Avaliação do campo de tensões residuais por difração de raios - X utilizando o método do sen2ψ em revestimentos metálicos do aço inoxidável S308-l

Abstract

The application of metal coatings by welding of steels and alloys resistant to corrosion is an alternative quite reasonable economically facing the manufacturing of solid components in these alloys. However there is a lack of information about the mechanical /metallurgical changes caused by thermal cycles of welding due to the application of these coatings, especially on the influence on the level of residual stresses, that it is essential to understand the phenomenon of stress-assisted corrosion. The aim of this study was to evaluate the level of the superficial residual stresses in coatings of AWS E308L T-l stainless steel applied by the FCAW process on steel plates ofASTMA36. The measurements of residual stresses were performed by a portable X - ray diffracto meter on the surface of the coatings and the main results obtained were that the nature of residual stresses on the surface of the coatings always showed compressive and no linearity of the magnitude of the residual stresses as a function of the welding energy.