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Development of high-temperature structural material with an Al_3Ti base

Research Project

Project/Area Number 62850134
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 金属材料(含表面処理・腐食防食)
Research InstitutionKyoto University

Principal Investigator

YAMAGUCHI Masaharu  Faculty of Engineering, Kyoto University, 工学部, 教授 (90029108)

Co-Investigator(Kenkyū-buntansha) 馬越 佑吉  大阪大学, 工学部, 助教授 (00029216)
SHIRAI Yasuharu  Faculty of Engineering, Kyoto University, 工学部, 助手 (20154354)
KIKUCHI Shiomi  Faculty of Engineering, Kyoto University, 工学部, 助教授 (70026326)
YUKICHI Umakoshi  Faculty of Engineering, Osaka University
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥22,000,000 (Direct Cost: ¥22,000,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1987: ¥21,000,000 (Direct Cost: ¥21,000,000)
KeywordsAl_3Ti / Al_3V / Ductility / 常温延性 / 高温変形 / 軽量耐熱材料
Research Abstract

Al_3Ti is a potential candidate for a high-temperature structural material of high strength/density ration because of its low density and excellent oxidation resistance.
The major mode of deformation of Al_3Ti is the orderd twinning of the type {111}<11^^-] which does not disturb the DO_<22>-type symmetry of the lattice. At high temperatures, not only ordered twinning but also slip along<110] and <100] become operative. Polycrystalline Al_3Ti shows yielding ecen at room temperature ; however, its francture strain is much less than 1%. The stress-strain behavior and yield stress of single crystals of Al_3Ti shows a strong orientaltion dependence. This can be explained in view of the orientation and loading mode dependence of ordered-twinning.
Alloying additions of hafnium, zirconium lithium and boron improve ductility of Al_3Ti. Additions of some rate-earth elements may also increase the activity of ordered twinning and improve ductility of Al_3Ti. Ductility of Al_3V, which is isostructural to Al_3Ti, is improved substantially by the partial replacement of vanadium by titanium. This is because the activity of ordered twinning in Al_3V is increased by the partial replacement of vanadium by titanium.
Investigations on the effect of alloying elements which substitute for al on ductility of Al_3Ti are now in progress.

Report

(2 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 山口正治: 軽金属. 38. 228-237 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Umakoshi: Phil.Mag.A. 58. 651-666 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Umakoshi: J.Mater.Sci.(1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 山口正治: 金属. 59. 49-54 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M.Yamaguchi: Phil.Mag.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M.Yamaguchi: Phil.Mag.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M.Yamaguchi: "Deformation behavior of single and polycrystalline Al_3Ti and Al_3Ti with ternary alloying additions in "Dispersion Strengthened Aluminum Alloys"" The Minerals,Metals and Materials Society, 20 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M. Yamaguchi: "Plasticity of Al_3Ti and possibility of its being improved" J. Japan Inst. Light Metals. 38. 228-237 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y. Umakoshi: "Deformation and improvement of ductility of intermetallic compounds Al_3V and Al_3(Ti,V)" Phil. Mag. A. 58. 651-666 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y. Umakoshi: "Oxidation resistance of intermetallic compounds Al_3Ti and TiAl" J. Mater. Sci.(1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M. Yamaguchi: "TiAl as a new high-temperature structural material" Kinzoku. 59. 49-54 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M. Yamaguchi: "Plastic deformation of polysynthetically twinned crystals of TiAl" Phil. Mag.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M. Yamaguchi: "Plastic deformation of single crystals of Al_3Ti" Phil. Mag.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M. Yamaguchi: Deformation behavior of single and Polycrystalline Al_3Ti and Al_3Ti with ternary alloying additions in "Dispersion Strengthened Aluminum Alloys". The Minerals, Metals & Materials Society, 721-740 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 山口正治: 軽金属. 38. 228-237 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Umakoshi: Phil.Mag.A. 58. 651-666 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Umakoshi: J.Mater.Sci.(1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 山口正治: 金属. 59. 49-54 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] M.Yamaguchi: Phil.Mag.

    • Related Report
      1988 Annual Research Report
  • [Publications] M.Yamaguchi: Phil.Mag.

    • Related Report
      1988 Annual Research Report
  • [Publications] M.Yamaguchi: "Deformation behavior of single and polycrystalline Al_3Ti and Al_3Ti with ternary alloying additions in "Dispersion Strengthened Aluminum Alloys",Ed.by Y.M. Kim and W.M. Griffit" The Minerals,Metals and Materials Society, 721-740 (1988)

    • Related Report
      1988 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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