| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Accelerated Development of Tungsten Alloy Plasma Facing Materials |
| Author(s) |
Hyeji Im, Jason Trelewicz, Ian Mccue |
| On-Site Speaker (Planned) |
Ian Mccue |
| Abstract Scope |
Tungsten is the leading plasma facing material (PFM) candidate for fusion reactors due to its attractive thermo-physical properties, resistance to sputtering, and chemical compatibility with tritium. As a PFM, tungsten will need to be fabricated into functional components with intricate geometric features, but the limited ductility of tungsten at room temperature makes it challenging to forge and machine parts more complex than sheets and rods. Laser-based additive manufacturing (AM) techniques are an attractive to reliably fabricate complex geometries without expensive tooling. However, it is challenging to fabricate crack-free AM tungsten due to high cooling rates and its low fracture toughness. In this talk, we will present a CALPHAD-based alloy design strategy to fabricate AM tungsten materials with little-to-no cracks and assess its fracture properties via four-point bend tests. We will compare these results with pure AM W and discuss the relationship of these properties with microstructural features and processing-related defects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, |