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Fatigue life and fracture of cast gamma TiAl intermetallic alloy at room and elevated temperatures
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SYSNO ASEP 0439947 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Fatigue life and fracture of cast gamma TiAl intermetallic alloy at room and elevated temperatures Author(s) Petrenec, Martin (UFM-A)
Šmíd, Miroslav (UFM-A) RID, ORCID
Polák, Jaroslav (UFM-A) RID, ORCIDNumber of authors 3 Source Title METAL 2011 Conference Proceedings - Papers. - Ostrava : Tanger s.r.o., 2011 - ISBN 978-80-87294-24-6 Pages s. 969-974 Number of pages 6 s. Publication form Medium - C Action METAL 2011 /20./ Event date 18.05.2011-20.05.2011 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords low cycle fatigue ; cast gamma TiAl alloy ; fracture surfaces ; PSMs ; elevated temperature Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GAP107/11/0704 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000302746700156 Annotation The low-cycle fatigue properties, surface relief and fracture surfaces of cast TiAl alloys with 2 at.% Nb having nearly lamellar microstructure were studied at room temperature and at 750 degrees C. Cyclic stress-strain curves (CSSC) and fatigue life curves were obtained at both temperatures. The surface relief and the fracture surfaces of fractured specimens were observed using scanning electron microscopy. At room temperature, significant cyclic hardening is observed whereas at 750 degrees C cyclic response was stable. Parameters of the CSSC, the Manson-Coffin law and the Basquin law were determined. Persistent slip markings formed along interlamellar interfaces were predominant locations for fatigue cracks at both temperatures. The cracks initiated at surface or in sub-surface region led to the formation of smooth flat areas on the fracture surface corresponding to the persistent slip bands. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015
Number of the records: 1