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Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties
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SYSNO ASEP 0544868 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties Author(s) Trávníček, Lukáš (UFM-A) RID, ORCID
Kuběna, Ivo (UFM-A) RID, ORCID
Mazánová, Veronika (UFM-A)
Vojtek, Tomáš (UFM-A) ORCID
Polák, Jaroslav (UFM-A) RID, ORCID
Hutař, Pavel (UFM-A) RID, ORCID
Šmíd, Miroslav (UFM-A) RID, ORCIDNumber of authors 7 Article number 475 Source Title Metals. - : MDPI
Roč. 11, č. 3 (2021)Number of pages 20 s. Language eng - English Country CH - Switzerland Keywords short fatigue crack ; large scale yielding ; low cycle fatigue ; J-integral ; austenitic stainless steel ; residual lifetime prediction Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GJ19-25591Y GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFM-A - RVO:68081723 UT WOS 000633884600001 EID SCOPUS 85102368809 DOI 10.3390/met11030475 Annotation In this work two approaches to the description of short fatigue crack growth rate under large-scale yielding condition were comprehensively tested: (i) plastic component of the J-integral and (ii) Polak model of crack propagation. The ability to predict residual fatigue life of bodies with short initial cracks was studied for stainless steels Sanicro 25 and 304L. Despite their coarse microstructure and very different cyclic stress-strain response, the employed continuum mechanics models were found to give satisfactory results. Finite element modeling was used to determine the J-integrals and to simulate the evolution of crack front shapes, which corresponded to the real cracks observed on the fracture surfaces of the specimens. Residual fatigue lives estimated by these models were in good agreement with the number of cycles to failure of individual test specimens strained at various total strain amplitudes. Moreover, the crack growth rates of both investigated materials fell onto the same curve that was previously obtained for other steels with different properties. Such a aster curve was achieved using the plastic part of J-integral and it has the potential of being an advantageous tool to model the fatigue crack propagation under large-scale yielding regime without a need of any additional experimental data. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2022 Electronic address https://www.mdpi.com/2075-4701/11/3/475
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