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Fracture behaviour of the 14Cr ODS steel exposed to helium and liquid lead
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SYSNO ASEP 0480409 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fracture behaviour of the 14Cr ODS steel exposed to helium and liquid lead Author(s) Hojná, A. (CZ)
Di Gabriele, F. (CZ)
Hadraba, Hynek (UFM-A) RID, ORCID
Husák, Roman (UFM-A)
Kuběna, Ivo (UFM-A) RID, ORCID
Rozumová, L. (CZ)
Bublíková, P. (CZ)
Kalivodová, J. (CZ)
Matějíček, Jiří (UFP-V) RID, ORCIDNumber of authors 9 Source Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 490, JUL (2017), s. 143-154Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords Impact fracture ; Microanalysis ; Nanostructured steel ; Oxidation ; Thermal ageing Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Plasma Physics - Metallurgy R&D Projects GA14-25246S GA ČR - Czech Science Foundation (CSF) GA14-12837S GA ČR - Czech Science Foundation (CSF) LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 ; UFP-V - RVO:61389021 UT WOS 000403132300017 EID SCOPUS 85018463374 DOI https://doi.org/10.1016/j.jnucmat.2017.03.049 Annotation This work describes the fracture behaviour of the 14Cr ODS steel produced by mechanical alloying process, after high temperature exposures. Small specimens were exposed to helium gas in a furnace at 720 degrees C for 500 h. Another set of specimens was exposed to flowing liquid lead in the COLONRI II loop at 650 degrees C for 1000 h. All specimens were tested for the impact and tensile behaviour. The impact test results are compared to other sets of specimens in the as received state and after isothermal annealing at 650 degrees C for 1000 h. The impact curves of the exposed materials showed positive shifts on the transition temperature. While the upper shelf value did not change in the Pb exposed ODS steel, it significantly increased in the He exposed one. The differences are discussed in terms of surface and subsurface microscopy observation. The embrittlement can be explained as the effect of a slight change in the grain boundary and size distribution combined with the depletion of sub-surface region from alloying elements forming oxide scale on the surface. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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