The Studies of Irradiation Hardening of Stainless Steel Reactor Internals under Proton and Xenon Irradiation

Nuclear Engineering and Technology

关键词: Hardness;    Irradiation;    Nix-Gao Model;    Stainless Steel;   

DOI  :  10.1016/j.net.2016.01.007

来源: DOAJ

【 摘 要 】

Specimens of stainless steel reactor internals were irradiated with 240 keV protons and 6 MeV Xe ions at room temperature. Nanoindentation constant stiffness measurement tests were carried out to study the hardness variations. An irradiation hardening effect was observed in proton- and Xe-irradiated specimens and more irradiation damage causes a larger hardness increment. The Nix-Gao model was used to extract the bulk-equivalent hardness of irradiation-damaged region and critical indentation depth. A different hardening level under H and Xe irradiation was obtained and the discrepancies of displacement damage rate and ion species may be the probable reasons. It was observed that the hardness of Xe-irradiated specimens saturate at about 2 displacement/atom (dpa), whereas in the case of proton irradiation, the saturation hardness may be more than 7 dpa. This discrepancy may be due to the different damage distributions.

【 授权许可】

Unknown