On macrosegregation in a binary alloy undergoing solidification shrinkage

Abstract The one-dimensional transient solidification of a binary alloy undergoing shrinkage is well-known as an invaluable benchmark for the testing numerical codes that model macrosegregation. Here, recent work considered small-time behaviour this problem extended until complete solidification, thereby determining solute profile across entire solidified domain. solution used initial condition integration having three moving boundaries. Of particular significance so-called inverse segregation observed at start and extreme end; in case example presented, which often-cited Al–Cu system, macrosegregation found to be positive or negative, depending on whether Scheil’s equation lever rule assumed microscale, respectively. relevance these results modelling steady-state continuous casting processes – particular, phenomenon centreline also discussed.