FORMATION OF A SUBMICROCRYSTAL FCC STRUCTURE UNDER IRRADIATION WITH HIGH-ENERGY PARTICLES

Citation
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
Citations number
6
Categorie Soggetti
Material Science
Journal title
ISSN journal
09659773
Volume
9
Issue
1-8
Year of publication
1997
Pages
189 - 192
Database
ISI
SICI code
0965-9773(1997)9:1-8<189:FOASFS>2.0.ZU;2-L
Abstract
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.