| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
Fatigue crack propagation in semi-brittle materials: A case study on tungsten |
| Author(s) |
Anton Hohenwarter, Michael Pegritz, Stefan Wurster, Reinhard Pippan |
| On-Site Speaker (Planned) |
Anton Hohenwarter |
| Abstract Scope |
The use of tungsten in structural applications is often limited by its characteristic brittle fracture behavior possessing a ductile to brittle transition well above room-temperature. An encouraging approach to mitigate the intrinsic brittleness has been demonstrated by cold working. Beside the quasi-static fracture behavior, also the understanding of fatigue crack propagation is of great technical significance, especially in applications where cyclic thermal stresses arise, such as in future fusion reactors. In this contribution the temperature dependent fracture and fatigue behavior of ITER grade tungsten up to 500°C in vacuum will be presented and the underlying structure-property relationships are elaborated. Special focus will be put on the intrinsic as well as extrinsic fatigue crack growth mechanisms depending on the testing temperature and its influence on threshold of stress intensity factor range and fatigue crack propagation rate. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, |