A study on the microstructural evolution of a Ni-based superalloy, Allvac 718Plus, in the forged condition, was performed by varying the solutionizing temperature. Different solutionizing temperatures were chosen to obtain different fractions of the gamma prime (Ni3(Al,Ti,Nb), γ’) and delta (Ni3Nb, δ) phase precipitates. The solutionizing temperatures ranged between 945°C to 1100°C. After solutionizing, the samples were subjected to a standard two-step aging treatment (788°C for 8h followed by 704°C for 8h). The 954°C solutionizing treatment resulted in incomplete dissolution of the γ’ phase and a relatively high volume fraction of the δ phase, which formed preferentially at grain boundaries. The γ’ phase was completely dissolved during each of the other three solutionizing treatments (1000°C, 1050°C, and 1100°C), while the fraction of the δ phase decreased with increasing solutionizing temperature. The 1100°C solutionizing treatment led to significant growth of the matrix grains (Ni (FCC), γ).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.