About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
Effect of Second Phase Particle Size on the Recrystallized Microstructure of Mg-Al Alloys Following ECAE Processing |
| Author(s) |
Suhas Eswarappa Prameela, Peng Yi, Vance Liu , Beatriz Medeiros, Laszlo Kecskes , Michael Falk, Timothy Weihs |
| On-Site Speaker (Planned) |
Suhas Eswarappa Prameela |
| Abstract Scope |
Mg alloys are excellent candidates for structural applications, given their high strength to weight ratios. Grain boundaries and precipitates can both contribute to strengthening in Mg alloys, but the design of high strength Mg alloys is challenging due to Mg’s anisotropic crystal lattice and yield asymmetry. Herein, we focus on thermomechanical processing that involves grain refinement in the presence of precipitates. We seek an understanding of how small and large Mg17Al12 intermetallic particles impact recrystallization and discontinuous precipitation in Mg-Al alloys. We do so by processing solution-treated and peak-aged Mg-9Al (wt.%) alloys using equal channel angular extrusion (ECAE) along the 4Bc route at 150 oC. We find that the fine nano precipitates that nucleate within the solutionized grain interiors during ECAE processing lead to finer Mg grains in the recrystallization regions compared to those in the presence of the long lathlike precipitates produced during peak aging prior to ECAE processing. |
| Proceedings Inclusion? |
Planned: |