|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||Preparation of Thin-walled Magnesium AZ31 Alloy Tubes Using Friction Stir Extrusion
||Vasanth Chakravarthy Shunmugasamy, Eisha Khalid, Bilal Mansoor
|On-Site Speaker (Planned)
We have prepared thin walled (400 micron) AZ31 Mg alloy tubes using friction stir extrusion (FSE). The adopted methodology utilizes a rotating tool that is plunged into the workpiece. The friction between tool and workpiece results in elevated temperature and the plunged tool pushes the metal up, to form a tube. The process resulted in a defect free, well consolidated tube. The tube wall showed refined grains on inner edges near to the tool, resembling a stir zone. The refined grains and resulting texture developed on inner edges of the tubes had a profound effect on the microhardness and corrosion response. Corrosion response based on immersion in Hanks salt solution for 48 hrs showed corrosion attack starting from tube outer edges then moving inward. The results from present work show FSE process has great potential to develop Mg alloy tubes that can be precursors for biodegradable stents.
||Magnesium, Biomaterials, Characterization