Solidification path in third-generation Ni-based superalloys, with an emphasis on last stage solidification

Differential thermal analyses along with microstructural characterization has been used to study the solidification path in the Ni-based superalloy CMSX 10 K. It was found that solidification initiates with freezing of primary γ dendrites, continues with a peritectic reaction resulting in nucleation and growth of γ′ particles in the interdendritic liquid, and terminates with the precipitation of fine lamellar [γ–γ′] phases between the coarsened γ′ particles.