About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
Presentation Title |
Corrosion and Mechanical Behavior of High-Entropy Alloys |
Author(s) |
Michael C. Gao, Alvaro Rodriguez, Zongrui Pei, Joseph Tylczak, Paul Jablonski, Martin Detrois, Margaret Ziomek-Moroz, Jeffrey Hawk |
On-Site Speaker (Planned) |
Michael C. Gao |
Abstract Scope |
Many high entropy alloys (HEAs) with the face-centered cubic structure are reported to have excellent ductility and corrosion resistance. In this talk, the corrosion behavior of select FCC HEAs in NaCl and NaCl+CO2 aqueous conditions at 25 and 40 degree Celsius will be presented. Their corrosion parameters (corrosion rate, current, etc.) are compared to those of commercial alloys (C-276, stainless steel 316L and Multimet). Electrochemical measurements can show additional corrosion characteristics. Potentiodynamic polarization measurements can indicate active, passive and transpassive behavior of the metal as well as potential susceptibility to pitting corrosion. Cyclic voltammetry can confirm the alloy susceptibility to pitting corrosion. Electrochemical impedance spectroscopy elucidates the corrosion mechanism under studied conditions. The tensile behavior of these alloys at various temperatures are also reported. To elucidate the corrosion and mechanical behavior, the atomic structure, elastic properties, and stacking faults energies of these HEAs are predicted using density functional theory methods. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Environmental Effects, Modeling and Simulation |