Abstract
Solute redistribution has been a long-term interest in solidification theoretical study, but its effect on growth rate during solidification is still not completely clear. Models that descript the relationship between growth rate and the alloy concentration remain controversial both qualitatively and quantitatively. This work theoretically analysed and investigated the solute redistribution and its effect on constitutional undercooling during solidification. Systematic analysis on the interaction behaviour between the solid/liquid interface movement and the solute distribution has been performed to clarify the effect of constitutional undercooling on growth rate of solid during solidification. It is demonstrated that the growth rate of crystals conversed to the alloy concentration and the relationship could be quantitatively calculated by the present model by introduction of the interface retardation.
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