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Influence of microstructure on impact properties of 9–18%Cr ODS steels for fusion/fission applications
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SYSNO ASEP 0369893 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of microstructure on impact properties of 9–18%Cr ODS steels for fusion/fission applications Author(s) Hadraba, Hynek (UFM-A) RID, ORCID
Fournier, B. (FR)
Stratil, Luděk (UFM-A) ORCID
Malaplate, J. (FR)
Rouffié, A.-L. (FR)
Wident, P. (FR)
Ziolek, L. (FR)
Béchade, J.-L. (FR)Number of authors 8 Source Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 411, 1-3 (2011), s. 112-118Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords ODS steel ; extrusion shape ; crystallographic texture ; morphologic texture ; brittle fracture mechanisms Subject RIV JG - Metallurgy R&D Projects GA106/08/1397 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000290073400012 DOI 10.1016/j.jnucmat.2011.01.038 Annotation The paper describes the influence of the microstructure (coming from the extrusion shape, the chemical composition and the thermo-mechanical treatments) of (9–18%)Cr–W–Ti–Y2O3 ODS steels on their impact fracture properties. The extrusion shape plays a major role on the impact properties, materials extruded as a rod present a higher upper shelf energy (USE) and a lower ductile to brittle transition temperature (DBTT) compared to materials extruded as plates. The DBTT for the non-recrystallized 14%Cr ferritic steels was shifted towards higher temperatures compared to the 9%Cr tempered ferritic–martensitic steel. Increasing the W and Ti content in 9%Cr tempered ferritic–martensitic ODS steel leads to a USE and a DBTT shifted towards higher energies and higher temperatures respectively. Increasing the yttria content leads to a drop of the impact energy and a shift of the DBTT of ferritic ODS steel towards higher temperatures. The present study highlights extensive splitting of the fracture surfaces and a dependency of the impact energy on the fracture plane orientation according to the microstructure anisotropy. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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