5083アルミニウム合金の広井温度およびひずみ速度範囲にわたる超塑性と破面形態 Superplasticity and fractography over wide ranges of temperature and strain rate in a 5083 aluminum alloy

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Superplasticity over the wide ranges of both temperature and strain rate has been investigated for a 5083 aluminum-magnesium base alloy. Large elongations of more than 300% were obtained in a temperature range of over 200 K and in a strain-rate range of the two orders of magnitude. Such large elongations were attributed to both grain boundary sliding and solute-drag controlled creep mechanisms. Fractography has been performed systematically in the light of deformation mechanism and elongation to failure. In a low strain rate, granular feature was observed on fracture surfaces. The granular feature was coarsened with increasing temperature. As temperature approached to an apparent solidus, fracture surface was accompanied with typical filaments suggesting the presence of a liquid phase. Near the apparent solidus temperature, a small amount of filaments was found at a strain rate of 1.4 × 10<sup>−2</sup> s<sup>−1</sup>, while distinct intergranular fracture was found at 2.8 × 10<sup>−1</sup> s<sup>−1</sup>. Consequently, it is reconfirmed that the morphology of fracture surface is correspondent with deformation mechanisms and elongation to failure.

収録刊行物

  • 軽金属

    軽金属 49(8), 378-382, 1999-08-30

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10002666803
  • 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
    4835093
  • 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  CJP引用  NDL  J-STAGE 
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