| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Systems for the Future of Fusion Energy
|
| Presentation Title |
Effect of He Plasma Exposure on Recrystallization and Properties of W |
| Author(s) |
Dhriti Bhattacharyya, Calvin Hoang, Matthew Thompson, Cormac Corr |
| On-Site Speaker (Planned) |
Dhriti Bhattacharyya |
| Abstract Scope |
Tungsten is the primary material used in the manufacture of plasma facing diverter components of Tokamak fusion reactors. It is known that exposure to He ash from the plasma can cause surface changes in the tungsten, causing degradation of its morphology and properties. The diffusion of He also causes changes in the recrystallization characteristics of W, thus affecting its properties in the long run as well. In this study, W samples have been exposed to He through the experimental plasma device called Magpie, and its effect on recrystallization has been studied through subsequent annealing. The exposed and annealed samples were characterized by scanning and transmission electron microscopy, electron backscatter diffraction and nanoindentation. It is apparent from these studies that exposure to He at higher temperatures (above 300°C) causes a delay in recrystallization, as evident from the higher annealing temperatures required for a drop in hardness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Characterization |