About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Corrosion Behavior in Advanced Nuclear Reactor Environments III
|
| Presentation Title |
Thermomechanical, lead corrosion and thermal stability assessment of innovative Alumina Forming Austenitic Alloys for LFRs |
| Author(s) |
Mauro Brignone, Daniele De Caro, Marco Poletti |
| On-Site Speaker (Planned) |
Mauro Brignone |
| Abstract Scope |
The development of new generation Lead-cooled Fast Reactors (LFRs) encounters the key challenge of long-term degradation of structural materials when exposed to liquid lead. Current research identifies alumina-forming austenitic (AFA) steels as a promising material class for structural applications in LFRs. A novel AFA steel composition has been developed and optimized to match challenging requirements of nuclear-grade materials. The experimental activity was carried out by casting 80 kg ingot through VIM and VAR processes. Thermomechanical tests were conducted using a Gleeble machine to identify optimum forming parameters afterwards used for the hot rolling of larger sheets. The material corrosion resistance was assessed through Pb corrosion tests for 1000 hours at 600°C. Additionally, mechanical tests both in air and in lead were executed to evaluate the corrosion and stress combination effect. Comprehensive bulk characterization techniques, including SEM, XRD, and OM, have been utilized to analyze microstructure, phase transformations and rupture mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Mechanical Properties |