摘要
Directional solidification experiments were conducted on Pb-30 wt%Bi peritectic alloy to investigate the two-phase microstructure at various growth rates and diameters of samples, and the formation of two-phase microstructure and the micro-scale were also studied. The experiment results show that the transition of the structure from cellular primary α phase and inter-cellular peritectic β phase to dendritic primary α phase and inter-dendritic peritectic β phase was presented with increasing the growth velocity from 1 μm/s to 100 μm/s. Whereas the incomplete banded structure and the oscillatory structure were observed in sample with diameter of 1.8 mm and 7 mm as the growth rate V ≤ 0.5 μm/s, respectively. It is also demonstrated that the primary dendrite arm spacing of α phase coincides with the equation of λV 0.16= 241.0μmV 1.16sV -0.16, which shows a good agreement with Hunt model and Trivedi model.
源语言 | 英语 |
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页(从-至) | 445-449 |
页数 | 5 |
期刊 | Zhuzao/Foundry |
卷 | 59 |
期 | 5 |
出版状态 | 已出版 - 5月 2010 |