Al-4.5%Mg合金におけるクリープ変形中の空洞発生に及ぼす鉄晶出物の影響 Effect of ferrous primary crystals on cavitation in Al-4.5 mass%Mg alloys during creep deformation

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Deformation and cavitation characteristics have been investigated at 613∼693 K for Al–4.5 mass%Mg–0.05 mass%Fe and Al–4.5 mass%Mg–0.2 mass%Fe alloys with grain size of 50 μm. The alloys showed strain-rate sensitivity of 0.3 over a strain-rate range from 10<sup>−5</sup> s<sup>−1</sup> to 10<sup>−2</sup> s<sup>−1</sup> and elongation-to-failure above 300% at a strain-rate of 1 × 10<sup>−3</sup> s<sup>−1</sup>. The results indicates that the alloys behave like Glass I type which deformation is controlled by dislocation glide dragged by solute atoms. Cavitation was increased by increasing iron content for all strains. Most cavities were nucleated at the interface between ferrous primary crystal and matrix and elongated parallel to the tensile direction. The critical diameter of the primary crystal, above which cavity is nucleated, was 1.5 μm at grain boundary and 0.5 μm at grain interior, which were very close to the theoretical results.

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  • 軽金属  

    軽金属 49(2), 57-61, 1999-02-28 

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10002665852
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    4662035
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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