Author： Miller M. K. Russell K. F. Sokolov M. A. Nanstad R. K.
Publisher： Taylor & Francis Ltd
ISSN： 1478-6443
Source： Philosophical Magazine, Vol.85, Iss.4-7, 2005-02, pp. : 401-408
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
An atom probe tomography characterization has been performed on a neutron-irradiated (fluence = 0.8 × 10 19 n cm −2 (E > 1 MeV)) high copper (0.37%), high manganese (1.64%), high nickel (1.23%) and high chromium (0.47%) KS-01 test weld. This weld exhibited a high sensitivity to neutron irradiation. Atom probe tomography revealed that there was an unusually high supersaturation of copper in the matrix after the stress relief treatment, which resulted in a high number density (3 × 10 24 m −3 ) of Cu-Mn-Ni-enriched precipitates after neutron irradiation. Their average size and composition were estimated to be 〈 l g〉 = 2.6 ± 0.5 nm and Fe-17.0 ± 9.7 at% Cu, 31.9 ± 13.8% Ni, 31.7 ± 11.8% Mn. Phosphorus clusters and a Cr-, Mn-, Ni-, Cu-, C-, N-, Si- and Mo-enriched atmosphere, possibly associated with a dislocation, were also observed in the neutron irradiated material. Nickel, manganese, silicon, phosphorus and carbon segregation to a grain boundary were observed in the unirradiated condition. The microstructural and mechanical response to irradiation was consistent with other lower solute level steels.
Related content
Access to resources
Recommend
