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High cycle fatigue of nickel-based superalloy MAR-M 247 at high temperatures
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SYSNO ASEP 0435146 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title High cycle fatigue of nickel-based superalloy MAR-M 247 at high temperatures Author(s) Šmíd, Miroslav (UFM-A) RID, ORCID
Kunz, Ludvík (UFM-A) RID, ORCID
Hutař, Pavel (UFM-A) RID, ORCID
Hrbáček, K. (CZ)Number of authors 4 Source Title XVII International Colloquium on Mechanical Fatigue of Metals (ICMFM17). - Amsterdam : Elsevier, 2014 / Gulagliano M. ; Vergani L. - ISSN 1877-7058 Pages s. 329-332 Number of pages 4 s. Publication form Online - E Action ICMFM 2014 International Colloquium on Mechanical Fatigue of Metals /17./ Event date 25.06.2014-27.06.2014 VEvent location Verbania Country IT - Italy Event type WRD Language eng - English Country NL - Netherlands Keywords High cycle fatigue ; Superalloy ; MAR-M 247 ; High temperature ; Fracture surface ; S-N curve Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects FR-TI4/030 GA MPO - Ministry of Industry and Trade (MPO) EE2.3.20.0214 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000396733300060 EID SCOPUS 84904421075 DOI 10.1016/j.proeng.2014.06.273 Annotation The nickel-based superalloy MAR-M 247 was experimentally studied in the area of high-cycle fatigue at temperatures 650, 800 and 900 °C. The alloy, a cast polycrystalline material processed by hot isostatic pressing (HIP), was subjected to symmetrical cyclic loading. The fracture surfaces of specimens were studied by scanning electron microscopy from the perspective of the influence of temperature on the fatigue damage mechanism and fatigue crack initiation. The extent of Stage I of crystallographic fatigue crack propagation and non-crystallographic Stage II differs with various test temperatures. Fatigue crack initiation sites were predominantly shrinkage pores inherited from casting. The general description of governing mechanisms of the fatigue crack initiation and the crack propagation are proposed. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015
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