| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Laser Beam Directed Energy Deposition Process Optimization for Refractory High Entropy Alloys |
| Author(s) |
Erin Barrick, Raymond Puckett, Shaun Whetten, Jonathan Pegues, Michael Melia, Remi Dingreville, Sal Rodriguez, Andrew Kustas |
| On-Site Speaker (Planned) |
Erin Barrick |
| Abstract Scope |
Refractory high entropy alloys (RHEAs) are emerging materials that have attracted attention for exceptional properties, such as high melting temperatures, retention of high-strength at elevated temperature, and resistance to degradation in harsh environments. Recently, additive manufacturing (AM) has been used to rapidly screen novel RHEA compositions for fabricability, microstructure, and properties. Comparatively less attention has been devoted to optimizing printing process parameters to produce defect-free parts. In this study, laser beam directed energy deposition was used to fabricate compact metallurgical specimens using various processing parameters (e.g., laser power, scan velocity) for alloys containing Mo, Nb, Ta, Ti, V, and W constituents. Microstructural characterization was accomplished using scanning electron microscopy, including electron backscattered diffraction, to understand the effects of processing variables on defect formation. The resulting printing strategies can be adapted to other alloys containing high melting temperature constituents. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Additive Manufacturing |