Characterization of Nickel-Doped Ferritic Steels for Helium Production Through HFIR Irradiation

摘要

Small heats of ferritic (martensitic) steels based on 12% Cr-1% Mo and 9% Cr-1% Mo were prepared containing about 0, 1, and 2% Ni. Additional heats were made with 2% Ni, in which the content of the ferrite-forming elements was adjusted to restore the net chromium equivalent to a value near that of the unmodified alloy. During irradiation in the High Flux Isotope Reactor (HFIR), transmutation of the exp 58 Ni in the 2% Ni alloys will give helium concentrations approximating those produced in such steels (without nickel) in fusion reactor service. Because the addition of nickel can affect the response to heat treatment, the microstructures of the alloys are being characterized. (ERA citation 08:011474)