| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Investigation Of Microstructure and Mechanical Properties in Cost-Effective Thermomechanically Processed Nanostructured Ferritic Alloys |
| Author(s) |
Yan-Ru Lin, Yajie Zhao, Yi-Feng Su, Thak Sang Byun |
| On-Site Speaker (Planned) |
Yan-Ru Lin |
| Abstract Scope |
Nanostructured ferritic alloys (NFAs), like oxide-dispersion strengthened (ODS) alloys, are key to advancing nuclear reactors by improving material properties through nanoparticle integration. However, the high cost of mass-producing NFAs via mechanical milling is a significant barrier. This study investigates the microstructure and mechanical properties of three NFAs fabricated via a cost-effective method employing severe plastic deformation routes, specifically continuous thermomechanical processing (CTMP). SEM-EBSD analysis revealed nano-grain structures, while STEM-EDS quantified the size and density of the nanoparticles. Atom probe tomography (APT) confirmed the absence of finer oxide particles and detailed their chemical composition, indicating potential nitride dispersion strengthening. Mechanical testing showed that CTMP NFAs exhibit strength and ductility comparable to mechanically milled ODS alloys. CTMP NFAs show promise due to their cost-effectiveness, scalability, and potential radiation resistance. Further enhancements in achieving uniform nanoparticle distribution and increasing sink strength are recommended to mitigate cavity swelling, advancing their suitability for nuclear applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Characterization |