| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Computation Assisted Materials Development for Improved Corrosion Resistance
|
| Presentation Title |
Computational Modeling of Corrosion and Mechanical Failure in Magnesium-Aluminum Vehicle Joints |
| Author(s) |
Kubra Karayagiz, Adam Powell, Qingli Ding, Brajendra Mishra |
| On-Site Speaker (Planned) |
Kubra Karayagiz |
| Abstract Scope |
The joining of Al and Mg is challenging due to galvanic corrosion, a common issue in dissimilar metal joints. While the advanced joining technologies, such as friction stir welding, produce fine-grained microstructure leading to slower corrosion, a better understanding of corrosion mechanisms on performance is needed for widespread adoption of this technique in the auto industry. Computational modeling tools to study the corrosion and mechanical failure in friction stir welded Al-Mg vehicle joints are presented in this work. First, a phase-field model to study corrosion in Al-Mg joints is developed. The model accounts for the conservation of charge, transport of ions in the electrolyte, and the electrochemical reactions at the metal-electrolyte interface. Next, a finite element model is developed to study the effect of corrosion on joint performance. The geometry of the mechanical hooks is extracted from the scanning electron microscopy images. Experiments are conducted for validation purposes. |