About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
O-12: Quantitative Electrochemical Phase-field Modeling for Corrosion of Engine Materials at High Temperature |
Author(s) |
Xueyang Bognarova, Michael Tonks |
On-Site Speaker (Planned) |
Xueyang Bognarova |
Abstract Scope |
The stainless steel (SS) valve materials in an internal combustion engine (ICE) environment can undergo microstructural evolution that sensitizes the material to corrosion and fatigue. The industry currently employs a conservative material selection approach that usually results in over-design and increased cost. The goal of this work is to develop a mesoscale electrochemical phase-field simulation tool that investigates the mechanism of SS corrosion in an ICE, and determines the microstructural sensitive corrosion rate. Different oxide species observed in the experimental characterizations are included. With different ions diffusing, charge neutrality and coupled current conditions are assumed to simulate how the electric potential affects corrosion. In 2-D simulations, the influences of microstructure such as grain boundary and void are considered. The phase-field model is implemented using the Multiphysics Object Oriented Simulation Environment (MOOSE), an open-source finite-element framework. The predicted corrosion rate has been verified against analytical models and validated against experimental data. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Phase Transformations |