Liquid-Liquid Structure Transition and its Effects on Solidification Behavior of Binary Alloys

2012 ◽  
Vol 554-556 ◽  
pp. 714-720
Author(s):  
Yun Xi ◽  
Xian Fen Li ◽  
Fang Qiu Zu

In our work, some anomalous changes, namely the temperature-induced liquid-liquid structure transitions, were observed at the temperature hundreds degrees above the corresponding liquidus in some binary alloys. Based on the results of liquid structure transitions, corresponding solidification experiments have been carried out on the alloys melted and held at the temperature above or under the liquid-liquid structure transition (L-LST), respectively. It is found that L-LST has a significant effect on solidification behavior and microstructure. There is a general rule that the super-cooling degree increases and the microstructure becomes finer cast from the liquid experienced L-LST.

2018 ◽  
Vol 263 ◽  
pp. 218-227 ◽  
Author(s):  
Peng Jia ◽  
Xueli Li ◽  
Jinyang Zhang ◽  
Kai Zhang ◽  
Xinying Teng ◽  
...  

2013 ◽  
Vol 113 (2) ◽  
pp. 431-437 ◽  
Author(s):  
Ming Yi Xie ◽  
Xian Fen Li ◽  
Gui Bao Xu ◽  
Yu Ting Zhou ◽  
Fang Qiu Zu

2009 ◽  
Vol 24 (7) ◽  
pp. 2378-2384 ◽  
Author(s):  
Fang-Qiu Zu ◽  
Jie Chen ◽  
Xian-Fen Li ◽  
Li-Na Mao ◽  
Yong-Chi Liu

The effects of melt overheating treatment on solidification of Pb-Bi alloys were studied from the viewpoint of liquid-liquid structure change (LLSC). Anomalous temperature dependence of internal friction, electrical resistivity, and entropy of liquid Pb-Bi alloys suggested that discontinuous LLSC occurred within about 520–740 °C, based on which the solidification experiments were carried out with different states of Pb-Bi melts. The results revealed that the LLSC affected the solidification behavior and microstructures significantly, that is, the enlarged undercooling, increased nucleation rate, and refined and improved morphologies were brought about when solidifying from the melt experienced LLSC. It is assumed that the LLSC changed the energy constitution of the melt system, and further affected the effective partition coefficient, thermodynamics, and kinetics of crystal growth, then finally altered the solidification behavior and solidified microstructures. This work brings a novel insight into the effect of melt overheating treatment on solidification, by which it could be more effective to manipulate melts.


2017 ◽  
Vol 123 (6) ◽  
Author(s):  
Yixuan He ◽  
Jinshan Li ◽  
Jun Wang ◽  
Hongchao Kou ◽  
Eric Beagunon

2016 ◽  
Vol 170 ◽  
pp. 261-265 ◽  
Author(s):  
Xiaoxing Qiu ◽  
Jinshan Li ◽  
Jun Wang ◽  
Tong Guo ◽  
Hongchao Kou ◽  
...  

2008 ◽  
Vol 25 (1) ◽  
pp. 317-320 ◽  
Author(s):  
Li Xian-Fen ◽  
Chen Hong-Sheng ◽  
Zu Fang-Qiu ◽  
Chen Zhi-Hao ◽  
Sun Qi-Qiang ◽  
...  

2021 ◽  
Vol 118 (23) ◽  
pp. 231902
Author(s):  
P. F. Yu ◽  
M. Xia ◽  
S. C. Cao ◽  
L. Zeng ◽  
W. Q. Lu ◽  
...  

2010 ◽  
Vol 505 (2) ◽  
pp. 472-475 ◽  
Author(s):  
Xianfen Li ◽  
Fei Zhang ◽  
Fangqiu Zu ◽  
Xue Lv ◽  
Zhenxing Zhao ◽  
...  

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