LAUSR

A large-scale cylindrical 2219 Al alloy ingot (1 250 mm in diameter and 3 300 mm in length) is manufactured using a special DC casting facility. Macrosegregation of major element (Cu) at different casting stages is determined on three cross-sections of as-cast ingot. Meanwhile, the evolution of temperature filed in the sump is simulated at different casting stages. Further, the relationships, between macrosegregation, temperature field, and grain structures, are investigated. These work provide some insights in the macrosegregation formation during large-scale casting or solidification, further promoting to manufacture the large-scale metallic ingots for potential application.