Ti添加したAl-10%Mg合金の一方向凝固におけるミクロ偏析
1982 年 32 巻 3 号 p. 124-128
詳細
1982 年 32 巻 3 号 p. 124-128
Al-10%Mg alloys into which Ti 0.05 to 0.15% had been added were unidirectionally solidified. The amount of nonequilibrium eutectic phase and the minimum solute concentration in the dendrite arm in the solidified alloys having equiaxed grains were measured by means of microscopic field plotting and EPMA respectively. The amount of nonequilibrium eutectic phase decreases and the minimum concentration of Mg rises with increase in average cooling rate during solidification. These facts are similar to those of columnar structure in unidirectional solidification and opposite to those of equiaxed structure in non-directional solidification. The minimum Mg concentration of dendrite arm at the start of solidification rises when cooling is accelerated.
