半溶融状態で撹拌したAl-Cu合金の組織とみかけ粘度

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タイトル別名
  • On the Apparent Viscosity and Structure of Partially Solidified Al-Cu Alloys under Stirring
  • 半溶融状態で攪拌したAl-Cu合金の組織とみかけ粘度
  • ハン ヨウユウ ジョウタイ デ カクハンシタ Al Cu ゴウキン ノ ソシキ

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Apparent viscosity of partially solidified alloys is expected to be extremely influenced by the size and morphology of crystals. An Al-5%Cu alloy was stirred during solidification with a paddle or a columnar rotor, and factors affecting the apparent viscosity and structure of the alloy slurry were investigated.<BR>The apparent viscosity (μ/Pa·s) of the slurry was approximated by the following equation as a function of the rotation speed (n/s−1) between rotor and crucible, the cooling rate (Vc/K·s−1) and the fraction solid (fs).<BR>(This article is not displayable. Please see full text pdf.) <BR>\oindentwhere A=1.8 (paddle) and 0.9 (columnar rotor).<BR>Primary crystals were broken into fine quasi-spherical particles by the stirring, while some of them coalesced into complicated particles in the slurry.<BR>A relationship was observed between the apparent viscosity and the particle coupling ratio Rn, that is, the ratio of the number (mm−2) of fine quasi-spherical primary particles to the number (mm−2) of complicated particles.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 48 (9), 936-944, 1984

    公益社団法人 日本金属学会

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