Quantitative Phase-field Simulation of Dendritic Equiaxed Growth and Comparison with in Situ Observation on Al-4 wt.% Cu Alloy by Means of Synchrotron X-ray Radiography

IMR OpenIR

	Quantitative Phase-field Simulation of Dendritic Equiaxed Growth and Comparison with in Situ Observation on Al-4 wt.% Cu Alloy by Means of Synchrotron X-ray Radiography
	Y. Chen; D. Z. Li; B. Billia; H. Nguyen-Thi; X. B. Qi; N. M. Xiao
	2014
发表期刊	Isij International
ISSN	0915-1559
卷号	54 期号:2 页码:445-451
摘要	Dendritic equiaxed growth from the melt by continuous cooling-down is investigated by quantitative 2D phase-field simulations. The results are compared with detailed data from solidification experiments on Al-4 wt.% Cu alloy with in situ X-ray monitoring. In a first step, the simulation of an isolated equiaxed alloy dendrite growing freely in <100>-direction in the melt is performed. Then, the impingement between two grains is considered by simulating two dendritic crystals growing towards each other in <100>-direction. From the phase-field simulations, the time evolution of the equiaxed crystals is characterized by measuring the lengths and tip velocities of the primary dendrite arms in free growth and in the presence of neighbor interaction, which enables the analysis of growth dynamics. In a second part, the results of the phase-field simulations are compared to data extracted from an experiment on Al - 4 wt.% Cu alloys carried out at the European Synchrotron Radiation Facility (ESRF), with in situ and real-time characterization by means of X-ray radiography, and to analytical relationship for dendrite tip growth. The limitations of 2D-phase-field simulations to fully describe the dynamic formation and interaction of dendritic equiaxed grains are briefly discussed.
部门归属	[chen, yun ; li, dian zhong ; qi, xin bo ; xiao, na min] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [billia, bernard ; nguyen-thi, henri] aix marseille univ, im2np, f-13397 marseille 20, france. [billia, bernard ; nguyen-thi, henri] cnrs, umr 7334, im2np, f-13397 marseille, france. ; li, dz (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; dzli@imr.ac.cn
关键词	Phase-field Simulation Dendritic Equiaxed Growth Grain Interaction Solidification Alloy In Situ Synchrotron imagIng Directional Solidification Initial Transient Convection Anisotropy Interface
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72537
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Chen,D. Z. Li,B. Billia,et al. Quantitative Phase-field Simulation of Dendritic Equiaxed Growth and Comparison with in Situ Observation on Al-4 wt.% Cu Alloy by Means of Synchrotron X-ray Radiography[J]. Isij International,2014,54(2):445-451.
APA	Y. Chen,D. Z. Li,B. Billia,H. Nguyen-Thi,X. B. Qi,&N. M. Xiao.(2014).Quantitative Phase-field Simulation of Dendritic Equiaxed Growth and Comparison with in Situ Observation on Al-4 wt.% Cu Alloy by Means of Synchrotron X-ray Radiography.Isij International,54(2),445-451.
MLA	Y. Chen,et al."Quantitative Phase-field Simulation of Dendritic Equiaxed Growth and Comparison with in Situ Observation on Al-4 wt.% Cu Alloy by Means of Synchrotron X-ray Radiography".Isij International 54.2(2014):445-451.