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Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al
Yang, J; Zhang, J; Dai, YB; Ma, JB; Li, FG; Bian, FG; Mi, JW; Sun, BD; Zhang, J (reprint author), Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.
2015
Source PublicationCOMPUTATIONAL MATERIALS SCIENCE
ISSN0927-0256
Volume109Pages:41—48
Subtype期刊文献
AbstractIn this study, the elements Fe, Si, V and Ti, which exhibit typical segregation behavior in Al, were chosen as solute atoms to be analyzed. The structure of molten Al, the local structure around solute atoms and the diffusion of the solute atoms were studied using ab initio molecular dynamics simulations. The results showed that the minimum addition of a solute (1 atom) does not significantly influence the structure of liquid Al as a whole. However, the local structure around foreign atoms varies dramatically for the different solute species. The local structure around Fe was the most compact and stable among the four types of solute atoms, leading to its lower diffusion coefficient. Conversely, the local structure around Si was the most relaxed structure. For the transition metal elements (Fe, V and Ti), there was a correlation between the equilibrium partition coefficients and local structures around these solutes in the molten Al. This simple relationship between the solute atmosphere, chemistry and temperature, requires further study. In summary, the close packing and stable local structure around the solute atoms can affect both their diffusion and segregation behavior in the melt. In addition, we suggest that more transition metal elements should be investigated to corroborate the results of this study. (C) 2015 Elsevier B.V. All rights reserved.
KeywordMolecular-dynamics Voronoi Polyhedra Metallic-glass Construction
Indexed BySCI
Language英语
WOS IDWOS:000360248000007
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24858
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorZhang, J (reprint author), Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.
Recommended Citation
GB/T 7714
Yang, J,Zhang, J,Dai, YB,et al. Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al[J]. COMPUTATIONAL MATERIALS SCIENCE,2015,109:41—48.
APA Yang, J.,Zhang, J.,Dai, YB.,Ma, JB.,Li, FG.,...&Zhang, J .(2015).Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al.COMPUTATIONAL MATERIALS SCIENCE,109,41—48.
MLA Yang, J,et al."Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al".COMPUTATIONAL MATERIALS SCIENCE 109(2015):41—48.
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