“…During DS casting of Ni-base superalloys, solidification usually occurred in the order of g dendrites, MC carbides and g/g 0 eutectics [18,21] . MC carbides were produced preferentially in the interdendritic regions where the liquid was enriched in Ta, Ti, Hf and C. Based on our present observations, the morphology evolution mechanism of MC carbides with increasing carbon content is proposed and illustrated in Fig.…”