準結晶を含むガス噴霧Al-7.8%V-4%Fe合金粉末の押出成形と耐熱強度 Elevated-temperature strength of Al-7.8 mass%V-4 mass%Fe alloy containing icosahedral phase produced by extrusion of atomized powder

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The bulk material with a size of about φ8 mm × 300 mm was produced by extrusion of gas atomized Al–7.8 mass%V–4 mass%Fe alloy powder at 623, 673 and 723 K. The gas atomized powder consists of icosahedral, fcc–Al and Al<sub>11</sub>V phases and has a spherical shape with an average diameter of about 31 μm. The bulk material extruded at 623 K consists of icosahedral and Al phases and has a high packing density of approximately 100%. The ultimate tensile strength (σ<sub>UTS</sub>), plastic elongation (ε<sub>P</sub>), Vickers hardness (HV) and Young's modulus (<i>E</i>) at room temperature are 585 MPa, 4.5%, 190 and 84.8 GPa, respectively. And then the σ<sub>UTS</sub>, ε<sub>P</sub> and HV at 573 K are 305 MPa, 5.0% and 90, respectively. The HV remains unchanged even after holding for 432 ks at 573 K. The coefficient of thermal expansion is 21.4 × 10<sup>−6</sup>K<sup>−1</sup>, which is smaller by 15% than that of the 7075–T6 alloy. The bulk materials extruded at 673 and 723 K also have the similar high elevated temperature strength of 291 and 277 MPa, respectively, at the temperature 573 K. The extruded bulk materials with high elevated-temperature strength are expected to develop as a new type of high strength material.

収録刊行物

  • 軽金属

    軽金属 47(10), 539-544, 1997-10-30

    The Japan Institute of Light Metals

参考文献:  17件中 1-17件 を表示

被引用文献:  7件中 1-7件 を表示

各種コード

  • NII論文ID(NAID)
    10003796003
  • 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
    4324280
  • 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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