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Surface relief evolution in IN792-5A nickel superalloy under high temperature fatigue straining with hold times
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SYSNO ASEP 0435156 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Surface relief evolution in IN792-5A nickel superalloy under high temperature fatigue straining with hold times Author(s) Šmíd, Miroslav (UFM-A) RID, ORCID
Obrtlík, Karel (UFM-A) RID, ORCIDNumber of authors 2 Source Title Materials Structure and Micromechanics of Fracture VII. - Zurich : Trans Tech Publications, 2014 / Šandera P. - ISSN 1013-9826 - ISBN 978-3-03785-934-6 Pages s. 429-432 Number of pages 4 s. Publication form Print - P Action MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./ Event date 01.07.2013-03.07.2013 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords Nickel-base superalloy ; Surface relief ; Fatigue ; Hold times ; High temperature fatigue Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects FR-TI3/055 GA MPO - Ministry of Industry and Trade (MPO) GAP107/11/2065 GA ČR - Czech Science Foundation (CSF) EE2.3.20.0214 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000336694400095 EID SCOPUS 84891841880 DOI 10.4028/www.scientific.net/KEM.592-593.429 Annotation The present paper is focused on scanning electron microscopy investigation of surface relief developed in cyclically strained specimens at high temperature. Symmetrical fatigue tests without hold times and with tensile or compressive hold times were used in strain control regime. The gauge length of specimens was analyzed after cyclic straining in a wide range of total strain amplitudes. Experimental temperature was 800 °C and selected hold time was 10 minutes. Surface relief is developed during the cyclic straining in localized plastic strain areas. Developed surface relief strongly depends on the type of fatigue test and a value of total strain amplitude. Well-developed surface persistent slip markings were observed after cyclic loading without hold times. Another group of observed slip markings with perpendicular orientation to stress axis exhibits irregular and wavy morphology. Similar markings were also observed on specimen surfaces after fatigue tests with tensile hold times as well as compressive hold times. Third group, named imperfect persistent slip markings, was observed after cyclic straining with tensile holds. In some suitably oriented grains, areas with high density of well-developed markings with irregular morphology were found. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015
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