Characterisation of ODS Fe-14Cr-2W-0.3Ti before and after high temperature triple and low temperature single ion irradiations

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2017.12.025· OSTI ID:22804898

Leguey, T. ^[1]; Auger, M. A.; Lozano-Perez, S.; Armstrong, D. E.J. ^[2]; Garcia-Cortes, I. ^[3]; Castro, V. de ^[1]

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1. Departamento de Física, Universidad Carlos III de Madrid, 28911 Leganés (Spain)
2. Department of Materials, University of Oxford, OX1 3PH Oxford (United Kingdom)
3. Laboratorio Nacional de Fusión, CIEMAT, Avda. de la Complutense 40, 28040 Madrid (Spain)

Highlights: • Nanoparticles stable after high temperature triple-beam and low temperature single-beam irradiation • Samples appear to have maintained the composition after both irradiations. • Slight decrease of the nanoparticle sizes below 5 nm after both irradiations • There appears to be incomplete dissolution of smaller nanoparticles after both irradiations. - Abstract: Oxide dispersion strengthened reduced activation ferritic steels are being considered as structural materials for future fusion reactors and Gen IV fission reactors. In this work, the stability of the nanometric oxides after being irradiated at different conditions and temperatures has been investigated. A Fe-14Cr-2W-0.3Ti-0.3Y{sub 2}O{sub 3} alloy was simultaneously triple-beam irradiated at 600 °C with Fe, He and H ions. The same alloy was irradiated with Fe ions at − 80 °C. The microstructure of this alloy was investigated using Transmission Electron Microscopy, Atom Probe Tomography and nanoindentation before and after the irradiations. There were no significant changes in the morphology and chemical composition of the nanoparticles after the irradiations, although the size of the smaller ones tends to decrease for both irradiation conditions. Small irradiation-induced bubbles were present after the triple simultaneous irradiation at high temperature. Nanoindentation also shows no significant differences with a slight increase in hardness for the sample irradiated at low temperature, while softening appears in the high temperature irradiation.

• OSTI ID: 22804898
• Journal Information: Materials Characterization, Vol. 136; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM COMPOUNDS
DISPERSIONS
DISSOLUTION
FERRITIC STEELS
HARDNESS
HELIUM IONS
HYDROGEN IONS
ION BEAMS
IRON COMPOUNDS
IRON IONS
IRRADIATION
MICROSTRUCTURE
NANOPARTICLES
NANOSTRUCTURES
PHYSICAL RADIATION EFFECTS
THERMONUCLEAR REACTORS
TITANIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN COMPOUNDS
YTTRIUM OXIDES