|About this Abstract
|10th International Symposium on Superalloy 718 and Derivatives (2023)
|Superalloy 718 and Derivatives
|Understanding Annealing Behavior during Post-build Heat Treatment of Ni-based Alloys Across Additive Manufacturing Processes
|Juan Gonzalez, Yi Zhang, Andrew Wessman, Jonah Klemm-Toole
|On-Site Speaker (Planned)
Ni-based alloys are used for high temperature structural components that span from small, highly complex, with fine feature resolution to large, simple shapes with low dimensional tolerances. Accordingly, a range of additive manufacturing (AM) processes from high precision laser powder bed fusion (LPBF) to high deposition rate wire arc additive manufacturing (WAAM) can be used to produce components. However, the microstructure evolution during post processing varies considerably between LPBF and WAAM. In this presentation, we show how the annealing responses during post build heat treatment systematically vary in LPBF and WAAM IN625 and Haynes 282. Despite suggestions in literature, primary carbides do not control the recrystallization behavior in these alloys. Differences in stored energy in the as built condition, which is heavily influence by AM process, has the greatest effect on recrystallization behavior. The implications of these results on microstructure control in AM Ni-based alloys is discussed.
|Definite: At-meeting proceedings