| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Developing a Crystal-based Tribocorrosion Modeling Framework for Aluminum: An Integrated Experimental and Computational Study |
| Author(s) |
Kaiwen Wang, Zhengyu Zhang, Raja Shekar B. Dandu, Wenjun Cai |
| On-Site Speaker (Planned) |
Zhengyu Zhang |
| Abstract Scope |
Aluminum (Al) and its alloys are renowned for their exceptional resistance to corrosion in neutral aqueous solutions, thanks to their ability to maintain passivity over time. However, the combined action of corrosion and stress, such as stress corrosion cracking and tribocorrosion, poses a significant risk to the integrity of Al materials. To gain a deeper understanding of this phenomenon, we conducted a comprehensive investigation using single crystal aluminum specimens. Our study aimed to develop a stress corrosion model that considers the influence of lattice reorientation and dislocations on surface corrosion. Electron backscattered diffraction (EBSD) was employed to analyze lattice rotation and dislocation density. Using the experimental data as a basis for validation, we developed a multiphysics finite element model that successfully predicted the depassivation and repassivation currents observed during tribocorrosion. This model mapped the local corrosion kinetics, considering factors such as passivation state, crystallographic orientation, and dislocation density. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Environmental Effects, Aluminum |