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High temperature low cycle fatigue of superalloy Inconel 738LC
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SYSNO ASEP 0093510 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title High temperature low cycle fatigue of superalloy Inconel 738LC Title Vysokoteplotní nízkocyklová únava superslitiny Inconel 738LC Author(s) Obrtlík, Karel (UFM-A) RID, ORCID
Chlupová, Alice (UFM-A) RID, ORCID
Petrenec, Martin (UFM-A)
Polák, Jaroslav (UFM-A) RID, ORCIDSource Title Programme and The Book of Abstracts. - Belgrade : Institute of Technical Sciences of SASA, 2007 - ISBN 978-86-80321-11-0
S. 138-138Number of pages 1 s. Action Yugoslav Conference on Advanced Materials /2./ Event date 15.09.1997-19.09.1997 VEvent location Herceg Novi Country YU - YU Event type EUR Language eng - English Country CS - CS Keywords Low cycle fatigue ; Inconel 738LC ; strain localization ; fatigue life curve Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects 1QS200410502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA106/07/1507 GA ČR - Czech Science Foundation (CSF) GP106/05/P521 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation Cylindrical specimens of cast polycrystalline nickel base superalloy Inconel 738LC were cyclically strained under total strain control at 23, 500, 700 and 800 °C to fracture. Cyclic hardening/softening curves, cyclic stress-strain curves, and fatigue life curves were obtained at four temperatures. Surface relief was studied in specimens fatigued to failure using scanning electron microscopy. Cyclic hardening/softening behaviour depends both on temperature and strain amplitude. Low amplitude straining was characterised by saturation of the stress amplitude. In high amplitude straining a pronounced hardening was found which was followed by saturation at room temperature or tendency to it at 700 and by cyclic softening at 800 °C. The cyclic stress-strain curves can be fitted by power law. They are shifted to lower stresses with increasing temperature. Fatigue life curves can be approximated by the Manson-Coffin and Basquin laws. Slip markings were detected on specimen surface at all test temperatures. When temperature increases the density of slip markings decreases and the Manson-Coffin and Basquin curves are shifted to lower lives. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2008
Number of the records: 1