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Initiation and propagation of fatigue cracks in cast IN713LC superalloy
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SYSNO ASEP 0353457 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Initiation and propagation of fatigue cracks in cast IN713LC superalloy Author(s) Kunz, Ludvík (UFM-A) RID, ORCID
Lukáš, Petr (UFM-A)
Konečná, R. (SK)Source Title Engineering Fracture Mechanics. - : Elsevier - ISSN 0013-7944
Roč. 77, č. 11 (2010), s. 2008-2015Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords IN 713LC ; high temperature fatigue ; crystallographic fatigue crack initiation ; mean stress effect Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects FT-TA4/023 GA MPO - Ministry of Industry and Trade (MPO) 1QS200410502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000280285800034 DOI 10.1016/j.engfracmech.2010.02.002 Annotation Fatigue life, initiation and propagation of cracks at 800 °C in a cast Ni-base superalloy IN 713LC were experimentally studied in high-cycle fatigue region. Load symmetrical cycling and cycling with high tensile mean load were applied. Both crystallographic crack initiation resulting in long Stage I crack growth and non-crystallographic Stage II propagation were observed. High scatter of fatigue life data was explained by (i) variability in microstructural conditions for crystallographic crack initiation and propagation and by (ii) influence of casting defect size distribution. The fractographic observation supports the slip band decohesion mechanism of crack initiation and an important role of cyclic slip localization in persistent slip bands. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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