| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments
|
| Presentation Title |
Extreme Hardness at High Temperature with a Lightweight Additively Manufactured Multi-principal Element Alloy |
| Author(s) |
Andrew Kustas, Morgan Jones, Frank DelRio, Ping Lu, Jonathan Pegues, Prashant Singh, Andrey Smirnov, Jordan Tiarks, Eric Hintsala, Douglas Stauffer, Jessica Roman-Kustas, Michael Abere, Emma White, Duane Johnson, Iver Anderson, Nicolas Argibay |
| On-Site Speaker (Planned) |
Andrew Kustas |
| Abstract Scope |
Higher melting temperature alloys can greatly increase the efficiency of turbomachinery used in grid electricity production worldwide. Existing superalloys used in components like turbine blades, bearings, and seals, remain a performance limiting factor due to their propensity for softening at temperatures often well above half their melting point. To address this critical materials challenge, we present results from integrating additive manufacturing and alloy design to guide significant improvements in material performance. We present an example of a multi-principal element alloy (MPEA) consisting of four distinct phases that exhibits high hardness and specific strength with negligible softening up to 800°C, surpassing other known alloys. Density functional theory calculations reveal a thermodynamic explanation for the observed temperature-independent hardness and favorability for the formation of this multiplicity of phases. Implications for next-generation energy systems is discussed.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, High-Entropy Alloys |