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2006 Fiscal Year Final Research Report Summary

Effects of grain-boundaries on high-temperature fracture discussed by experiments using double cylindrical bicrystals

Research Project

Project/Area Number 16560607
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

ONAKA Susumu  Tokyo Institute of Technology, Interdisciplinary raduate School of Science and Engineering, Professor, 大学院総合理工学研究科, 教授 (40194576)

Co-Investigator(Kenkyū-buntansha) KATO Masaharu  Tokyo Institute of Technology, Interdisciplinary raduate School of Science and Engineering, Professor, 大学院総合理工学研究科, 教授 (50161120)
FUJII Toshiyuki  Tokyo Institute of Technology, Interdisciplinary raduate School of Science and Engineering, Associate Professor, 大学院総合理工学研究科, 助教授 (40251665)
Project Period (FY) 2004 – 2006
Keywordshigh-temperature deformation / high-temperature fracture / grain boundary / plastic deformation / crystal defects
Research Abstract

A double cylindrical bicrystal is a bicrystal consisting of a cylindrical inside grain with a second grain wrapped around its curved side surface. Using a double cylindrical bicrystal of a Cu-SiO_2 alloy, tensile tests were performed at 800K under 2×10^<-4>/s. Three specimens cut from the same bicrystal were deformed to three different strains. Preferential formation of grain-boundary cracks around the cylindrical inside grain was observed after the tensile tests. In addition to the occurrence of grain-boundary sliding, the misfit of slip deformation at the grain boundary affects the formation of the grain-boundary cracks.

  • Research Products

    (2 results)

All Other

All Journal Article (2 results)

  • [Journal Article] Effects of Grain-Boundary Sliding and Plastic Deformation of Grains on the Formation of Grain-Boundary Cracks in a Double Cylindrical Bicrystal of a Cu-SiO2 Alloy

    • Author(s)
      M.Seki, M.Fujimoto, T.Fujii, M.Kato, S.Onaka
    • Journal Title

      Materials Transactions, JIM (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of grain-boundary sliding and plastic deformation of grains on the formation of grain-boundary cracks in a double cylindrical bicrystal of a Cu-SiO_2 alloy

    • Author(s)
      M.Seki, M.Fujimoto, T.Fujii, M.Kato, S.Onaka
    • Journal Title

      Materials Transactions(JIM) (In press)

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

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Published: 2008-05-27  

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