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In situ study the effect of refiner on the microstructure evolution of variable cross-section structure by synchrotron X-ray radiography
Li, FG; Zhang, J; Dai, YB; Bian, FG; Fu, YA; Yin, FC; Sun, BD; Zhang, J (reprint author), Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.
2015
Source PublicationJOURNAL OF CRYSTAL GROWTH
ISSN0022-0248
Volume428Pages:1—7
Subtype期刊文献
AbstractThe formation of microstructures during solidification is strongly affected by the interaction that occurs between factors, such as heat field, melt flow, solute distribution, and number of effective nucleation cores. In this study, the microstructure evolution of a high-purity hypoeutectic Al-Cu alloy at its region of variable cross-section was studied using synchrotron radiation imaging. The characteristics of the thermal field, solute field, and flow field were analyzed according to these radiographs. The results showed that the region of variable cross-section is the site that is more prone to dendrite arms fracture. These dendrites spread radially from the center of the thin wall and the isotherms distribute as an arc-shape. These are the main reasons for the uneven distribution of the microstructure, which lead to undesirable phase formation and aggregation at the region of variable cross-section. The microstnicture can be significantly refined and solute enrichment can be eliminated by adding refiners to alloys. Comparing these two conditions, it can be concluded that the solute and flow field distribution at the variable cross-section region is significantly affected, uniformity of the solidification microstructure is improved, and undesirable phases are eliminated by increase in effective heterogeneous nucleation cores. (C) 2015 Elsevier B.V. All rights reserved.
KeywordDirectional Solidification Grain-refinement Unidirectional Solidification Equiaxed Growth Columnar Front Aluminum Alloys Fragmentation Prediction
Language英语
WOS IDWOS:000360501200001
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24957
Collection中科院上海应用物理研究所2011-2018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
Li, FG,Zhang, J,Dai, YB,et al. In situ study the effect of refiner on the microstructure evolution of variable cross-section structure by synchrotron X-ray radiography[J]. JOURNAL OF CRYSTAL GROWTH,2015,428:1—7.
APA Li, FG.,Zhang, J.,Dai, YB.,Bian, FG.,Fu, YA.,...&Zhang, J .(2015).In situ study the effect of refiner on the microstructure evolution of variable cross-section structure by synchrotron X-ray radiography.JOURNAL OF CRYSTAL GROWTH,428,1—7.
MLA Li, FG,et al."In situ study the effect of refiner on the microstructure evolution of variable cross-section structure by synchrotron X-ray radiography".JOURNAL OF CRYSTAL GROWTH 428(2015):1—7.
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