Hardness and Electrical Resistivity Changes during Ageing of Rapidly Solidified Al-12.5Si-1Mg Alloy

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Ribbons with the composition Al–12.5Si–1Mg were prepared by melt spinning. X-ray diffraction of as melt spun ribbons showed complete solubility of Si in aluminum. The as melt spun resistivity was 36 μΩ cm for ribbons of 24 μm thickness. This value relaxes to 9.0 μΩ cm on prolonged annealing. The hardness of the as melt spun ribbons was 1500 MN/m<SUP>2</SUP>, and relaxes to reach a value of 800 MN/m<SUP>2</SUP> after prolonged annealing. The activation energy estimated from isothermal ageing ranged from 1.05 to 1.26 eV. An equation is given to fit the kinetics of relaxation. Discussion of resistivity and hardness relaxation is given and is related to ordering and silicon precipitation.

収録刊行物

  • Materials transactions, JIM

    Materials transactions, JIM 38(5), 401-405, 1997-05

    社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10002452477
  • NII書誌ID(NCID)
    AA10699969
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09161821
  • NDL 記事登録ID
    4231127
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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