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Numerical Modeling of Microstructure Evolution and Dendrite Growth for Al-Si Alloy Casting during Low Pressure Die Casting
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Numerical Modeling of Microstructure Evolution and Dendrite Growth for Al-Si Alloy Casting during Low Pressure Die Casting

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Abstract:

A modified Cellular Automaton model was presented to simulate the evolution of dendritic microstructure in low pressure die casting of Al-Si Alloy, which accounted for the heterogeneous nucleation, the solute redistribution both in liquid and solid, the interface curvature and the growth anisotropy during solidification. The free growth of single equiaxed dendrite and the evolution of multi dendrites with various crystallographic orientations were predicted. The variation of the dendrite tip velocity and local solute concentration at the solid/liquid interface were analyzed. The grain morphology of aircraft turbine wheel casting at different specimen points were predicted and compared with experimental results.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

1787-1792

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.1787

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Online since:

October 2007

Authors:

Bin Li, Qing Yan Xu, Bai Cheng Liu

Keywords:

Aluminium Alloy, Low Pressure Die Casting, Microstructure Simulation

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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