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Fractural based microstructural damane evaluation in Ni-based superalloy gas turbine blades
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SYSNO ASEP 0358287 Druh ASEP K - Konferenční příspěvek (lokální konf.) Zařazení RIV Stať ve sborníku Název Fractural based microstructural damane evaluation in Ni-based superalloy gas turbine blades Tvůrce(i) Tarafder, M. (IN)
Dlouhý, Ivo (UFM-A) RID, ORCID
Hore, S. (IN)
Das, S. K. (IN)Zdroj.dok. New Methods of Damage and Failure Analysis of Structural Parts. - Ostrava : VŠB - TU Ostrava, 2010 / Strnadel B. - ISBN 978-80-248-2265-5
S. 253-261Poč.str. 9 s. Akce New Methods of Damage and Failure Analysis of Structural Parts Datum konání 06.09.2010-10.09.2010 Místo konání Ostrava Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova Ni-base superalloy ; gas turbine ; microstructure ; hardness ; fractal dimension Vědní obor RIV JL - Únava materiálu a lomová mechanika CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000393446100031 Anotace A fractal based evaluation of microstructural damage in Ni based superalloy cast IN 738 LC used in gas turbine blades is presented in the paper. Non-destructive in-situ replica method was used without damaging the blades for the evaluation of microstructure. The theoretical life of the stator blades of the gas turbine, which was exposed to temperature varying between 1060°C to 1100°C, was approximately 100,000 hours. In order to assess the suitability of the stator blades after 50% of the service life, fractal based microstructural damage evaluation has been conducted. The fractal dimensions of the in situ metallographic images can be correlated to the progressive deterioration of hardness at various locations of the blades. The extent of damage is inversely proportional to the fractal dimension. For fractal dimension below 2.4, the material can be classified as substantially damaged. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2011
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