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  • High cycle fatigue of welded joints with aging influence
    Zaletelj, Henrik ...
    Fatigue loading appears frequently at many machine parts and it can, under certain conditions, cause a failure. Many parts of an internal combustion engine are subjected to a raised temperature where ... the fatigue properties are different than they are at room temperature. The exhaust system is one of the parts that are loaded with fatigue at different temperatures, known as thermo-mechanical fatigue (TMF). Welds are used frequently in the exhaust system and present critical locations for crack initiation. During loading initial crack can propagate through a section to a final failure, so if the lifetime of the exhaust system is determined by the results of a base material, it can be misjudged. In the paper it is presented that the fatigue degradation regards to the weld influence. Test sample preparation, material and special high cycle fatigue testing manner are also presented. Test specimens without weld, with weld and additionally with aging influence are used. The material exposure to increased temperature over time affects the stress-strain response and other mechanical properties. This effect is known as aging and the results of this influence on the fatigue of welded parts are presented and discussed.
    Vir: Materials & design. - ISSN 0264-1275 (Vol. 45, Mar. 2013, str. 190-197)
    Vrsta gradiva - članek, sestavni del
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 12456731
    DOI

vir: Materials & design. - ISSN 0264-1275 (Vol. 45, Mar. 2013, str. 190-197)
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