| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Microstructure Modification of Tungsten by Alloying, Dispersion Strengthening, and Thermomechanical Processing for Fusion Energy Applications |
| Author(s) |
Blake Kourosh Emad, Siva Shankar Alla, Carson Hester, Xiao-Ying Yu, Yutai Kato, Sundeep Mukherjee, Vijay Vasudevan |
| On-Site Speaker (Planned) |
Blake Kourosh Emad |
| Abstract Scope |
Tungsten and its alloys are prime candidates for plasma facing materials (PFM) in the first wall of fusion reactors due to their ability to withstand extreme conditions, such as high operating temperatures, high neutron flux, ion impact, and related sputtering events. However, tungsten's low ductility and high ductile-to-brittle transition temperature (DBTT), due to a non-planar screw dislocation core structure that increases slip resistance, together with weak grain boundary cohesion, present major challenges. In this study, we investigate a method for refining grains by alloying tungsten and incorporating dispersion strengthening additives via solid-state processing methods combining high energy ball milling with consolidation by spark plasma sintering and/or hot isostatic pressing followed by thermomechanical processing and subsequent heat treatment. The effects of alloying, dispersion strengthening, and processing on the microstructure and mechanical properties were investigated. The results and discussion will cover grain crushing, dislocation structure, recrystallization, and grain refinement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Powder Materials |