Bn. Goshchitskii et al., FORMATION OF A SUBMICROCRYSTAL FCC STRUCTURE UNDER IRRADIATION WITH HIGH-ENERGY PARTICLES, Nanostructured materials, 9(1-8), 1997, pp. 189-192
The influence of a high-dose (up to 200 dpa) irradiation with 1.5 MeY
Kr+ ions at 500-700 degrees C on the formation of a submicrocrystal st
ructure of Cr-Ni stainless steels was analyzed. In Cr16Ni15Mo3 and Cr1
6Ni8Mo3 unaging steels dislocations rearrange themselves to subgrains
subject to the irradiation dose of 10 dpa at 600 degrees C, thus favor
ing formation of fine (30-50 nm) subgrains misoriented up to 1-3 degre
es. An increase in the irradiation dose up to 160 dpa leads to recryst
allization and appearance of fine misoriented crystals 50-100 nm in si
ze. If dislocations are pinned with dispersed Ni3Ti particles (Cr16Ni1
5Mo3Ti1 aging steels), the subgrains are formed only after the irradia
tion dose of 160-200 dpa Therefore the radiation method of producing n
anocrystals is comparable as to its efficiency with a strong deformati
on. (C) 1997 Acta Metallurgica Inc.