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

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	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
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	109 页码:9—18
文章类型	期刊文献
摘要	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.
关键词	Directional Solidification Diffusional Growth Morphology Diagram Interfacial Energy Aluminum-alloys Anisotropy Stability Crystal Radiography Simulation
语种	英语
WOS记录号	WOS:000365365400002
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/24958
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Zhang, J (reprint author), Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.
推荐引用方式 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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