Atom-probe tomography was used to investigate the segregation of solutes to dislocations in the martensitic/ferritic oxide-dispersion-strengthened Eurofer steel. The material was irradiated with 0.5–2MeV Fe2+ ions at 400C, and the distributions of solutes at dislocations were analysed in the ‘as-received’ condition, after annealing, and after ion implantation. While Mn was randomly distributed in the as-received material, significant segregation of Mn at dislocations and grain boundaries was observed after irradiation. The level of Mn segregation varies depending on the density of oxide particles surrounding the dislocations.

Effects of Heavy-Ion Irradiation on Solute Segregation to Dislocations in Oxide-Dispersion-Strengthened Eurofer 97 Steel. C.A.Williams, J.M.Hyde, G.D.W.Smith, E.A.Marquis: Journal of Nuclear Materials, 2011, 412[1], 100-5