About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Quantitative 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 phase-field simulation tool that investigates the corrosion mechanism of SS corrosion in an ICE, and determines the microstructural sensitive corrosion rate. With different ions diffusing in the oxide, charge neutrality and coupled current conditions are assumed to simulate how the electric potential affects diffusion and phase transformation. Strain energy induced during corrosion is coupled into the total energy functional and the stress divergence equation is solved. 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: |