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Fatigue Strength of Weathering Steel
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SYSNO ASEP 0385947 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue Strength of Weathering Steel Author(s) Kunz, Ludvík (UFM-A) RID, ORCID
Lukáš, Petr (UFM-A)
Klusák, Jan (UFM-A) RID, ORCIDNumber of authors 3 Source Title Materials Science - ISSN 1392-1320
Roč. 18, č. 1 (2012), s. 18-22Number of pages 5 s. Language eng - English Country LT - Lithuania Keywords fatigue of weathering steel ; corrosion pits ; fatigue notch factor Subject RIV JL - Materials Fatigue, Friction Mechanics Institutional support UFM-A - RVO:68081723 UT WOS 000302512200004 DOI 10.5755/j01.ms.18.1.1335 Annotation Fatigue behaviour of Atmofix 52 steel (comparable to COR-TEN steel) exposed to atmospheric corrosion for 20 years was investigated. S-N curves for load symmetrical cycling and cycling with stress ratio R = 0 were determined on specimens detracted from a failed transmission tower. The data were compared with those on material without a rust layer. The fracture surfaces and, in particular, the sites of fatigue crack initiation were analyzed. Substantial decrease of fatigue life and fatigue limit due to corrosion exposition was found. Based on observation of surface layer with corrosion products and on fractographic analysis of failed specimens conclusions on fatigue damage mechanism were drawn. No grain boundary corrosion, which can be responsible for fatigue crack initiation, was observed. Initiation of fatigue cracks was related to surface roughness and took place exclusively on corrosion dimples. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2013
Number of the records: 1