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Fatigue behavior of AW7075 aluminum alloy in ultra-high cycle fatigue region

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    SYSNO ASEP0523973
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleFatigue 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, ORCID
    Number of authors5
    Article number138922
    Source TitleMaterials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
    Roč. 774, FEB (2020)
    Number of pages8 s.
    Languageeng - English
    CountryCH - Switzerland
    Keywordsprecipitate-free zones ; anodic-oxidation ; mechanisms ; performance ; damage ; life ; Fatigue ; Ultra-high cycle fatigue ; Fatigue crack initiation ; Fatigue damage ; aw7075
    Subject RIVJG - Metallurgy
    OECD categoryMaterials engineering
    R&D ProjectsEF16_013/0001823 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    Method of publishingLimited access
    Institutional supportUFM-A - RVO:68081723
    UT WOS000514747200013
    EID SCOPUS85077674805
    DOI10.1016/j.msea.2020.138922
    AnnotationAdvanced 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.
    WorkplaceInstitute of Physics of Materials
    ContactYvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
    Year of Publishing2021
    Electronic addresshttps://doi.org/10.1016/j.msea.2020.138922
Number of the records: 1