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Isothermal fatigue behavior of cast superalloy Inconel 792-5A at 23 and 900 °C
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SYSNO ASEP 0332320 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Isothermal fatigue behavior of cast superalloy Inconel 792-5A at 23 and 900 °C Author(s) Obrtlík, Karel (UFM-A) RID, ORCID
Petrenec, Martin (UFM-A)
Man, Jiří (UFM-A) RID, ORCID
Polák, Jaroslav (UFM-A) RID, ORCID
Hrbáček, K. (CZ)Number of authors 5 Source Title Journal of Materials Science. - : Springer - ISSN 0022-2461
Roč. 44, č. 12 (2009), s. 3305-3314Number of pages 10 s. Language eng - English Country US - United States Keywords Low cycle fatigue ; High temperature ; Inconel 792-5A Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects 1QS200410502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) FI-IM/025 GA MPO - Ministry of Industry and Trade (MPO) GA106/07/1507 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000266039000039 DOI 10.1007/s10853-009-3446-3 Annotation Total strain-controlled tests have been performed on cylindrical specimens of polycrystalline Inconel 792-5A at 23 and 900 C to study the effect of temperature on low cycle fatigue characteristics and cyclic strain localization. Hardening/softening curves,cyclic stress–strain curves,and fatigue life curves are presented. Two linear dependencies are used to approximate the room temperature data in Manson–Coffin plot. Technique of oriented foils observed in transmission electron microscope is used to study dislocation structure. Effect of temperature on surface relief topography and fracture surface is documented using scanning electron microscopy and atomic force microscopy. High-amplitude straining is characterized by slight initial hardening followed by saturation at room temperature and sustained weak softening at 900 C. Low-amplitude cycling results in the stable stress response.Plastic strain localization into persistent slip bands lying along {111}slip planes was observed at both temperatures. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2010
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