|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||E-18: Corrosion Properties of Friction Stir Processed Cast Mg-alloys
||Rajib Kalsar, David Garcia, Hrishikesh Das, Venkateshkumar Prabhakaran, Glenn J. Grant, Darrell R. Herling, Mageshwari Komarasamy, Vineet V. Joshi
|On-Site Speaker (Planned)
||Vineet V. Joshi
In this study, friction stir processing (FSP) has been utilized to modify the microstructure of high pressure die cast (HPDC) AZ91 Mg-alloy for improved corrosion properties. Processing parameters were optimized to obtain homogenous microstructure as well as defect-free processed region. A microscopic droplet-based measurement technique, called scanning electrochemical cell microscopy (SECCM) was utilized to measure the location-specific electrochemical properties. A theta probe with approximately 10 Ám diameter was used to measure the electrochemical properties of Mg alloys from the base metal to the processed zone. Electrochemical analysis showed the processed zone is more cathodic compared to the base metal. Relatively higher cathodic nature of the processed zone indicates an improvement in the corrosion properties of the friction stir processed Mg alloys. Detailed microstructural characterization was carried out to correlate the microstructural features with the microscopic electrochemical response.