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Fatigue behavior of AW7075 aluminum alloy in ultra-high cycle fatigue region
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SYSNO ASEP 0523973 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue behavior of AW7075 aluminum alloy in ultra-high cycle fatigue region Author(s) Fintová, Stanislava (UFM-A) ORCID
Kuběna, Ivo (UFM-A) RID, ORCID
Trško, L. (SK)
Horník, Vít (UFM-A)
Kunz, Ludvík (UFM-A) RID, ORCIDNumber of authors 5 Article number 138922 Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 774, FEB (2020)Number of pages 8 s. Language eng - English Country CH - Switzerland Keywords precipitate-free zones ; anodic-oxidation ; mechanisms ; performance ; damage ; life ; Fatigue ; Ultra-high cycle fatigue ; Fatigue crack initiation ; Fatigue damage ; aw7075 Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects EF16_013/0001823 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000514747200013 EID SCOPUS 85077674805 DOI https://doi.org/10.1016/j.msea.2020.138922 Annotation Advanced electron microscopy methods were used with the aim to explain the differences in the response of strengthened AW 7075 T6511 aluminum alloy to fatigue loading at 5 Hz and 20 kHz. The shift of the S-N curve to higher number of cycles to fracture for the specimens tested at high frequency was experimentally determined. This effect is not connected with a change of the fatigue crack initiation mechanism and site from the surface to material interior. The absence of slip markings and cracking of primary intermetallic particles on the surface of cycled specimens were characteristic features. A difference in the dislocation density and dislocation arrangement in the vicinity of the fatigue crack initiation sites was shown to be the only observable effect. However, consistent with the strengthened structure of the alloy, no specific dislocation structure due to the cyclic loading was observed, regardless of the loading frequency and stress amplitude. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2021 Electronic address https://doi.org/10.1016/j.msea.2020.138922
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