研究論文
Al-SiおよびAl-Mg合金の凝固過程におけるデンドライト間隙（げき）の残留液相の流動
1987 年 59 巻 4 号 p. 228-232
詳細
1987 年 59 巻 4 号 p. 228-232
The residual liquid in solidifying Al-5mass%Si and Al-3mass%Mg alloys was forced to flow into a tube at different fractions solid by compressing. The apparent permeability of residual liquid was calculated from the flow rate of liquid and pressure in Darcy's equation. The interdendritic fluid flow proceeds at fractions liquid within a range from 0.6 to 0.2. The apparent permeability is nearly proportional to the cube of fraction liquid. When slender dendrites are growing in Al-5mass%Si alloy, the apparent permeability is lower at the same fraction liquid. When shorter and rounded dendrites are growing in Al-3mass%Mg alloy, on the other hand, the apparent permeability is higher. Independent of alloy systems, the apparent permeability is almost proportional to the 2.5th power of the hydraulic radius which depends on the geometory of dendrites.
