About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
The Ion Irradiation Response and Precipitate Stability of V-4Cr-4Ti Alloys for Fusion Structural Applications |
| Author(s) |
Ashley N. Lee, Ying Yang, Yajie Zhao, Yan-Ru Lin, David Sprouster, Lance Snead, Steven Zinkle |
| On-Site Speaker (Planned) |
Ashley N. Lee |
| Abstract Scope |
A primary challenge in realizing fusion energy systems is the development of structural materials capable of withstanding extreme environments such as high temperature, irradiation, and mechanical loading. Vanadium-based alloys are promising due to their low neutron activation, good thermal conductivity, and high-temperature strength. This work focuses on ion irradiation of the novel precipitate-strengthened V-4Cr-4Ti-0.1C (V44C) alloy system, with emphasis on the thermal and radiation stability of titanium-rich carbide precipitates. Heavy ion irradiations (9 MeV) were performed to a midrange dose of 3 dpa at 1×10⁻³ and 5×10⁻⁵ dpa/s at 400, 550, and 700 °C, as well as higher-dose irradiations (30 dpa) at 1×10⁻³ dpa/s at the same temperatures. Post-irradiation characterization includes nanoindentation, synchrotron glancing-incidence X-ray diffraction, transmission electron microscopy, and atom probe tomography. These results will be used to assess precipitate stability and mechanical property evolution, supporting the development of radiation-tolerant vanadium alloys for fusion structural applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, |