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Nanostructure evolution in ODS steels under ion irradiation

Rogozhkin, S.; Bogachev, A.; Korchuganova, O.; Nikitin, A.; Orlov, N.; Aleev, A.; Zaluzhnyi, A.; Kozodaev, M.; Kulevoy, T.; Chalykh, B.; Lindau, R. 1; Hoffmann, J. 1; Möslang, A. 1; Vladimirov, P. 1; Klimenkov, M. 1; Heilmaier, M. 1; Wagner, J. 1; Seils, S. 1
1 Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Excellent mechanical properties of ODS steels are directly related to the high density of homogeneously distributed, well-formed oxide particles (such as Y2O3, or Y-Ti-O). However, atom probe tomography study of ODS steels revealed that in addition they contain almost a hundred times more nanoclusters enriched in Y, O and V/Ti (if present in the alloy composition) than larger oxide particles.

In this work, we carried out atom probe tomography (APT) and transmission electron microscopy (TEM) studies of three different ODS steels produced by mechanical alloying: ODS Eurofer, 13.5Cr ODS and 13.5Cr-0.3Ti ODS. These materials were investigated after irradiation with Fe (5.6 MeV) or Ti (4.8 MeV) ions up to 1015 ion/cm2 and part of them up to 3 × 1015 ion/cm2. In all cases, areas for TEM investigation were cut at a depth of ∼ 1.3 µm from the irradiated surface corresponding to the peak of the radiation damage dose. It was shown that after irradiation at RT and at 300 °С the number density of oxide particles in all the samples grew up. Meanwhile, the fraction of small particles in the size distribution has increased. APT revealed an essential increase in nanoclusters number and a change of their chemical composition at the same depth. ... mehr

DOI: 10.1016/j.nme.2016.06.011
Zitationen: 52
Zitationen: 50
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Karlsruhe Nano Micro Facility (KNMF)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2016
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000058691
HGF-Programm 31.03.09 (POF III, LK 01) Strukturmaterial f. Blanket und Divertor
Erschienen in Nuclear materials and energy
Verlag Elsevier
Band 9
Seiten 66-74
Vorab online veröffentlicht am 06.07.2016
Schlagwörter Transmission electron microscopy (TEM); Atom probe tomography (APT); Oxide dispersion strengthened steel; Oxide particle; Cluster; Heavy ion irradiation
Nachgewiesen in Dimensions
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