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Fatigue Crack Initiation and Propagation in Coated and Uncoated Inconel 713LC at 800 °C
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SYSNO ASEP 0354549 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Fatigue Crack Initiation and Propagation in Coated and Uncoated Inconel 713LC at 800 °C Author(s) Smékalová, J. (CZ)
Pospíšilová, S. (CZ)
Obrtlík, Karel (UFM-A) RID, ORCID
Juliš, M. (CZ)
Podrábský, T. (CZ)Number of authors 5 Source Title Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava, Řada strojní - ISSN 1210-0471
Roč. 56, č. 1 (2010), s. 155-162Number of pages 8 s. Language eng - English Country CZ - Czech Republic Keywords Fatigue ; crack propagation ; high temperature Subject RIV JL - Materials Fatigue, Friction Mechanics CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation Fatigue crack initiation and propagation was studied in cast polycrystalline nickel base superalloy Inconel 713LC in as-received condition and with surface treatment by AlSi protective coating. Cylindrical specimens were cyclically strained under strain control with constant total strain amplitude at 800 ˚C. Fatigue fracture surface, specimen surface, and specimen sections were investigated using optical microscopy and scanning electron microscopy. Fatigue crack initiation sites and fatigue crack growth mechanisms were identified and crack propagation rates were obtained base on striation spacing in fracture surfaces. The crack initiation mechanism study revealed reasons for the fatigue life increase in the surface treated material. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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