| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Creep Behavior of an Al-Zr-Sn Alloy Dual-Strengthened by L12-Al3Zr Nanoscale Precipitates and Cold Working |
| Author(s) |
Sumit Bahl, Ismael Coello Ramirez, Jie Qi, Jovid U. Rakhmonov, David C. Dunand, Amit Shyam |
| On-Site Speaker (Planned) |
Sumit Bahl |
| Abstract Scope |
Electrical conductor Al alloys with high creep resistance in the low to intermediate temperature range (100 – 200 °C) can enable electric vehicle lightweighting for enhanced efficiency and driving range. Improving creep resistance of conductor Al alloys is a challenge due to trade-off between strength and electrical conductivity. In this work, we explored the possibility of combining nanoscale precipitation and cold working to improve the creep resistance of an Al-Zr-Sn alloy while maintaining high electrical conductivity. The cast Al-Zr-Sn alloy was aged to induce nanoscale L12-Al3Zr precipitation followed by room-temperature swaging with up to 90% area reduction. Compression creep tests at 200 °C demonstrated improved creep resistance of the dual-strengthened (aged + cold worked) alloy compared to commercial baseline conductor Al alloys. The improved creep performance is rationalized with microstructural characterization using electron backscatter diffraction and atom probe tomography. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Mechanical Properties, Characterization |