About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
Presentation Title |
Irradiation Effects on Mechanical Properties of PM-HIP Electron Beam Welded RPV Steels |
Author(s) |
Elliot H. Marrero, Grayson Nemets, Jasmyne Emerson, Maria Okuniewski, Janelle Wharry |
On-Site Speaker (Planned) |
Elliot H. Marrero |
Abstract Scope |
This talk will present the irradiation evolution of mechanical properties of electron beam (EB) welded reactor pressure vessel (RPV) steel fabricated by powder metallurgy with hot isostatic pressing (PM-HIP). PM-HIP with EB welding presents a promising opportunity to scalably manufacture RPVs at a fraction of the cost and time as conventional one-piece forging. However, irradiation embrittlement is a persistent concern in RPV steels. To this end, we conduct two 1.5 MeV proton irradiations to 0.25 displacement per atom (dpa) at 300℃ and 325℃ on a PM-HIP EB welded SA508 Grade 3 steel. Nanoindentation profiles reveal the effect of irradiation across the weld, heat affected zone (HAZ), and base metal. A combination of transmission electron microscopy (TEM) and atom probe tomography (APT) provide insight into the microstructural evolution, linking hardening to precipitation, void swelling, and dislocation loops. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Nuclear Materials |