| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Additive Manufacturing via Directed Energy Deposition of WTaCrV and WTaHfCrV Refractory High Entropy Alloys for Plasma Facing Components |
| Author(s) |
Caleb Hatler, Matthew Vigil, Bochuan Sun, Enrique Martinez, Saryu Fensin, Osman El-Atwani, Dan J. Thoma |
| On-Site Speaker (Planned) |
Caleb Hatler |
| Abstract Scope |
To meet the need for future fusion powerplants, materials capable of handling fusion-relevant extreme environments need to be developed. Refractory high entropy alloys are one potential material and show improved properties in irradiation resistance, hardness, and ductility compared to tungsten. Following thin film experiments showing high irradiation resistance of WTaCrV RHEA, arc-casting and additive manufacturing (AM) of bulk samples of WTaCrV and WTaHfCrV RHEAs were synthesized for characterization and irradiation testing. AM, particularly directed energy deposition, enabled compositionally unique high-throughput capability with elements typically volatilized at refractory metal melting temperatures. 25 1 cm3 samples were synthesized on a single build plate for each system. Arc-cast samples provided initial validation of structure and hardness and AM samples were analyzed for structure, hardness, density, and tensile strength. Detailed morphology characterizations revealed samples were fully mixed and achieved 50%-70% higher hardness than tungsten. Future work will investigate high-throughput irradiation resistance and dislocation movement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Nuclear Materials |