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	Numerical simulation of dendrite microstructure for Al-Si alloy with additive phase
	Li Bin ; Xu Qingyan ; Liu Baicheng
	2010-05-10 ; 2010-05-10
关键词	particle pushing dendritic growth microstructure numerical simulation CELLULAR-AUTOMATON MODEL METAL-MATRIX COMPOSITES PARTICLE PUSHING MODEL SOLID/LIQUID INTERFACE SOLIDIFYING INTERFACES SI/SICP COMPOSITES CERAMIC PARTICLES SOLIDIFICATION ENGULFMENT GROWTH Metallurgy & Metallurgical Engineering
中文摘要	The interaction between spherical particles and dendrites, and the process of microstructure formation including particle distribution for Al-7.0%Si (mass fraction) alloy with additive SiC particles were simulated. Based on heat and solute conservations, the solute redistribution, interface curvature and anisotropy were considered. Particle, solid, liquid as well as solid/liquid interface were treated respectively. The numerical models that describe the interaction between single particle/multiple particles and dendrites were established. The engulfment/pushing phenomena between single particle and solidification interface were predicted, and solute concentration field and velocity held of the growing dendrites and solid/liquid interface shape close to particle were studied. The interaction process between multiple particles and dendrites, and the segregation of particles into the interdendrite regions were recurred. The simulated results show that the interaction between particles and advancing curved solid/liquid interfaces is non-steady state when the particle is pushed, while it can be treated as steady pushing mode when solidification velocity is lower than critical velocity. The simulated results of dendrite microstructure and particle distribution are in good agreement with the experimental ones.
语种	中文 ; 中文
出版者	SCIENCE CHINA PRESS ; BEIJING ; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24230]
专题	清华大学
推荐引用方式 GB/T 7714	Li Bin,Xu Qingyan,Liu Baicheng. Numerical simulation of dendrite microstructure for Al-Si alloy with additive phase[J],2010, 2010.
APA	Li Bin,Xu Qingyan,&Liu Baicheng.(2010).Numerical simulation of dendrite microstructure for Al-Si alloy with additive phase..
MLA	Li Bin,et al."Numerical simulation of dendrite microstructure for Al-Si alloy with additive phase".(2010).

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