Eliminating topologically closed-packed phases in deteriorated nickel-based superalloy by pulsed electric current

This work investigates the reverse thermodynamic dissolution of the topologically closed-packed (TCP) phases in the deteriorated nickel-based superalloy using the pulsed electric current. The mechanical properties cannot be restored directly by the conventional heat treatment because the dissolution temperature (1130 °C) of the TCP phases is higher than the initial solvation temperature (950 °C) of the γ′ phase. Here it was found that the TCP...