| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Thermomechanical Processing of Tungsten and its Alloys for Fusion Energy Applications |
| Author(s) |
Siva Shankar Alla, Blake Emad, Carson Hester, Saumyadeep Jana, Xiao-Ying Yu, Yutai Kato, Vijay Vasudevan, Sundeep Mukherjee |
| On-Site Speaker (Planned) |
Sundeep Mukherjee |
| Abstract Scope |
Tungsten and its alloys are among the leading plasma-facing material (PFM) candidates for the first wall inside a fusion reactor. However, low ductility and high ductile-to-brittle transition temperature (DBTT) attributed to a non-planar screw dislocation core structure causing high resistance to slip and weak grain boundary cohesion are major impediments for the use of tungsten that need to be overcome. It is challenging to thermo-mechanically process tungsten and its alloys due to their poor formability. We report on systematic thermomechanical routes for crack-free processing of tungsten via integrated experimental and simulation studies. The effects of hot, cold, and low temperature rolling on the microstructure and mechanical properties were evaluated to obtain fundamental understanding of the brittle to ductile transition mechanisms in tungsten and its alloys. Results and discussions will be presented on grain smashing, dislocation structure, recrystallization, grain growth, and formation of ultrafine fibrous structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Characterization |