| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Synergistic Irradiation, Corrosion, and Microstructural Evolution in Nuclear Materials
|
| Presentation Title |
Effect of Phosphorus (P) on Precipitation and Segregation Behavior in Neutron Irradiated Reactor Pressure Vessel Steels |
| Author(s) |
Mukesh Bachhav, Emmanuelle Marquis, Anshul Kamboj, Megha Dubey, G. Robert Odette |
| On-Site Speaker (Planned) |
Mukesh Bachhav |
| Abstract Scope |
RPV steels undergo embrittlement which may limit pressure vessel lifetimes. In low Cu steels embrittlement is linked to the formation and growth of nanoscale Mn-Ni-Si (MNS) precipitates with increasing fluence. The effects of Cu, Ni. Mn and Si concentration on the MNS precipitation is well studied and models are available to predict the corresponding embrittlement over extended plant lifetimes. However, there is very limited understanding on the effect of P on the MNS precipitation. In this work, we studied the individual and synergic effect of P, Cu and Ni on the MNS precipitation. Seven RPV steels with systematic variations in Cu, Ni, and P contents were neutron irradiated to a fluence of 1.4 x 10^20 n/cm2 at 290°C in the UCSB ATR-2 experiment. Atom probe tomography (APT) revealed the role of P in the nucleation of MNS precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Other |