The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy

doi:10.1016/j.jmst.2018.09.042

IMR OpenIR

	The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy
	Ma, Xiaoping; Li, Dianzhong
通讯作者	Ma, Xiaoping(xpma@imr.ac.cn)
	2019-03-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	35 期号:3 页码:239-247
摘要	In a sample quenched during equiaxed solidification of an Al-5 wt.% Cu alloy, the multi-scales 3-dimensional morphology of equiaxed dendrite was observed. The slim primary stem and secondary branches constitute the frame of dendrite, and rows of dense tertiary branches further divide the 3-dimensional space. In the divided space, the quartic branches grow further. The dendritic branches, which are perpendicular to each other, can change their growth directions and coalesce into a whole. In the tertiary branches and quartic branches, the formation of double branch structures is induced by competitive growth. The branch that wins in the competitive growth will produce a cabbage-like structure by wrapping the failed branches. In addition, the side branch can also wrap the original parent branch to produce cabbage-like structures. Depending on the historical growth direction, the dendritic arms can form vein-like and spicate structures, and the shapes of single dendritic arm may be the cylinder, plate and trapezoid platform. According to the compositions and etching morphology, the single dendritic arm in the final solidification structures should coalesce from a fine porous structure. The porous structures at different length-scales are principally induced by the preferential growth. Based on 3-dimensional morphology of equiaxed dendrite, a new research object for the investigation of microsegregation was suggested. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Equiaxed dendrite 3-Dimensional morphology Competitive growth Coalescence Segregation
DOI	10.1016/j.jmst.2018.09.042
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000454506800002
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/131049
专题	中国科学院金属研究所
通讯作者	Ma, Xiaoping
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xiaoping,Li, Dianzhong. The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(3):239-247.
APA	Ma, Xiaoping,&Li, Dianzhong.(2019).The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(3),239-247.
MLA	Ma, Xiaoping,et al."The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.3(2019):239-247.