2024系アルミニウムPM合金のミクロ組織と機械的性質に及ぼすFe, Ni添加の影響 Effect of Fe and Ni addition on microstructure and mechanical properties of PM 2024 aluminum alloys

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2024Al–3Fe–Ni alloy powders with nominal Ni contents of 0, 3, 5 and 10 mass% were produced by an air atomization technique, and consolidated to a full density by the cold isostatic pressing and hot extrusion at 723 K. The effect of Ni content on the improvement of mechanical properties of the extrudates has been investigated at temperatures from ambient temperature to 573 K, related with microstructure changes of the alloy powders and extrudates. By means of the X-ray diffraction for the powders, constituent phases of Al<sub>9</sub>FeNi and Al<sub>3</sub>Ni were identified in the specimens containing Ni higher than 3 mass% and 5 mass% respectively, while both phases of Al<sub>3</sub>Fe and Al<sub>7</sub>Cu<sub>2</sub>Fe were also identified for all alloys. The Al<sub>9</sub>FeNi phase was found to be solidified as a very fine eutectic compound with the α–Al. The amount of the eutectic microstructure was maximum in the powders with 5 mass%Ni. After extrusion at 723 K, the four alloys exhibited almost round shape intermetallic particles with diameters less than about 0.3 μm. The average particle size was minimum at 5 mass%Ni content at 573 K. The tensile strength of the extrudats increased linearly with Ni content at each testing temperature, although the extrudate with 10 mass%Ni addition showed extremely poor ductility at temperatures lower than 373 K. The tensile strength at high temperatures was discussed based on the attractive interaction between dislocations and dispersed particles.

収録刊行物

  • 軽金属

    軽金属 46(4), 189-194, 1996-04-30

    一般社団法人 軽金属学会

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各種コード

  • NII論文ID(NAID)
    10003793683
  • 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
    3947910
  • 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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