| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2024
|
| Presentation Title |
Ultrafine-grained Magnesium Alloys Manufactured by Multi-axial Forging: Elucidating Mechanisms of Achieving Both High Strength and High Ductility |
| Author(s) |
Andres J. Maldonado, Mathew R. Weaver, Devesh K. Misra |
| On-Site Speaker (Planned) |
Andres J. Maldonado |
| Abstract Scope |
Warm processing of magnesium (Mg) alloys is a challenge because Mg has a hexagonal close-packed (HCP) lattice with limited slip systems, which makes it difficult to plastically deform at low temperature. To address this challenge, an ingenious concept of combining annealing of as-cast alloy and multi-axial forging (MAF) was adopted for Mg alloys to obtain texture-free ultrafine-grained (UFG) structure with high strength-high ductility combination. We describe here the initial findings that indicated a distinct and fundamental transition in the deformation behavior of low strength coarse-grained (CG) rare earth element containing Mg alloy from twinning to strong and ductile UFG Mg alloy with basal and pyramidal dislocation slip. This implied the role of specific grain boundary states (grain boundary character distribution), grain orientation, and dislocation activity in governing the deformation mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Process Technology, Mechanical Properties |