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中文摘要：
团结行为和 Sn 双性人合金的形态学上的液体液体结构转变(L-LST ) 的效果进一步被学习。结果证明主要、最容易溶解的阶段的 undercooling 增加，微观结构在从经历 L-LST 的 melt 团结以后变得更好。在 hypoeutectic 合金，当从经历 L-LST 的 melt 团结时，同时，主要阶段的形态学从冷杉木树水晶变成 equiaxed 水晶，和不太主要的阶段和更最容易溶解的结构被观察。而且在最容易溶解的合金，最容易溶解的阶段的间距显著地减少。这些调查将是有益的推进在 melt 结构和团结的微机制之间的关联的探索。
英文摘要：
The effect of the liquid-liquid structure transition（L-LST） on the solidification behaviors and morphologies of Sn-Bi alloys was studied further. The results show that the undercooling of the primary and eutectic phase increases and the microstructure becomes finer after solidifying from the melt experiencing the L-LST. In the meantime, in hypoeutectic alloy, when solidifying from the melt experiencing the L-LST, the morphology of primary phase changes from the fir-tree crystal into the equiaxed crystal, and less primary phase and more eutectic structure are observed. Moreover, in eutectic alloy, the spacing of eutectic phase decreases markedly. These investigations would be beneficial to further exploration of the correlation between the melt structure and the micro mechanism of solidification.
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