The 3-dimensional morphology of dendrite during equiaxed solidification of an Al-5 wt.% Cu alloy
Ma, Xiaoping; Li, Dianzhong
Corresponding AuthorMa, Xiaoping(
AbstractIn 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.
KeywordEquiaxed dendrite 3-Dimensional morphology Competitive growth Coalescence Segregation
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000454506800002
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMa, Xiaoping
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
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.
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