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The Effect of Natural Convection on Equiaxed Dendritic Growth: Quantitative Phase-Field Simulation and Comparison with Synchrotron X-Ray Radiography Monitoring Data
Qi, Xin Bo; Chen, Yun; Kang, Xiu Hong; Li, Dian Zhong
Corresponding AuthorChen, Yun(chenyun@imr.ac.cn)
2016
Source PublicationADVANCES IN MATERIALS SCIENCE AND ENGINEERING
ISSN1687-8434
Pages10
AbstractA two-dimensional (2D) quantitative phase-field model solved by adaptive finite element method is employed to investigate the effect of natural convection on equiaxed dendritic growth of Al-4wt.% Cu alloy under continuous cooling condition. The simulated results are compared with diffusion-limited simulations as well as the experimental data obtained by means of in situ and realtime X-ray imaging technique. The results demonstrate that natural convection induced by solute gradients around the dendritic crystal has an obvious influence on the dendrite morphology and growth dynamics. Since the rejected solute cooper from solid is heavier than aluminum, it sinks down along the interface from the top arm tip to the bottom arm which results in the formation of a circulatory flow vortex on both sides of the dendrite. Hence, the convection promotes the top arm advancing into the melt progressively whereas it suppresses the growth of bottom severely. As the dendrite grows into a large size, the convection becomes more intense and the morphology shows distinguished asymmetric shape. When compared with experimental data, the growth velocity is found to agree substantially better with the simulation incorporating natural convection than the purely diffusive phase-field predictions.
Funding OrganizationNational Natural Science Foundation for Young Scientists of China ; National Natural Science Foundation of China
DOI10.1155/2016/5286168
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation for Young Scientists of China[51401223] ; National Natural Science Foundation of China[51271184]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000385103600001
PublisherHINDAWI PUBLISHING CORP
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123101
Collection中国科学院金属研究所
Corresponding AuthorChen, Yun
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Qi, Xin Bo,Chen, Yun,Kang, Xiu Hong,et al. The Effect of Natural Convection on Equiaxed Dendritic Growth: Quantitative Phase-Field Simulation and Comparison with Synchrotron X-Ray Radiography Monitoring Data[J]. ADVANCES IN MATERIALS SCIENCE AND ENGINEERING,2016:10.
APA Qi, Xin Bo,Chen, Yun,Kang, Xiu Hong,&Li, Dian Zhong.(2016).The Effect of Natural Convection on Equiaxed Dendritic Growth: Quantitative Phase-Field Simulation and Comparison with Synchrotron X-Ray Radiography Monitoring Data.ADVANCES IN MATERIALS SCIENCE AND ENGINEERING,10.
MLA Qi, Xin Bo,et al."The Effect of Natural Convection on Equiaxed Dendritic Growth: Quantitative Phase-Field Simulation and Comparison with Synchrotron X-Ray Radiography Monitoring Data".ADVANCES IN MATERIALS SCIENCE AND ENGINEERING (2016):10.
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