Paper Title:
Modeling of Microstructure Development in a Continuously Solidified Immiscible Alloy
  Abstract

A model is developed to analyze the microstructure evolution in a continuously solidified immiscible alloy. The model takes into account the common actions of the nucleation and the diffusional growth/shrinkage of the minority phase droplets, the spatial phase segregation and the convections of the melt. The microstructure formation in a continuously solidified immiscible alloy is calculated. The numerical results demonstrate that the convective flow has great effect on the microstructure evolution. The convective flow against the solidification direction causes an increase in the nucleation rate while the convective flow along the solidification direction causes a decrease in the nucleation rate of the minority phase droplets. The convective flow leads to a more nonuniform distribution of the minority phase droplets in the melt. It causes an increase in the size of the largest minority phase droplet and is against the obtaining of the immiscible alloys with a well dispersed microstructure.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1536-1539
DOI
10.4028/www.scientific.net/MSF.654-656.1536
Citation
J. Z. Zhao, H. L. Li, Q. L. Wang, "Modeling of Microstructure Development in a Continuously Solidified Immiscible Alloy", Materials Science Forum, Vols. 654-656, pp. 1536-1539, 2010
Online since
June 2010
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Price
$32.00
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