|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Computational Design of Materials
||L-30: Diffusion Couple Experiments to Support the Development of a Diffusion Mobility Database for the Co-Al-W-Ni-Cr-Ta System
||Kil-won Moon, Greta Lindwall, Maureen Williams, Carelyn E. Campbell, Peisheng Wang, Ursula Kattner; Kil-won Moon, Greta Lindwall, Maureen Williams, Carelyn E. Campbell, Peisheng Wang, Ursula Kattner
|On-Site Speaker (Planned)
New γ/γ’ phase Co-based superalloys have the potential to increase the operating temperature for aerospace turbines as they have a higher γ’ solvus temperature and superior hot corrosion resistance, weldability and thermal fatigue resistance compared to currently used Ni-based superalloys. Developing reliable thermodynamic and diffusion mobility descriptions is critical for an advanced materials design of Co-based superalloys. A variety of diffusion couples from the Co-Al-W-Ni-Cr-Ta-Ti system were assembled to improve current mobility descriptions. Penetration curves were measured and analyzed from diffusion couples containing Co-8Cr, Co-1.3Ta, Ni-6Al, Ni-10Cr, Ni-3.5Ta and Ni-5W. The diffusion couple stacks were annealed at 900 șC, 1000 șC and 1100 șC for 1000 h, 240 h and 100 h, respectively. Integration of this new experimental data into the diffusion mobility database and comparison with published results will be presented.
||Planned: Supplemental Proceedings volume