Modification of mathematical analyses and related physical descriptions used to describe channel segregation

Vaughan R Voller, J. J. Moore, N. A. Shah

Research output: Contribution to journalArticlepeer-review

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Abstract

The aim in this paper is to develop further and extend the application of the mathematical descriptions based on the previously developed local solute redistribution equation’ for the alloy-solidification process. To this end, a modified local solute redistribution equation for unidirectional solidification is presented and, using channel perturbation analysis based on this equation, a condition is developed for unstable flow and possible channel segregation which relates the interdendritic fluid velocity to the isotherm velocity. On assuming this condition to hold, a physical description related to the modified local solute redistribution equation is proposed, and a possible mechanism is presented for local remelting and the formation of channel segregation.

Original languageEnglish (US)
Pages (from-to)81-84
Number of pages4
JournalMetals Technology
Volume10
Issue number1
DOIs
StatePublished - Mar 1 1983

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