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Dependence of Dendritic Growth on Convention with PFM Simulation

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Abstract:

A binary alloy PFM (Phase-Field Model) which incorporates the flow field equations is constructed considering the dependence of microstructure on convention. Al-Cu binary alloy is investigated numerically based on the model, and the reasonable computational methods is studied for solving PFM, the effect of convention on dendritic growth and microsegregation patterns is implemented successfully. The computed results indicate that, the larger convention velocity U, the more developed the upstream dendritic branches is, and the more acutely the solute composition in the upstream dendritic solid fluctuates is. But the severity of microsegregation ahead of interface reduces. Nevertheless, the more undeveloped the downstream dendritic branches, the more acutely the solute composition in the the downstream dendritic solid fluctuates is, but the severity of microsegregation ahead of interface aggravates.

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Materials Modeling, Simulation, and Characterization View Preview

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Periodical:

Materials Science Forum (Volume 689)

Pages:

85-90

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.689.85

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Online since:

June 2011

Authors:

Chang Sheng Zhu, Jin Gui, Zhi Ping Wang, Feng Li

Keywords:

Convention, Denedritic Growth, Numerical Simulation, Phase-Field Method

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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