Effect of cooling rate on the segregation and liquid density of Waspaloy alloy during solidification process

Remelting tests at different cooling rates for Waspaloy alloy were performed and the effect of cooling rate on the segregation behavior and the liquid density of Waspaloy alloy during solidification process was systematically investigated by SEM and EDAX. The results show that the element segregation decreases with increasing cooling rate and Ti segregation is the most serious during solidification which is a positive segregation element and congregates in interdendritic area. The liquid density exhibits an in-version trend due to the element segregation. The maximum liquid density inversion occurs near the solidification temperature of 1 300℃.