[2H17-22] RPV Cladding Tubes

[2H18] Evaluation of the relationship between microstructure and hardness in neutron irradiated reactor pressure vessel model alloys following thermal ageing

＊Liang Chen^1,2, Kenji Nishida², Kenta Murakami¹, Kenji Dohi², Li Liu¹, Naoto Sekimura¹ (1.Univ. Tokyo, 2.CRIEPI)

Keywords:Reactor pressure vessel, Embrittlement, Solute clusters, Atom probe tomography

The relationship between microstructures and mechanical properties is important issue for the embrittlement correlation method for Japanese reactor pressure vessel steels. In this work,the characteristics of solute clusters are studied by atom probe tomography in neutron irradiated model alloys following thermal ageing to peak hardness. Also, the relationship between solute clusters and Vickers hardness change is investigated.