| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid-state Processing and Manufacturing for Extreme Environment Applications: Integrating Insights and Innovations
|
| Presentation Title |
Additive Friction Stir Deposition of a Tantalum-Tungsten Refractory Alloy |
| Author(s) |
Robert Griffiths, Alex Wilson-Heid, Marissa Linne, Eleanna Garza, Aiden Martin, Arnold Wright |
| On-Site Speaker (Planned) |
Robert Griffiths |
| Abstract Scope |
Additive friction stir deposition (AFSD) is a solid-state additive manufacturing (AM) technique, which functionalizes and accumulates discrete volumes of metal materials via frictional heating and deformation. The lack of material melting during AFSD typically results in wrought like, dense microstructures with considerably reduced thermal gradients applied across a deposition or built part. This lower processing temperature is particularly attractive when considering ultra-high temperature refractory alloys, where gradients during melt-based processing can exceed 3000oC. Despite the potential, the high strength performance of these refractory alloys poses significant challenges to integration with AFSD. Here we investigate the capabilities of ultra-high temperature AFSD utilizing a tantalum-tungsten alloy. The use of a twin-rod style AFSD approach provides significant heating capability, enabling preliminary depositions of the Ta-W alloys. The deposited material has a wrought like microstructure and tensile properties. Challenges during ultra-high temperature AFSD are described, and key process modifications for improved performance are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Shaping and Forming |