Abstract
A model is presented to examine the effect of macroscopic redistribution on local microsegregation during solidification of in multicomponent alloys. The macroscopic effects are felt through local changes in mixture composition that can affect the solidification behavior and composition profiles of the alloys. Calculations were made for the solidification of two Al-Cu-Mg alloys for three cases in which the composition remains the same, decreases, or increases. Variations in composition lead to changes in composition profiles and relative amounts of different solid phases. The model in its present form can be used in conjunction with macroscopic solidification models and is the basis for more sophisticated microsegregation models.
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