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IN-SITU HIGH TEMPERATURE LOW CYCLE FATIGUE STUDY OF SURFACE TOPOGRAPHY EVOLUTION IN NICKEL SUPERALLOY
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SYSNO ASEP 0484558 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title IN-SITU HIGH TEMPERATURE LOW CYCLE FATIGUE STUDY OF SURFACE TOPOGRAPHY EVOLUTION IN NICKEL SUPERALLOY Author(s) Petrenec, M. (CZ)
Polák, Jaroslav (UFM-A) RID, ORCID
Šamořil, T. (CZ)
Dluhoš, J. (CZ)
Obrtlík, Karel (UFM-A) RID, ORCIDNumber of authors 5 Source Title METAL 2014: 23RD INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS. - Ostrava : Tanger Ltd, 2014 - ISBN 978-80-87294-54-3 Pages s. 1139-1144 Number of pages 6 s. Publication form Print - P Action METAL 2014 - International Conference on Metallurgy and Materials /23./ Event date 21.05.2014 - 23.05.2014 VEvent location Brno Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords In-situ ; SEM ; high temperature ; fatigue ; superalloy Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Audio engineering, reliability analysis R&D Projects ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000350641700188 EID SCOPUS 84925013959 Annotation In-situ Low Cycle Fatigue test (LCF) at temperature 635 degrees C have been performed in Scanning Electron Microscope (SEM) equipped with Electron Backscatter Diffraction analysis (EBSD) on a small dog-bone-shaped specimen of cast Inconel 713LC superalloy. The aim of the work was to study early stage fatigue damage at high temperature by the observations of the characteristic surface relief evolution and crystallographic characterization changes by EBSD. The detail of slip bands shape was checked by FIB and AFM microscopes. The LCF test was conducted on GATAN stage with pre tilted position and constant stress amplitude of total cycle number of 20. The relief produced in the first cycle determines the other locations of the localized cyclic slip to the primary slip planes (111). The relief was modified in the next cycles but without forming additionally new slip traces in the primary system. Based on EBSD analysis before and after LCF, the orientation of two grains was changed which caused activation of second slip system. The damage mechanism evolution is closely connected with the cyclic strain localization to the persistent slip bands where the fatigue cracks were initiated. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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