(Universidade Federal do Pará, 2021-12-22) BARILE, Iury Klay Peres; COSTA, Ednelson da Silva; http://lattes.cnpq.br/0045584096510351; HTTPS://ORCID.ORG/0000-0002-7290-3810; MACHADO, Paulo Cordeiro; http://lattes.cnpq.br/0133330144786049; https://orcid.org/0000-0003-4375-6812
The process of manufacturing and welding in rail induces residual stresses that can act
in a deleterious way to the structural integrity of this component, especially in cases where the
tractive stresses, can favor the nucleation and propagation of cracks, may cause premature rail
failure. The objective this work is evaluate the residual stresses of rails welded by flash butt
welding (FBW) with and without heat treatment post welding with forced air cooling. The techniques measurement of residual stress ultrasound using shear waves in the metal base and hole
Drilling in the center of the weld and in the zone thermally affected (HAZ). The techniques
presented similar results to those found in the literature, for the head, tensile stresses were found
in the base metal region, and compressive stresses in the HAZ and center of the weld. In the
web, tensile stresses were found at the HAZ and the center of the weld.
