Tensile features of welded joint testing by thermography

Аннотация

The paper shows the results obtained in the comparative testing of the welded joints using conventional methods and thermography. The testing aim, using specimen tension of butt welded joint for S 355J2G3 steel (removed from the parts of lug assembly of dredger anchor steel-wire rope Sch Rs 1760/5x32) was to determine the tensile features of welded joint by introducing the load transversally to the welded joint. The temperature changes on the tested sample were continuously recorded by thermography, providing to predict attaining the critical stresses, which cause the appearance of fissures, that is, to define the criteria on determining the maximum sample temperature alteration in the field of the elastic and elastoplastic strains.