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  • Some factors affecting fatigue resistance of welds = Neki faktori koji utiču na otpornost zavara prema zamoru
    Gliha, Vladimir ; Burzić, Zijah ; Vuherer, Tomaž
    The fatigue strength of polycrystalline metals is hardness and defect size dependent. The fatigue strength of welds depends on the size of grains and actual local mean stress, too. Local mean stress ... is influenced by the global R-ratio and static preloading. The welds in the as-welded condition are pre-stressed due to the existence of welding residual stresses. The sign and magnitude of residual stresses depend on the welding conditions. Changes of residual stresses, hardness and defect size are experimentally determined in the present work. Samples of studied metals are prepared by using either thermal cycle simulator or laboratory furnace and water quenching. The methods of microstructure preparation and type of load result in actual local R-ratio at the used weld toe models. Specimens are cyclic loaded in the similar way as steel at the weld toe. The bottom of the notch is either defect-free or defected by Vickers indentation. Final results show that coarser grain and higher local R-ratios lower the fatigue strength of welds.
    Vir: [Ninth Meeting "New trends in fatigue and fracture" (NT2F9), October 12-14, 2009, Belgrade, Serbia] (Vol. 10, br. 3, 2010, str. 239-244)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2010
    Jezik - angleški
    COBISS.SI-ID - 14779670

    Povezava(-e):

    http://www.divk.org.rs/ivk/ivk10/239-244-IVK3-2010-VG-ZB-TV.pdf
    Digitalna knjižnica Univerze v Mariboru – DKUM

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