About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2026
|
| Presentation Title |
Achieving high fracture toughness in Mg-Y-Zn alloys by controlling microstructural anisotropy and heterogeneity |
| Author(s) |
Soya Nishimoto, Koji Hagihara, Michiaki Yamasaki |
| On-Site Speaker (Planned) |
Soya Nishimoto |
| Abstract Scope |
Mg alloys are expected to be used as structural materials for transportation vehicles owing to their low densities. To expand their application as structural materials, their fracture toughness and tensile properties must be evaluated and improved. Recently, long-period stacking ordered (LPSO)-type Mg-Y-Zn alloys with excellent mechanical properties have been developed. Microstructure of the extruded Mg-Y-Zn alloys is characterized by multimodal microstructure that consists of dynamically recrystallized (DRXed) grains, worked grains, and LPSO phases. The DRXed grains comprise randomly oriented equiaxed grains. In contrast, the worked grains and LPSO phases exhibit strong fiber texture, extending in the extrusion direction. In this study, we attempted to control the multimodal microstructure by adjusting the extrusion conditions and alloy composition to develop high-strength and high-toughness Mg-Y-Zn alloys. Particular attention was paid to the effect of microstructural factors on fracture toughness and fracture behavior of the extruded Mg-Y-Zn alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Mechanical Properties, |