Al-遷移金属系合金急冷凝固材の組織と機械的性質に及ぼすMg添加の影響 Effect of Mg additions on the structures and mechanical properties of rapidly solidified Al-transition metal alloys

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For the purpose of obtaining aluminum P/M materials strengthened by solid solution of Mg and dispersion of transition metal compounds, Al-transition metal alloys with or without addition of Mg were rapidly solidified. Al–8 mass%Fe, Al–8 mass%Mn, and Al–8 mass%Mn–2 mass%Cr alloys were rapidly solidified with 0, 4 and 8 mass% Mg. Rapid solidification (RS) was performed by gas atomizing the alloy melt and subsequent splat-quenching on a rotating water-cooled copper roll under an argon atmosphere. The RS flakes were consolidated to the P/M materials by cold pressing and hot extrusion. Metallographic structures and constituent phases were studied for both RS flakes and P/M materials by optical microscope, TEM and X-ray diffraction. Mechanical properties of as-extruded P/M materials were examined by tensile test at room and elevated temperatures. Uniform dispersion of intermetallic compounds was observed in all the extruded P/M materials. Added Mg was present as the solute in all the P/M materials except for Al–Mg–Mn–Cr alloy in which solute Mg content decreased due to formation of the ternary compound Cr<sub>2</sub>Mg<sub>3</sub>Al<sub>18</sub>. The P/M materials containing Mg generally exhibited higher hardness and strength at room temperature, than those without Mg. It was considered that both solid solution of Mg and dispersion of intermetallic compounds were contributing the hardness and strength increase in the rapidly solidified Al–Mg–transition metal alloys.

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  • 軽金属  

    軽金属 50(7), 330-334, 2000-07-30 

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10004549311
  • 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
    5411667
  • 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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