
      2015 Research-status Report
  • [Presentation] 粒界連結性のフラクタル解析に基づくSUS316Lステンレス鋼の粒界腐食制御2015

    • Author(s)
      小林良輔、小林重昭
    • Organizer
      日本金属学会春期大会
    • Place of Presentation
      東京大学
    • Year and Date
      2015-03-20
    • Related Report
      2014 Research-status Report
  • [Presentation] インコネル600における粒界劣化現象抑制のためのフラクタル解析に基づく粒界工学2015

    • Author(s)
      橋本龍一、林翔太、小林重昭
    • Organizer
      日本金属学会春期大会
    • Place of Presentation
      東京大学
    • Year and Date
      2015-03-20
    • Related Report
      2014 Research-status Report
  • [Presentation] SUS316Lステンレス鋼の粒界連結性の制御による粒界腐食の抑制2014

    • Author(s)
      小林良輔、小林重昭
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24
    • Related Report
      2014 Research-status Report
  • [Presentation] インコネル600のフラクタル解析に基づく粒界連結性の評価と粒界腐食の制御2014

    • Author(s)
      橋本龍一、小林重昭
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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