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High strength and high conductivity nanoparticle-precipitated copper ally : optimizaiton of thermomechanical processing

Research Project

Project/Area Number 15560601
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionTokyo Institute of Technology

Principal Investigator

FUJII Toshiyuki  Tokyo Institute of Technology, Interdisciplinary Craduate School of Science and Engineering, Associate Professor, 大学院・総合理工学研究科, 助教授 (40251665)

Co-Investigator(Kenkyū-buntansha) ONAKA Susumu  Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (40194576)
KATO Masaharu  Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (50161120)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2005: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsprecipitation hardening / crystallographic orientation relationship / invariant line / yield stress / high resolution electron microscopy / particle shape / age hardening / 時効析出 / 不変線 / 降伏点降下現象 / ナノ粒子 / 粒子形態 / 形状安定性 / 分散強化 / 高導電性Cu基合金 / 加工熱処理 / 飽和磁化 / 磁気異方性
Research Abstract

Crystallography and morphology of precipitate particles in Cu-Fe-Co, Cu-Co-Cr and Cu-Ni-Si alloys were investigated. From experiments using Cu-Fe-Co alloys, it has been found that fcc Fe-Co particles transform into bcc particles by applying magnetic field. Transformability of the particles strongly depends on the particle size, cooling rate and the composition of the particles. It has been found that the magnetic field is useful to control microstructures without any deformation of a specimen.
Through extensive investigation using Cu-Ni-Si alloys, it has been found that the crystallographic orientation relationship between Ni_2Si precipitate particles and a Cu matrix, (110)_<Cu>//(001)_<Ni2Si>, [001]_<Cu>//[010] _<Ni2Si>, is satisfied. The Ni_2Si particles tend to grow along the invariant-line direction. The strength is strongly affected by not only the size but also the shape of particles. The elongated shape of the particles results in retarding the peak aging time. We concluded that we are able to obtain the optimum aging condition for the maximum strength with precise consideration of the shape of particles.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (13 results)

All 2005 2004 2003 Other

All Journal Article (11 results) Publications (2 results)

  • [Journal Article] Morphological stability of inclusions : two-dimensional analysis with a superelliptic approximation2005

    • Author(s)
      N.Kobayashi
    • Journal Title

      Materials Science and Engineering A 392

      Pages: 248-253

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Cu-Ni-Si合金における析出粒子の形態と成長方向2005

    • Author(s)
      大野 良
    • Journal Title

      第45回銅及び銅合金技術研究会講演大会講演概要集 45

      Pages: 45-46

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Morphological Stability of Inclusions : Two-Dimensional Analysis with a Superelliptic Approximation2005

    • Author(s)
      N.Kobayashi
    • Journal Title

      Materials Science and Engineering 392

      Pages: 248-253

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Morphology and Growth Direction of Precipitate Particles in a Cu-Ni-Si Alloy2005

    • Author(s)
      R.Ono
    • Journal Title

      Collected Abstracts of the 45th Meeting of Japan Research Institute for Advanced Copper-Base material ane technologies 45

      Pages: 45-46

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Morphological Stability of Inclusions : Two-Dimensional Analysis with a Superelliptic Approximation2005

    • Author(s)
      N.Kobayashi
    • Journal Title

      Materials Science and Engineering A 392

      Pages: 248-253

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Cu-Ni-Si合金における析出粒子の形態と成長方向2005

    • Author(s)
      大野良
    • Journal Title

      第45回銅及び銅合金技術研究会講演大会講演概要集 45

      Pages: 45-46

    • Related Report
      2005 Annual Research Report
  • [Journal Article] エネルギー論による転位上優先析出の理解2004

    • Author(s)
      藤居 俊之
    • Journal Title

      まてりあ 43・11

      Pages: 925-930

    • NAID

      10014123922

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Energy Consideration for Preferential Precipitation on Dislocations2004

    • Author(s)
      T.Fujii
    • Journal Title

      Materia 43[11]

      Pages: 925-930

    • NAID

      10014123922

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effects of Octahedral to Spherical Precipitate-Shape Transition on Elastic Strain Energy due to Misfit Precipitates in Materials with Cubic Structures2004

    • Author(s)
      S.Onaka
    • Journal Title

      Mechanics of Materials 37

      Pages: 179-187

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Magnetic Field-Induced martensitic transformation of Fe-Co Particles in a Cu matrix2003

    • Author(s)
      T.Fujii
    • Journal Title

      Materials Transactions 44・12

      Pages: 2545-2549

    • NAID

      10011817744

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Magnetic Field-Induced Martensitic Transformation of Fe-Co Particles in a Cu Matrix2003

    • Author(s)
      T.Fujii
    • Journal Title

      Materials Transactions 44[12]

      Pages: 2545-2549

    • NAID

      10011817744

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] T.Fujii: "Magnetic Field-Induced Martensitic Transformation of Fe-Co Particles in a Cu Matrix"Materials Transactions. 44・12. 2545-2549 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 田村 友和: "Co-Cr粒子を含むCu合金単結晶の磁気特性評価と電子顕微鏡観察"日本金属学会春期講演概要. 132. 453 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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