Al-Al<SUB>3</SUB>FeおよびAl-Si共晶合金の凝固時の撹拌による共晶組織およびみかけ粘性の変化

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タイトル別名
  • Changes in Eutectic Structure and Apparent Viscosity by Stirring of Solidifying Al-Al<SUB>3</SUB>Fe and Al-Si Eutectic Alloys
  • Al-Al3FeおよびAl-Si共晶合金の凝固時の攪拌による共晶組織およびみかけ粘性の変化
  • Al Al3Fe オヨビ Al Si キョウショウ ゴウキン ノ ギョウコジ

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Off-eutectic Al-1.5 mass%Fe alloys have been stirred rotationally at the rates from 0.83 s−1 to 12.5 s−1 in a partially solidified state, and variations of eutectic structures and apparent viscosity have been studied. Furthermore, Al-Al3Fe eutectic alloys have been solidified unidirectionally with stirring, and the effect of stirring on the growth morphology of the solidification front has been studied. Al-Si eutectic alloys have been also studied with the same procedure. Component phases in the Al-Al3Fe eutectic are separated by stirring in a partially solidified state. The apparent viscosity of Al-1.5 mass%Fe alloys decreases temporarily in the beginning of the eutectic reaction at most stirring rates. Eutectic Al3Fe grows as a leading phase at the solidification front without stirring, but eutectic α phase partly grows dendritically and becomes a leading phase by stirring. Then eutectic Al3Fe phases form primarily in a residual liquid. The dendritic and leading α phase covers the solidification front more widely with increase in stirring rate. The effect of stirring on the growth morphology of the solidification front in the Al-Si eutectic alloys is similar to that of the Al-Al3Fe eutectic alloy.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 49 (11), 1002-1008, 1985

    公益社団法人 日本金属学会

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