About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Characterization and properties of L-DED refractory multi-principal elemental alloys |
| Author(s) |
Erin Barrick, Paul Specht, Daniel Leseberg, Levi Van Bastian, Andrew Kustas |
| On-Site Speaker (Planned) |
Erin Barrick |
| Abstract Scope |
Refractory multi-principal elemental alloys (RMPEAs) are emerging materials that have attracted attention for exceptional properties, such as high melting temperatures, retention of high-strength at elevated temperature, resistance to degradation, etc. Blown powder laser beam directed energy deposition (L-DED) was used to fabricate coupons of MoNbTaTi and similar RMPEAs using elemental powder feedstock. Solid state grain boundary cracking was observed and characterized using scanning transmission electron microscopy (S/TEM) to understand the cracking mechanism(s). Composition modifications and processing strategies were designed to alleviate cracking during printing. Mechanical behavior was assessed through tensile testing, hardness testing, and dynamic high-pressure experiments. The techniques developed in this work can be adapted to other RMPEAs and refractory alloys to enable successful printing with elemental powders and have important implications for full-scale adaptation of these alloys with regards to compositional control and impurity element concentrations.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, |