Effects of Mg Addition on δ' Precipitation and Mechanical Properties of Al-Li-Zr Alloys Containing Ti and/or V

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Mechanical properties and precipitation structures of Al–Li–Mg–Zr alloys containing Ti and/or V were investigated. In our earlier work, the Al–3 mass%Li–0.2 mass%Zr–0.1 mass%Ti and the Al–3 mass%Li–0.2 mass%Zr–0.1 mass%V quaternary alloys have shown the magnificent mechanical properties due to the grain refinement and the fine precipitates which consist of both the metastable Al<SUB>3</SUB>(Zr, Ti or V)-Al<SUB>3</SUB>Li composite precipitates and δ<SUP>′</SUP>(Al<SUB>3</SUB>Li) precipitates. In this work, it was observed that, addition of magnesium from zero to 2 mass% in Al–3 mass%Li–0.2 mass%Zr–0.1 mass%Ti alloy or in Al-3 mass%Li–0.2 mass%Zr–0.1 mass%V alloy magnifies the proof and tensile strengths. The Al-3 mass%Li–1.0 mass%Mg–0.2 mass%Zr–0.1 mass%Ti alloy aged at 473 K for 4 h elongates 6–7% with high ultimate tensile strength about 520–540 MPa. But raising the magnesium content to 2 mass%, the elongation decreases to a value of about 4% with a significant increase in proof strength at the same age condition. It is verified that the magnesium content influences significantly the size and number density of δ<SUP>′</SUP> precipitates.

収録刊行物

  • Materials transactions

    Materials transactions 43(6), 1341-1347, 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)
    10012324389
  • 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
    6200518
  • 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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