About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2027
|
| Presentation Title |
Effect of Tool Traverse Speed on Microstructure, Texture, and Related Mechanical and Corrosion Property Enhancement in ZK60 Magnesium Alloy During Friction Stir Processing |
| Author(s) |
Prakash Chandra Gautam, Hsin-Chih Lin |
| On-Site Speaker (Planned) |
Prakash Chandra Gautam |
| Abstract Scope |
A strain-rate-controlled friction stir processing strategy was employed to enhance the strength-ductility-corrosion synergy of extruded ZK60 magnesium alloy by varying the tool traverse speed (100–200 mm/min). Increasing traverse speed increased strain rate and reduced heat input, promoting finer dynamically recrystallized grains, weaker basal texture, enhanced Σ13a CSL boundaries, and dissolution of MgZn2 precipitates. FSP also induced lattice rotation from prismatic/pyramidal to basal orientations. The deformation mechanism changed from slip-dominated flow in the extruded alloy to extension twinning-assisted deformation after FSP. While the yield strength decreased at low traverse speed due to early twin activation, it recovered at higher traverse speeds through grain refinement, accompanied by improved ultimate tensile strength and ductility. The sample processed at 200 mm/min exhibited the best strength-ductility combination and the highest corrosion resistance, with over an order-of-magnitude reduction in corrosion current density, attributed to refined microstructures, increased Σ13a CSL boundaries, and reduced micro-galvanic coupling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Mechanical Properties, Biomaterials |