About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
Presentation Title |
Modeling Preferential Dissolution during Aqeous Corrosion of Multi-principal Element Alloys |
Author(s) |
Kang Wang, Bi-Cheng Zhou |
On-Site Speaker (Planned) |
Kang Wang |
Abstract Scope |
Aqueous corrosion consists of intertwined processes of electrochemical/chemical reactions at anode and cathode, mass/charge transport in aqueous solution, and migration of metal/electrolyte interface. Previous modeling efforts mostly focus on the overall corrosion rate and morphological evolution of the metal/electrolyte interface, while the role of individual alloy elements leading to the preferential dissolution of multi-component alloys is rarely considered. Here, we apply the principles of non-equilibrium thermodynamics to model the kinetics at the metal/electrolyte interface and incorporate the multiple internal dissipation processes of alloy elements by thermodynamic variation of entropy functional. Coupled with CALPHAD-type thermodynamic and kinetic databases, the current work is applied to Ni38Fe20Cr22Mn10Co10 alloy to analyze the preferential dissolution and the corresponding predominant reaction mechanisms. With enhanced capability for multi-component alloys, the current work brings corrosion theories primarily for simple metals (e.g., pure metals and binary alloys) closer to real-life applications for commercial alloys in aqueous environments. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Modeling and Simulation, Computational Materials Science & Engineering |