Effect of liquid-liquid structure transition on solidification of Sn-Bi alloys

来源期刊:中国有色金属学报(英文版)2007年第5期

论文作者:祖方遒 周兵 李先芬 益汛 陈轶平 孙其强

文章页码:893 - 893

Key words:liquid-liquid structure transition; undercooling; solidification structure; Sn-Bi alloys

Abstract: 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.

基金信息:the National Natural Science Foundation of China
Chinese Ministry of Euducation

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