| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Effects Of Ion Irradiation on Microstructure and Micromechanical Properties of a Ductile-Phase-Toughened Tungsten Heavy Alloy |
| Author(s) |
Ana Garcia Caraveo, Spencer Doran, James V. Haag IV, Weilin Jiang, Zhihan Hu, Lin Shao, Tianyi Chen, Wahyu Setyawan |
| On-Site Speaker (Planned) |
Ana Garcia Caraveo |
| Abstract Scope |
Ductile phase toughened (DPT) W-Ni-Fe alloys enhance fracture toughness
compared to pure tungsten, addressing brittleness of W-based plasma-facing materials. Under Ni+ and He+ irradiation simulating the damage experienced in
conceptual fusion power reactors, the material showed cavities in both phases and along the W/NiFeW interface, raising concerns regarding the potential mechanical degradation and impairment of the ductile-phase toughening mechanisms.
In this study, we performed nanomechanical characterization of both tungsten and ductile phases and their interface before and after irradiation, focusing on the changes of phase-specific hardness and fracture toughness as well as dislocation transmission across the interface. With the support of transmission electron microscopy (TEM), the defects developed by different irradiation conditions are linked to the observed mechanical degradation. Knowledge about irradiation – microstructure – mechanical property relationship at the microstructural level will benefit performance prediction and future materials development/optimization efforts in the fusion applications of DPT tungsten alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Mechanical Properties |