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2004 Fiscal Year Final Research Report Summary

Research on multi functional Cu-Cr-Zr alloys in mechanical and electrical properties produced by controlling its nano-structure

Research Project

Project/Area Number 15560604
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionKanazawa University

Principal Investigator

KITAGAWA Kazuo  Kanazawa University, Graduate School of Natural Science and Technology, 自然科学研究科, 教授 (30019757)

Project Period (FY) 2003 – 2004
Keywordsultrafine grain / ECAP process / Cu-Cr-Zr alloy / mechanical property / electrical property / multi function / thermal stability
Research Abstract

This research has been conducted to produce the excellent Cu alloy in combination with good electrical conductivity and mechanical properties by controlling its nano-structure.
1.The ultrafine grain (UFG) Cu-Cr and Cu-Cr-Zr dilute alloys with different concentrations of alloying elements have been fabricated by ECAP (Equal Channel Angular Pressing), and followed by heat treatment.
(1)The post ECAP aging makes the precipitation hardened ultrafine grain structure rather stable under both thermal and mechanical influence.
(2)Optimal aging conditions are found to ensure the best high cycle fatigue performance in combination with good electric conductivity, strength and ductility.
(3)The significant improvement of tensile and HFC properties observed together with improvement in ductility if compared to ordinal Cu-Cr-Zr alloys fabricated by cold working and heat treatment.
2.The ultra fine grain Cu-0.36Cr alloy was fabricated by multiple ECAP with different strain path, aiming at fabrication of UFO structures with different structures.
(1)ECAP has been capable of producing high strength UFG materials having a considerable amount of uniform deformation.
(2)The tensile strength and high cycle fatigue properties are just slightly affected by the strain path, grain shape and crystallographic texture of ECAP specimens.
3.The fracture and fatigue resistance of ultrafine grain Cu-Cr-Zr alloy produced by ECAP was investigated.
(1)The fatigue crack growth behavior is independent of the specimen orientation, proving the ECAP create a uniform structure with rather isotropic properties.

  • Research Products

    (6 results)

All 2005 2004 Other

All Journal Article (6 results)

  • [Journal Article] Effect of strain path on structure and mechanical behavior of ultra-fine grain Cu-Cr alloy produced by equal-channel angular pressing2005

    • Author(s)
      A.Vinogradov
    • Journal Title

      Acta Materialia 53-8

      Pages: 2181-2192

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Chemical Composition on Structure and Properties of Ultrafine Grained Cu-Cr-Zr Alloys2004

    • Author(s)
      A.Vinogradov
    • Journal Title

      Materials Transactions 45・7

      Pages: 2187-2191

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] ECAP加工したCu-0.36Cr合金の微視組織と低サイクル疲労特性2004

    • Author(s)
      北川 和夫
    • Journal Title

      銅と銅合金 43・1

      Pages: 66-70

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Chemical Composition on Structure and Properties of Ultrafine Grained Cu-Cr-Zr Alloys2004

    • Author(s)
      A.Vinogradov
    • Journal Title

      Materials Transactions 45-7

      Pages: 2187-2191

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 「研究成果報告書概要(欧文)」より2004

    • Author(s)
      K.Kitagawa
    • Journal Title

      Journals of JRI Cu 43-1

      Pages: 66-70

  • [Journal Article] Effect of strain path on structure and mechanical behavior of ultra-fine grain Cu-Cr alloy produced by equal-channel angular pressing

    • Author(s)
      A.Vinogradov
    • Journal Title

      Acta Materialia (in press)

    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2006-07-11  

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