|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Modeling of Corrosion and Mechanical Failure in Friction Stir Welded Magnesium-aluminum Vehicle Joints
||Kubra Karayagiz, Adam Powell, Qingli Ding, Donovan Leonard, Piyush Upadhyay, Brajendra Mishra
|On-Site Speaker (Planned)
Computational modeling tools are presented to study the various types of corrosion and mechanical failure in friction stir welded Al-Mg vehicle joints. 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, the electrochemical reactions at the metal-electrolyte interface, and the formation of hydroxide phases on the metal surface. Results for models of pitting corrosion and galvanic oxidation show qualitative agreement with experiments. Next, a finite element model is developed to study the effect of corrosion on joint performance. Mechanical properties of different regions (e.g., heat affected zone, stir region) are determined based on nanoindentation experiments, while the geometry of the mechanical hooks is extracted from the scanning electron microscopy images. Experiments are conducted for validation purposes.
||Modeling and Simulation, Magnesium, Computational Materials Science & Engineering