| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Thermodynamics, Phase Equilibria and Kinetics for Materials Design and Engineering
|
| Presentation Title |
Diffusion Mobilities in Co-Ni-Al-Cr System |
| Author(s) |
Kil-Won Moon, Carelyn E. Campbell |
| On-Site Speaker (Planned) |
Kil-Won Moon |
| Abstract Scope |
As a part of on-going effort to develop CALPHAD-based thermodynamic and diffusion databases for Co-based alloys, currently available diffusion mobility descriptions and experimental diffusion couple data are used to assess the mobility parameters of the FCC phase in Co-Ni-Al-Cr system at 1000 ºC and 1200 ºC. The current work optimizes the mobilities parameters by direct comparison with experimental profiles instead of derived diffusion coefficients from the experimental profiles. This method is particularly useful for using multicomponent diffusion couple data, where it is often difficult to obtain accurate diffusion coefficients that require the crossing of multiple diffusion paths. Efficient optimization of the mobility parameters using the experimental profiles directly does require a data smoothing process and defining a common Matano interface for the experimental and computed profiles. These processes are demonstrated within the optimization of the Co-Ni-Al-Cr system. The results of the optimized mobility parameters are presented. |
| Proceedings Inclusion? |
Undecided |