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Elastic Modulus of Al-Li Alloys.

Research Project

Project/Area Number 62550524
Research Category

Grant-in-Aid for General Scientific Research (C)

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

Principal Investigator

HORITA Zenji  Faculty of Engineering, Kyushu University, Research Associat., 工学部, 助手 (20173643)

Co-Investigator(Kenkyū-buntansha) SANO Takeshi  Faculty of Engineering, Kyushy University, Research Associate., 工学部, 助手 (70037810)
MIURA Yasuhiro  Faculty of Engineering, Kyushu University, Associate Professer., 工学部, 助教授 (80037879)
NEMOTO Minoru  Faculty of Engineering, Kyushu University, Professor., 工学部, 教授 (90005265)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1987: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsAl-Li alloys / Al-Mg alloys / shear modulus / Young's modulus / Al-base solid / solution alloys / Al-Li合金 / A-Mg合金 / 弾性係数 / Al-Li固溶体合金 / 複合則
Research Abstract

Lithium containing aluminum alloys have a potential importance as new alloys for aeronautical applications with high rigidity and low density. In the peresent work, measurements of the elastic modulus were made of such alloy systems as Al-Li, Al-Mg,and Al-Li-Mg that are the basic systems for the development of practical Al-Li alloys. The results are summarized as follows:
(1) The single addition of Li to Al up to 14at% increases both the young's modulus(E) and the shear modulus(G) of Al. The young'.s modulus of the binary Al-Li solid solution is expressed by an empirical equation, E _<(Al-Li)> = 73 + 0.9 C _<Li> (GPa) where the Young's modulus of pure Al is 73 GPa, and C _<Li> is the at % of Li.
(2) The single addition of Mg to Al up to 6 at% decreases, slightly but linearly with the Mg concentration, both E and G. The Young's modulus of the binary Al-Mg alloy is expressed by the following empirical equation, E (_<Al-Mg>) = 73 - 0.1 C _<Mg> (GPa) where C _<Mg> is the atomic % of Mg.
(3) Among the intermetallic compounds that appear in the binary or ternary alloy systems, '-Al_3 Li phase has a tendency to increases both E and G of Al but the effects of T-Al _2 LiMg phase is negligible.
(4) The effects of the complex addition of Li and Mg, within the solid solubility limits, seem to be additive, implying a negligible interaction between Li and Mg.
(5) A large increase of the shear modulus(G) of Al by the addition of Li substantiates the possible stroung elastic interaction due to the modulus effects between the moving dislocations and the solute(Li) atmosphere, which successfully explain the observed high temperature strength of the solid solution Al-Li alloys.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Y.Miura;K.Yusu;M.Furukawa;M.Nemoto: Al-Li IV(Proc.4th Int.Al-Li Conference)Journal de Physique. 48. 549-555 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] M.Furukawa;Y.Miura;M.Nemoto: Al-Li IV(Proc.4th Int.Al-Li Conference)Journal de Physique. 48. 557-563 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Miura;S.Nishitani;M.Furukawa;M.Nemoto: Strength of Metals and Alloys(ICSMA 8). 1. 995-1000 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Miura;A.Pianelli;G.Champier: Proc.8th Conf.on Applied Crystallography. 1. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Z.Horita;K.Ichitani;T.Sano;M.Nemoto: Proc.9th European Congress on Electron Microscopy. 1. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Z.Horita;K.Ichitani;T.Sano;M.Nemoto: Philosophical Magazine.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] MIURA, Yasuhiro: "Temperature Dependence of Yield Strength of Al-Li Single Crystals." Al-Li IV (Proc. 4th Int. Al-Li Conf.), Journal de Physique.48. 549-555 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] FURUKAWA, Minoru: "Acoustic Emission during Deformation of Al-Li Alloys." Al-Li IV (Proc. 4th Int. Al-Li Conf.), Journal de Physique.48. 557-563 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] MIURA, Yasuhiro: "Yield Strength of Al-Li Solid Solution Alloys at High Temperatures." Strength of Metals and Alloys (ICSMA 8).2. 995-1000 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] MIURA, Yasuhiro: "X-Ray Diffraction Study of Rapidly Solidified Al-Cr Alloys." Proc. 8th Conf. on Applied Crystallography.1. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] HORITA, Zenji: "Determination of Local Thickness and Composition in the Analytical Electron Microscope." Proc. 9th European Congress on Electron Microscopy.1. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Miura;K.Yusu;M.Furukawa;M.Nemoto.: Al-Li IV(Proc.4th Int.Al-Li Conferencs). 48. 549-555 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] M.Furukawa;Y.Miura;M.Nemoto.: Al-Li IV(Proc.4th Int.Al-Li Conference)Journal de Physique. 48. 557-563 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Miura;S.Nishitani;M.Furukawa;M.Nemoto.: Strength of Metals and Alloys(ICSMA 8). 1. 995-1000 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Miura;A.Pianelli;G.Champier.: Proc.8th Conf.on Applied Crystallography. 1. (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Z.Horita;K.Ichitani;T.Sano;M.Nemoto.: Proc.9th European Congress on Electron Microscopy. 1. (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Z.Horita;K.Ichitani;T.Sano;M.Nemoto.: Philosophical Magazine.

    • Related Report
      1988 Annual Research Report

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

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