| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Enhanced Strength and Thermal Stability in Oxide Dispersion Strengthened Nanostructured Aluminum Alloys |
| Author(s) |
Jason Trelewicz, Wenbo Du, Bin Cheng, Cormac Killeen, David J. Sprouster |
| On-Site Speaker (Planned) |
Jason Trelewicz |
| Abstract Scope |
High specific strength materials are critical for enhancing performance and efficiency in a broad range of applications such as next generation aerostructures and hypersonic vehicles but are often limited by the low relative strength often accompanying the reduction in density. In this work, we combined targeted alloying for stabilizing nanocrystalline grains in aluminum with powder metallurgical processing advances that trigger an exothermic reaction during sintering to facilitate densification at low homologous temperatures. The resulting bulk nanostructured alloy is shown to contain nano-oxides dispersed in a nanocrystalline Al-Mg matrix with a highly stable grain size of < 50 nm up to 500 °C and a strength double that of the aerospace grade Al alloys. In a broad sense, this reactive sintering technology enables the production of bulk, thermally stable nanoarchitectured alloys with amplified strengthening due to a confluence of mechanisms from extreme Hall-Petch strengthening combined with nano-oxide induced matrix dispersion strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Aluminum, Other |