Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy

doi:10.1007/s12217-021-09913-4

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	Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy
	Kong, Yafei 1,2; Luo, Xinghong 1; Li, Yang 1; Liu, Shi 1
刊名	MICROGRAVITY SCIENCE AND TECHNOLOGY
	2021-12-01
卷号	33 期号:6 页码:11
关键词	Al-Cu alloy Drop tube Microgravity Dendrite Solidification
ISSN号	0938-0108
DOI	10.1007/s12217-021-09913-4
通讯作者	Luo, Xinghong(xhluo@imr.ac.cn)
英文摘要	The solidification experiments of Al-2.8 wt.% Cu alloy were conducted under both microgravity and normal gravity conditions by using a 50-m-high drop tube. The solidification microstructure and element distribution were analyzed by using OM, EBSD and EPMA. Columnar dendrites were found growing epitaxially from the seeds during solidification under both microgravity and normal gravity conditions. Comparatively, the primary dendrite spacing and secondary dendrite spacing formed under microgravity condition were smaller, and the deviation angle between growth direction and the preferred crystal orientation < 001 > was smaller. Cu content in the center region of 1g sample is always higher than that of mu g sample, and shows a characteristic of high in the middle and low at the edges along radial directions. While the Cu content in mu g sample seems to display an opposite trend in the distribution along radial directions, and has a smaller wave amplitude. Microsegregation of Cu exists in both 1g sample and mu g sample, and basically presents a gradually decreasing trend with the increase of solidification distance. Nevertheless, the degree of microsegregation in mu g sample is always lower. The above results suggest that under normal gravity condition, Cu element had a trend to enrich to central area under the effect of convection, and therefore, might contribute to enlarge dendrite spacing and increase microsegregation in that area.
资助项目	China manned space engineering[TGJZ800-2-RW024]
WOS研究方向	Engineering ; Thermodynamics ; Mechanics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000730170700001
资助机构	China manned space engineering
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/167313]
专题	金属研究所_中国科学院金属研究所
通讯作者	Luo, Xinghong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Kong, Yafei,Luo, Xinghong,Li, Yang,et al. Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2021,33(6):11.
APA	Kong, Yafei,Luo, Xinghong,Li, Yang,&Liu, Shi.(2021).Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy.MICROGRAVITY SCIENCE AND TECHNOLOGY,33(6),11.
MLA	Kong, Yafei,et al."Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy".MICROGRAVITY SCIENCE AND TECHNOLOGY 33.6(2021):11.