| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications II
|
| Presentation Title |
Is there Residual Stress in Tungsten Fiber Reinforced Tungsten Composites |
| Author(s) |
Hanns Gietl, Johann Riesch, T. Höschen, S. Schönen, Ch. Le Bourlot, J-Y. Buffière, Wolfgang Pantleon, J.W. Coenen |
| On-Site Speaker (Planned) |
Hanns Gietl |
| Abstract Scope |
The development of materials for plasma facing components is a key challenge on the path to a fusion power plant. Tungsten fiber reinforced tungsten (Wf/W) can overcome the inherent brittleness of tungsten and its embrittlement during operation which are limiting factors for its use.
Residual stress is known to have a strong impact on the materials properties of composite materials. For Wf/W it was seen that residual stress is present during push-out and pull-out tests in the single-fiber composites consisting of a drawn W-fiber, an interlayer material like Y2O3 and a CVD tungsten matrix. Residual stress caused by thermal mismatch should be minimal, but the fibers are under tension during matrix deposition. Although residual stress was also confirmed by finite element modelling the absolute amount was still unknown. The objective of this study is to determine the residual stress in Wf/W by means of synchrotron X-Ray transmission diffraction measurements. |
| Proceedings Inclusion? |
Planned: |