|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||N-34: Influence of the Bulk Chemical Composition on the Microstructure Evolution of Irradiated Chemically-tailored Nuclear RPV Steels
||Aidar Zakirov, Bertrand Radiguet, Rachid Chaouadi, Philippe Pareige
|On-Site Speaker (Planned)
Irradiation embrittlement of reactor pressure vessel (RPV) steel, partly due to the formation of solute clusters, is one of the main lifetime limitations of nuclear power plants. The bulk concentration of irradiation-sensitive elements such as Cu, P, Ni, Mn and Si impacts the mechanisms and kinetics of formation of these clusters.
To study the synergy between Cu and P, Ni and Mn, chemically-tailored steels with variable compositions were irradiated in BR2 reactor. The effect of irradiation on the mechanical properties was measured by tensile tests at room temperature.
Microstructural changes after irradiation were studied by Atom Probe Tomography. In this presentation, the evolution of microstructure due to neutron irradiation in RPV steels with different Cu, P, Ni, Mn contents will be reported and discussed, to understand the synergetic effects between these solutes and to improve the prediction of the post-irradiation behavior of RPV steels.
||Nuclear Materials, Mechanical Properties, Characterization