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Characterization and application of deformation and dissolution behavior of soft particles during plastic deformation in soft particle dispersion strengthening steel

Research Project

Project/Area Number 26289262
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Structural/Functional materials
Research InstitutionKyushu University

Principal Investigator

Tsuchiyama Toshihiro  九州大学, 工学(系)研究科(研究院), 准教授 (40315106)

Co-Investigator(Kenkyū-buntansha) 赤間 大地  九州大学, 工学(系)研究科(研究院), 研究員 (80612118)
中田 伸生  九州大学, 工学(系)研究科(研究院), 助教 (50380580)
Co-Investigator(Renkei-kenkyūsha) HATA Satoshi  九州大学, 大学院総合理工学研究院, 教授 (60264107)
MOROOKA Satoshi  首都大学東京, システムデザイン研究会, 助教 (10534422)
MUNETO Shinji  九州大学, 大学院工学研究院, 准教授 (20380587)
Research Collaborator MURAYAMA Mitsuhiro  バージニア工科大学
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Keywords粒子分散強化 / 延性破壊 / 加工硬化 / 塑性加工 / ボイド生成 / 局部伸び / 軟質粒子 / 塑性変形 / FE-SEM / 加工軟化 / 延性 / 転位密度 / 構造・機能材料 / 機械的性質 / 鉄鋼材料 / 析出強化 / 強ひずみ加工 / 電気抵抗 / 軟質粒子分散鋼 / Cu粒子 / 析出 / 分解 / 不均一変形 / ナノボイド
Outline of Final Research Achievements

Among the dispersion particles used for strengthening steel, Cu particles, which are softer than iron matrix, were investigated in terms of their role in deformation and fracture of ferritic steel. In general, hard dispersion particles such as carbide and nitride induce ductile fracture originated at these particles, and thus, hard particles tend to reduce the ductility of steel although they are effective for strengthening. However, it was revealed that the soft Cu particles increase strength without reducing ductility too much. The superior mechanical property was explained by the mechanism that the soft particles undergo plastic deformation or dissolution in high strain regime during cold working, which leads to relaxation of stress/strain concentration at the particle interfaces. The results obtained indicates an important guideline for further strengthening of steels.

Report

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

Research Products

(10 results)

All 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Int'l Joint Research] Virginia Tech(米国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Plastic deformation and dissolution of ε-Cu particles by cold rolling in an over-aged particle dispersion strengthening Fe-2mass%Cu alloy2016

    • Author(s)
      Toshihiro Tsuchiyama, Shinji Yamamoto, Satoshi Hata, Mitsuhiro Murayama, Satoshi Morooka, Setsuo Takaki
    • Journal Title

      Acta Materialia

      Volume: 113 Pages: 48-55

    • DOI

      10.1016/j.actamat.2016.03.018

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Deformation and ductile fracture behaviors of a ferritic steel strengthened by Cu dispersion particles2016

    • Author(s)
      Toshihiro Tsuichiyama, Michiharu Asano, Izumi Shimoji, Setsuo Takaki
    • Organizer
      PRICM 9
    • Place of Presentation
      京都国際会議場
    • Year and Date
      2016-08-01
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Dissolution of Cu dispersion particles during severe plastic deformation and its effect on mechanical property of aged Fe-Cu binary alloy2016

    • Author(s)
      Michiharu Asano, Toshihiro Tsuichiyama, Setsuo Takaki
    • Organizer
      PRICM 9
    • Place of Presentation
      京都国際会議場
    • Year and Date
      2016-08-01
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dissolution of Cu dispersion particles during severe plastic deformation and its effect on mechanical property of aged Fe-Cu binary alloy2016

    • Author(s)
      M. Asano, S. Araki, D. Akama, T. Tsuchiyama, S. Takaki
    • Organizer
      PRICM 2016
    • Place of Presentation
      Kyoto
    • Year and Date
      2016-08-01
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Deformation and ductile fracture behaviors of a ferritic steel strengthened by Cu dispersion particles2016

    • Author(s)
      T. Tsuchiyama, M. Asano, I. Shimoji, S. Takaki
    • Organizer
      PRICM 2016
    • Place of Presentation
      Kyoto
    • Year and Date
      2016-08-01
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fe-Cu合金の強ひずみ域における析出Cu粒子の分解2016

    • Author(s)
      浅野道春、荒木理、赤間大地、土山聡宏、高木節雄、高橋 淳、潮田浩作
    • Organizer
      日本鉄鋼協会 第171回春季講演大会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2016-03-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] Fe-Cu合金における析出Cu粒子の冷間圧延に伴う再固溶現象の定量評価2015

    • Author(s)
      浅野道春、荒木理、赤間大地、土山聡宏、高木節雄
    • Organizer
      日本鉄鋼協会 日本金属学会 平成28年度合同学術講演会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-06
    • Related Report
      2015 Annual Research Report
  • [Presentation] 中性子小角散乱法を用いた鋼中軟質分散Cu粒子の定量的観測2015

    • Author(s)
      諸岡聡、土山聡宏、大場洋次郎
    • Organizer
      第6回中性子小角散乱解析法研究会
    • Place of Presentation
      京都大学東京オフィス
    • Year and Date
      2015-03-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] 硬質炭化物粒子および軟質Cu粒子分散鋼における粒子起点ナノボイド形成と延性破壊挙動2014

    • Author(s)
      下地いずみ、赤間大地、中田伸生、土山聡宏、高木節雄
    • Organizer
      日本鉄鋼協会 第168回秋季講演大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report

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Published: 2014-04-04   Modified: 2022-01-27  

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