Precipitation Behavior of P/M Hypereutectic Al-Si-Cu-Mg Alloys Containing Fe and Ni

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The precipitation phenomena of P/M hypereutectic Al–Si–Cu–Mg alloys with and without Fe and Ni addition were investigated by means of DSC, hardness measurements, TEM and EDX analyses. In order to clarify the effects of high density dislocations introduced in the P/M hypereutectic alloys on the precipitation process, an alloy with low Si was produced by the conventional ingot metallurgy (I/M) and its precipitation kinetics and sequence were compared with those of the P/M alloys. It was found that the addition of Fe and Ni produces intermetallic compounds containing Cu which decrease the volume fraction of GP zones, resulting in the reduced precipitation hardening. The high density dislocations introduced during quenching retard the formation of GP zones and accelerate the precipitation of intermediate phases in the P/M alloys. The precipitation sequence of the P/M hypereutectic alloys is markedly influenced by the formation of the stable Q phase (Al<SUB>5</SUB>Cu<SUB>2</SUB>Mg<SUB>8</SUB>Si<SUB>6</SUB>) which modifies the Cu/Mg ratio of the matrix.

収録刊行物

  • Materials transactions, JIM

    Materials transactions, JIM 39(3), 357-364, 1998-03

    社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10003802082
  • 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
    4440474
  • 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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