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High Cycle Fatigue Data Transferability of MAR-M 247 Superalloy from Separately Cast Specimens to Real Gas Turbine Blade
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SYSNO ASEP 0534779 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High Cycle Fatigue Data Transferability of MAR-M 247 Superalloy from Separately Cast Specimens to Real Gas Turbine Blade Author(s) Šmíd, Miroslav (UFM-A) RID, ORCID
Horník, Vít (UFM-A)
Kunz, Ludvík (UFM-A) RID, ORCID
Hrbáček, Karel (UFM-A)
Hutař, Pavel (UFM-A) RID, ORCIDNumber of authors 5 Article number 1460 Source Title Metals. - : MDPI
Roč. 10, č. 11 (2020)Number of pages 16 s. Language eng - English Country CH - Switzerland Keywords high-temperature fatigue ; nickel-based superalloy ; investment casting ; metallography ; turbine blade Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Mechanical engineering R&D Projects LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EG15_019/0004399 GA MPO - Ministry of Industry and Trade (MPO) Research Infrastructure IPMINFRA - 90069 - Ústav fyziky materiálů AV ČR, v. v. i. Method of publishing Open access Institutional support UFM-A - RVO:68081723 UT WOS 000593263400001 EID SCOPUS 85094857586 DOI 10.3390/met10111460 Annotation Cast polycrystalline superalloys are widely used for critical components in aerospace and
automotive industries, such as turbine blades or turbocharges. Therefore, their fatigue endurance
belongs to one of the most essential mechanical characteristics. Full-scale testing of such components
involves great technical difficulties and requires significant experimental effort. The present study
evaluates the effects of microstructural parameters with respect to representative fatigue testing of a
cast turbine blade by separately cast specimens. For that purpose, the cast polycrystalline MAR-M 247
Ni-based superalloy was investigated in the following conditions: (i) specimens extracted from a real
gas turbine blade, specimens separately cast into the mould with (ii) top or (iii) bottom filling systems.
Obtained diverse microstructures allowed us to assess the effect of grain size, porosity, and texture on
fatigue performance. The tests were held at a symmetrical loading regime at temperature 800 °C
in laboratory air. The results indicate that the level of porosity is a dominant structural parameter
determining the fatigue endurance, while grain size and texture effects were of minor importance
contributing mainly to fatigue life scatter.Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2021 Electronic address https://www.mdpi.com/2075-4701/10/11/1460
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