结果表明：锂能消除合金凝固态的柱状晶区并使之转变为等轴晶区；
The results show that the dendrite crystal area of alloy is diminished and then become equiaxed structures after lithium is added;
过滤后铸棒组织中的柱状晶区缩小，中心等轴晶区扩大、晶粒度降低。
The area of columnar structures decreased, and that of equiaxed crystals enlarged. The grain size reduced.
焊缝区组织主要为等轴晶和树枝柱状晶，熔合区组织主要为柱状晶。
The crystallizing morphology on the weld seam was equiaxed grains and dendrites and that on the fusion area were columnar crystals.
在柱状晶与等轴晶过渡区中存在着偏聚物。
Segregated solutes and inclusions are distributed at the transition boundary of the column crystal and the equiaxial crystal.
在柱状晶与等轴晶过渡区中存在着偏聚物。
Segregated solutes and inclusions are distributed at the transition boundary of the column crystal and the equiaxial crystal.
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