About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
CALPHAD-Enabled Design of a Compact Morphology Cobalt-Based Superalloy for Additive Manufacturing |
Author(s) |
Krista Biggs, Brandon Snow, Julio Cesar Pereira dos Santos, Gregory Olson |
On-Site Speaker (Planned) |
Krista Biggs |
Abstract Scope |
Additively manufacturing superalloys is an attractive option in aerospace applications which require strong, oxidation resistant alloys at high temperatures, for its capacity to fabricate components with reduced material waste and optimized geometries for lightweighting. We have designed a novel cobalt-based superalloy to operate at 900 ⁰C, inspired by Cozar and Pineau’s Inconel 718-based compact morphology alloy, which incorporates multiple reinforcement phases for improved printability and resistance to coarsening compared to traditional γ-γ’ microstructures. The structural and kinematic considerations for selecting appropriate phases are discussed, considering the shear field which surrounds a precipitating γ’ particle due to its lattice mismatch with the matrix phase. Additionally, the relative phase fractions of the reinforcements are tuned to minimize the strain energy of the system resulting from the precipitates’ formation. The designed prototypes and the kinetics of forming their resulting microstructures are then assessed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Copper / Nickel / Cobalt |