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Fakulteta za strojništvo, Ljubljana (FSLJ)
  • Influence of laser remelted microstructure of cast irons on residual stresses [Elektronski vir]
    Šturm, Roman, 1965- ; Grum, Janez, 1946-
    The presence and amount of residual stresses is very important in dynamically loaded machine parts. In designing dynamically loaded parts designers very frequently demand the presence of compressive ... residual stresses in the surface after the process of heat treatment and finish grinding of the surface, since this increases the fatigue strength of the material and reduces the danger of fracture. In this investigation, the size and variation of residual stresses after laser surface remelting were measured as a function of the modified layer depth on flat specimens from nodular iron. Optimal laser remelting conditions were chosen, while only the overlapping of the remelted traces was varied. To measure the residual stresses, the relaxation method was used, including gradual electro-chemical removal of the modified layer in which the deformation of the specimen was measured by resistance strain gauges. The results of the measured residual stresses confirm that the stresses strongly depend on the presence and quantity of the microstructure constituents in the remelted surface layer.
    Vir: Heat treatment and surface engineering in the manufacturing of metallic engineering components [Elektronski vir] (12 str.)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 11216411

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