Channel Segregation in Alloy Ingots

摘要

General patterns of fluid flow are considered for various geometrical arrangements with interdendritic liquid either less or more dense than bulk liquid. The incidence of channel formation is described and mechanisms discussed for channel nucleation, propogation and prevention. It is concluded that channels form by perturbation of the bulk liquid from regions close to the dendritic growth front and the relevance of this model is discussed.