|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Enhanced Corrosion Resistance of an AZ31 Magnesium Alloy through Shear Extrusion
||Vikrant Kumar Beura, Vineet V Joshi, Kiran N. Solanki
|On-Site Speaker (Planned)
||Vikrant Kumar Beura
Magnesium alloys with a better corrosion resistance are in high demand in the field of aerospace and automotive sectors to improve fuel efficiency and reduce carbon footprint. In this work, the AZ31B magnesium has been processed through the friction extrusion processing technique to improve the corrosion resistance. The friction extrusion processed AZ31B sample microstructure consists of equiaxed grains, fragmented and homogenously distributed Al8Mn5 cathodic phases, and a tilted basal texture. The corrosion behavior of the friction extrusion processed alloys was analyzed and compared to the feed extruded and cast AZ31B alloys. A reduced anodic reaction rate with noble breakdown potential was observed in the friction extrusion processed alloy through the potentiodynamic polarization test. Moreover, a protective and coherent protective film was characterized through electrochemical impedance spectroscopy measurement (EIS) and X-ray photoelectron spectroscopy technique (XPS). Post-corrosion microstructures were analyzed to elucidate the underlying corrosion mechanism.