|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Environmental Degradation of Multiple Principal Component Materials
||Modeling Preferential Dissolution during Aqeous Corrosion of Multi-principal Element Alloys
||Kang Wang, Bi-Cheng Zhou
|On-Site Speaker (Planned)
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.
||High-Entropy Alloys, Modeling and Simulation, Computational Materials Science & Engineering