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Nano-scale dendrites within the conventional dendritic arm
Ma, Xiaoping; Liu, Hongwei; Fu, Paixian; Li, Dianzhong
Corresponding AuthorMa, Xiaoping(xpma@imr.ac.cn)
2021-12-15
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume212Pages:9
AbstractThe microstructures and segregations during solidification have been widely recognized in the past researches. The dendrite (termed as conventional dendrite in this paper) was recognized as the most basic entity for microstructures and microsegregation. Through careful analysis and observation in this paper, new nano-scale dendrites (with dendritic arm spacing about 500 nm) were revealed within the conventional dendritic arm (with dendritic arm spacing about 70 mu m). The conventional dendrites should be recognized as macrosegregation patterns arisen in a subtle porous media. Accordingly, the research entity for microsegregation should change from the conventional dendritic arm to a more subtle entity. During solidification, temperature fluctuations with different directions, periods and intensities will superimpose to induce a dendritic temperature field on multi-scales. Because of differentiated solid frac-tions and liquid compositions, a dendritic macrosegregation field on multi-scales will be induced by the mass transfer. Verified by the in situ and real time observation, the subtle dendrites emerge at the later solidification stage much lower than the equilibrium eutectic temperature. Because nano-scale dendrites were recognized, new solutions were proposed for controlling macrosegregation within the conventional dendritic arm. In a more significant view, the nano-scale dendrites provide the basis for unifying the non-equilibrium solidification and the equilibrium solidification. (C) 2021 The Authors. Published by Elsevier Ltd.
KeywordSolidification Dendrite Microstructures Microsegregation Macrosegregation Multi-scales
Funding OrganizationYouth Talent Project of Shenyang National Laboratory for Materials Science
DOI10.1016/j.matdes.2021.110263
Indexed BySCI
Language英语
Funding ProjectYouth Talent Project of Shenyang National Laboratory for Materials Science[L2019F46] ; Youth Talent Project of Shenyang National Laboratory for Materials Science[TC190A4DA/35]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000744257300007
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173624
Collection中国科学院金属研究所
Corresponding AuthorMa, Xiaoping
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Ma, Xiaoping,Liu, Hongwei,Fu, Paixian,et al. Nano-scale dendrites within the conventional dendritic arm[J]. MATERIALS & DESIGN,2021,212:9.
APA Ma, Xiaoping,Liu, Hongwei,Fu, Paixian,&Li, Dianzhong.(2021).Nano-scale dendrites within the conventional dendritic arm.MATERIALS & DESIGN,212,9.
MLA Ma, Xiaoping,et al."Nano-scale dendrites within the conventional dendritic arm".MATERIALS & DESIGN 212(2021):9.
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