In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth

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	In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth
	Li, FG; Zhang, J; Dong, Q; Dai, YB; Fu, YA; Xie, HL; Mi, J; 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 Publication	MATERIALS CHARACTERIZATION
ISSN	1044-5803
Volume	109 Pages:9—18
Subtype	期刊文献
Abstract	Special growth pattern representing unique growth conditions is a vital clue to investigate the morphology evolution mechanism in metallic alloy solidification. The dendrite pattern and growth orientation of dendritic doublons in the hypoeutectic Al-Cu alloy have been studied by synchrotron radiation imaging technology and electron back scatter diffraction. The results show that this kind of doublon is two-dimensional and the secondary arms grow perpendicularly to the primary stem. This doublon morphology can appear as an equiaxed grain, columnar dendrite, or coexist with a regular dendrite. The growth directions of the dendritic doublon tips and the secondary arms are < 110 > and < 001 >, respectively. Rising cooling rate or Cu concentration in the alloys facilitates the formation of the doublonic structure. According to the kinetic morphology diagram of Al-Cu alloys (pattern-dimensionless supercooling-anisotropy) obtained from the experimental data, the dendritic doublon forming region was above the boundary of fractal dendrite and compact dendrite. (C) 2015 Elsevier Inc All rights reserved.
Keyword	Directional Solidification Diffusional Growth Morphology Diagram Interfacial Energy Aluminum-alloys Anisotropy Stability Crystal Radiography Simulation
Language	英语
WOS ID	WOS:000365365400002
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/24958
Collection	中科院上海应用物理研究所2011-2020年
Corresponding Author	Zhang, 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,Dong, Q,et al. In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth[J]. MATERIALS CHARACTERIZATION,2015,109:9—18.
APA	Li, FG.,Zhang, J.,Dong, Q.,Dai, YB.,Fu, YA.,...&Zhang, J .(2015).In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth.MATERIALS CHARACTERIZATION,109,9—18.
MLA	Li, FG,et al."In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth".MATERIALS CHARACTERIZATION 109(2015):9—18.

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