Effects of Excess Mg and Si on the Isothermal Ageing Behaviours in the Al-Mg_2Si Alloys

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The effects of excess Mg and Si contents on the isothermal ageing processes of Al-Mg<SUB>2</SUB>Si alloys have been investigated by means of transmission electron microscopy and the following results were obtained. After the formation of β<SUP>′′</SUP> needles inducing large age hardening, cuboid β particles precipitate in both the excess Mg and the quasi-binary alloys, but fine Si particles nucleate in the excess Si alloys. In the quasi-binary alloy, the following reaction is the precipitation of β<SUP>′</SUP> rods and then β plates form. In the excess Si alloys, various rodlike precipitates form after the precipitation of β<SUP>′′</SUP> needles and Si particles in the sequence: Type-A rods→Type-B rods→β<SUP>′</SUP> rods. This precipitation sequence can be understood by considering the chemical compositions of them determined by Matsuda <I>et al</I>.

収録刊行物

  • Materials transactions

    Materials transactions 43(6), 1371-1380, 2002-06-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012324501
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6200577
  • 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  CJP引用  NDL  J-STAGE 
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