CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
In Situ and Real-Time Observation of the Solidification Process of Al-20 mass%Cu Alloy by Synchrotron X-ray Radiography
Kang, MD; Gao, HY; Shu, D; Wang, J; Li, FG; Fu, YA; Ling, LSB; Sun, BD; Dshu@sjtu.edu.cn; junwang@sjtu.edu.cn
2014
Source PublicationMATERIALS TRANSACTIONS
ISSN1345-9678
Volume55Issue:5Pages:774—778
AbstractHigh brilliance synchrotron X-ray radiography has been used to in situ study the solidification process of Al-20 mass%Cu alloy with nominal spatial and temporal resolutions of 7.4 mu m and 300 ms, respectively. The block of favorably oriented dendrites by the unfavorably oriented ones was first observed in metal solidification, which related to solute interaction of neighbor dendrites. Solute interaction can also retard the growth of dendrites at the grain boundary, which makes the unusual overgrowth phenomenon possible. Fragmentation occurred when dendrite branches were detached from mother dendrite by local re-melting during the dendrite ripening. Fragmentations together with nucleated dendrites contributed to the columnar to equiaxed transition (CET) and the gravity played a significant role in the final microstructure due to the density difference between primary aluminum dendrites and the melt. In addition, the microporosity formation was observed in the inter-dendrite at the last stage of solidification.
KeywordTo-equiaxed Transition Directional Solidification Phase-field Dendritic Growth Simulation Grains
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14184
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorDshu@sjtu.edu.cn; junwang@sjtu.edu.cn
Recommended Citation
GB/T 7714
Kang, MD,Gao, HY,Shu, D,et al. In Situ and Real-Time Observation of the Solidification Process of Al-20 mass%Cu Alloy by Synchrotron X-ray Radiography[J]. MATERIALS TRANSACTIONS,2014,55(5):774—778.
APA Kang, MD.,Gao, HY.,Shu, D.,Wang, J.,Li, FG.,...&junwang@sjtu.edu.cn.(2014).In Situ and Real-Time Observation of the Solidification Process of Al-20 mass%Cu Alloy by Synchrotron X-ray Radiography.MATERIALS TRANSACTIONS,55(5),774—778.
MLA Kang, MD,et al."In Situ and Real-Time Observation of the Solidification Process of Al-20 mass%Cu Alloy by Synchrotron X-ray Radiography".MATERIALS TRANSACTIONS 55.5(2014):774—778.
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