Due to the intensive industrial development, there is an increasing need for timely and reliable diagnosis of critical constructions, particularly pipelines. The analysis of the stress-strain state of pipelines, including their welds, is an urgent task, since the existing residual stress gradients in the weld affect sustainably its strength. The object of the study was a welded OCTG pipe made of 13CrVA steel with the increased resistance in corrosive environments. Welded joint was obtained by the induction welding technique, a feature of which is an extremely narrow weld. This circumstance makes it difficult to control residual stresses in such welds by widely used X-ray analysis methods. The method of EBSD analysis was used to qualitatively estimate the residual stresses in individual grains of metal in different zones of the welded pipe. It is shown that there is a qualitative correspondence of the obtained results with a standardized X-ray structural analysis method.
展开▼
