アルミニウム合金の成長方位とセル‐デンドライト遷移挙動

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タイトル別名
  • Cell-dendrite transition in aluminum alloys growing in different directions
  • アルミニウム ゴウキン ノ セイチョウ ホウイ ト セルーデンドライト センイ

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抄録

A metallographic work was carried out of Al-Ti and Al-Cu alloys (partition coefficient k; 7.8 and 0.17 respectively) unidirectionally solidifing in <100>, <110> and <111> directions. Cell-dendrite transition is governed by the heat flow direction and constitutional undercooling. Dendrite arms branch from cells at an early stage along the heat flow not in the <100> prefered growth orientation. The growing arms gradually shift toward the prefered orientation with increase in C0•R/G. Branching and growth of the branched arms delay, when the prefered orientation is at a large angle to the heat flow. Pronounced constitutional undercooling accelerates the branching and the growth of branched arms. Characteristic transition behaviors in <100>, <110> and <111> directions are described in detail.

収録刊行物

  • 軽金属

    軽金属 29 (8), 347-353, 1979

    一般社団法人 軽金属学会

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