| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Hafnium-Based Refractory High Entropy Alloy Structures Produced Via Additive Manufacturing for Extreme Temperature Applications |
| Author(s) |
Thomas A. Berfield, Justin Gillham, Suyash Niraula, Brendon Dodge |
| On-Site Speaker (Planned) |
Thomas A. Berfield |
| Abstract Scope |
This work presents the alloy composition screening and powder atomization of hafnium-based refractory high entropy alloys. Several atomic ratio variations of HfNbTaZr alloys were experimentally produced in additive manufacturing-compatible powder form through an ultrasonic plasma atomization process. Select cuts (< 45 microns average diameter) of the produced powders were used for deposition via laser powder bed fusion, while larger particulate powder sizes (>100 microns) were used for directed energy deposition processes. Samples produced via each additive manufacturing (AM) process were tested for room temperature ductility performance and microstructure features were characterized through electron microscopy. Finally, residual stress measurement tests were carried out to evaluate viability of both AM processes for translation to large-scale structure formation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Powder Materials |