| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Additive Manufacturing of Advanced Aluminum-cerium Alloys |
| Author(s) |
David J. Weiss, Orlando Rios, Justen Schaefer, Jessica Orr, Hunter Henderson, Zachary Sims, Scott McCall, Ryan Ott |
| On-Site Speaker (Planned) |
David J. Weiss |
| Abstract Scope |
Aluminum alloys are ubiquitous in light-weighting applications due to an excellent combination of high specific-strength and corrosion resistance, but often face challenges at the highest performance levels, where more costly and denser materials are needed, such as Ti-alloys. Here we discuss fabrication of highly stable, intrinsically nanocrystalline Al-based powders that provide exceptional precipitate strengthening via powder production and subsequent fabrication of these powders using laser powder bed fusion and powder consolidation techniques. Additive manufacturing synthesis routes permit the production of structures otherwise impossible through conventional bulk processing routes. Al-Ce alloys exhibit an excellent combination of thermal stability, and high-temperature strength. These alloys contain a high-volume fraction of Al11Ce3 intermetallic (>20 vol%) that resists coarsening at high-temperature due to the near zero (<10-4%) solubility of Ce in solid Al. This extreme thermal stability enabled us to set up the nanostructure during gas atomization and preserve it during solidification. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |