Počet záznamů: 1
Analysis of Effective and Internal Cyclic Stress Components in the Inconel Superalloy Fatigued at Elevated Temperature
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SYSNO ASEP 0387035 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Analysis of Effective and Internal Cyclic Stress Components in the Inconel Superalloy Fatigued at Elevated Temperature Tvůrce(i) Šmíd, Miroslav (UFM-A) RID, ORCID
Petrenec, Martin (UFM-A)
Polák, Jaroslav (UFM-A) RID, ORCID
Obrtlík, Karel (UFM-A) RID, ORCID
Chlupová, Alice (UFM-A) RID, ORCIDCelkový počet autorů 5 Zdroj.dok. Advanced Materials Research. - Uetikon-Zuerich : Trans Tech Publications / Pullin R. - ISSN 1022-6680
Roč. 278, 4 July (2011), s. 393-398Poč.str. 6 s. Akce European Symposium on Superalloys and their Application Datum konání 25.5.2010-28.5.2010 Místo konání Wildbad Kreuth Země DE - Německo Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova low cycle fatigue ; superalloys ; high temperature ; hysteresis loop ; effective and internal stresses Vědní obor RIV JL - Únava materiálu a lomová mechanika Vědní obor RIV – spolupráce Ústav fyziky materiálu - Únava materiálu a lomová mechanika CEP GA106/08/1631 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000303548400066 DOI https://doi.org/10.4028/www.scientific.net/AMR.278.393 Anotace Cyclic multiple step test in strain control have been performed on cylindrical specimens of cast polycrystalline Inconel 738LC and 792-5A nickel-base superalloys at 800 °C in laboratory atmosphere. Selected hysteresis loops were derived and analysed according to the statistical theory of hysteresis loop. The effective and internal stress components were possible to determine. The effective stress of γ´ precipitate has significant influence on stress-strain response of studied materials. Therefore IN 792-5A exhibits higher stress amplitudes than IN 738LC at approximately same total strain amplitude values, because of significantly higher effective stress of γ´. Cyclic hardening/softening curves and shortened cyclic stress-strain curves were obtained. Cyclic hardening/softening behaviour depends on strain amplitude. Low amplitude straining was characterised by saturation of the stress amplitude. In high amplitude straining slight softening was found. The shortened cyclic stress-strain curves for both materials can be fitted by power law. The curve of the IN 792-5A is shifted to higher stress values. Cyclic stress-strain response is compared in relation to changes of internal and effective stress components and microstructural parameters of the material. Surface relief of gauge length was observed and persistent slip markings were observed. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2013
Počet záznamů: 1