Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy

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	Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy
	Y. Chen; A. A. Bogno; B. Billia; X. H. Kang; H. Nguyen-Thi; D. Z. Li; X. H. Luo; J. M. Debierre
	2010
发表期刊	Isij International
ISSN	0915-1559
卷号	50 期号:12 页码:1895-1900
摘要	The initial transient in directional solidification of Al-4wt%Cu alloy by cooling-down is investigated by numerical simulation using the phase-field model proposed by Karma (Phys Rev Lett 87 (2001) 115701) which includes solute antitrapping in mass conservation relation and is solved by the adaptive finite element method The simulated velocity of the unsteady planar solidification interface and the solute profile in the liquid are always close to the predictions of the Warren Langer analytical model of initial solidification transient (Phys Rev E 47 (1993) 2702) but only in the very beginning of growth in fair quantitative agreement with the experimental data obtained by means of in situ and real time X-ray radiography at the European Synchrotron Radiation Facility (ESRF) Then the influence of gravity-driven fluid flow becomes significant in experiments and increases with time In the phase field simulations once the smooth solidification front has lost morphological stability in the initial solidification transient the evolution of the non-planar solid-liquid interface microstructure varies with the processing control parameters It is found that the solid liquid interface shape changes through transitions from flat to cellular cellular to dendritic cellular or dendritic to seaweed depending on the values of the applied cooling rate and temperature gradient
部门归属	[chen, yun; kang, xiu hong; li, dian zhong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [chen, yun; bogno, abdoul-aziz; billia, bernard; nguyen-thi, henri; debierre, jean-marc] aix marseille univ, im2np, f-13397 marseille 20, france. [chen, yun; bogno, abdoul-aziz; billia, bernard; nguyen-thi, henri; debierre, jean-marc] cnrs, f-13397 marseille 20, france.;chen, y (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Directional Solidification Alloys Initial Transient Microstructure Transition Phase-field Modeling Al-cu Alloy Synchrotron x Ray Imaging Free Dendritic Growth Finite-element-method Binary Alloy Numerical Simulations Crystal-growth Cu Alloy Computation Prediction Stability
URL	查看原文
WOS记录号	WOS:000285666400024
引用统计	被引频次：15[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/321006/31035
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Chen,A. A. Bogno,B. Billia,et al. Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy[J]. Isij International,2010,50(12):1895-1900.
APA	Y. Chen.,A. A. Bogno.,B. Billia.,X. H. Kang.,H. Nguyen-Thi.,...&J. M. Debierre.(2010).Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy.Isij International,50(12),1895-1900.
MLA	Y. Chen,et al."Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy".Isij International 50.12(2010):1895-1900.