Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations

doi:10.1016/j.jallcom.2024.176259

IMR OpenIR

	Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations
	Gong, Tongzhao 1; Chen, Yun 1; Li, Dianzhong 1; Hao, Weiye 1,2; Fan, Weiqi 1,2; Reinhart, Guillaume 3; Cao, Yanfei 1; Chen, Xing-Qiu 1; Nguyen-Thi, Henri 3
通讯作者	Chen, Yun(chenyun@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
	2024-11-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1006 页码:12
摘要	Formation of a dendritic grain starts from nucleation and then growth propagation occurs. Through the in situ and real-time solidification experiments of Al-Cu alloys observed by synchrotron X-ray imaging, it is found that the early-stage free growth rate of dendritic grains goes far beyond the concept described by the classical crystal growth theory. The rate gradually drops down even though the liquid is continuously cooled down. Quantitative 3D phase-field simulations demonstrate that this abnormal early-stage growth behavior depends strongly on the nucleation. A critical nucleus can grow rapidly to a peak rate driven by the initial nucleation undercooling, and then its rate gradually drops down to a minimum before it approaches the steady-state free growth regime. This strong dependence of the early-stage growth on the nucleation is then supported by an analytical model, and this correlation enables the accurate identification of the nucleation undercooling for each grain in the experiment and thus allows for a large-scale quantitative simulation of the real-time observed polycrystalline growth. This progress provides a comprehensive understanding on the crystal growth kinetics from a critical nucleus to the growth end, and thus will provide a new theoretical framework to design novel technology to control the solidification microstructures.
关键词	Solidification Equiaxed dendritic growth Nucleation undercooling In situ and real-time observation Phase-field simulation
资助者	National Science and Technology Major Project ; National Natural Science Foundation of China ; China Post-doctoral Science Foundation ; Youth Talent Program of Shenyang National Laboratory for Materials Science ; French National Space Center (CNES)
DOI	10.1016/j.jallcom.2024.176259
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[J2019-VI-0019-0134] ; National Natural Science Foundation of China[52203301] ; China Post-doctoral Science Foundation[2021TQ0335] ; Youth Talent Program of Shenyang National Laboratory for Materials Science ; French National Space Center (CNES)[174800/00]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001307824900001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189712
专题	中国科学院金属研究所
通讯作者	Chen, Yun; Li, Dianzhong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Aix Marseille Univ, Univ Toulon, CNRS, IM2NP, Marseille, France
推荐引用方式 GB/T 7714	Gong, Tongzhao,Chen, Yun,Li, Dianzhong,et al. Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,1006:12.
APA	Gong, Tongzhao.,Chen, Yun.,Li, Dianzhong.,Hao, Weiye.,Fan, Weiqi.,...&Nguyen-Thi, Henri.(2024).Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations.JOURNAL OF ALLOYS AND COMPOUNDS,1006,12.
MLA	Gong, Tongzhao,et al."Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations".JOURNAL OF ALLOYS AND COMPOUNDS 1006(2024):12.