Welding residual stresses and their relaxation under cyclic loading in welded S550 steel plates

• We investigate residual stresses and their relaxation in welded steel plates. Residual stress relaxations rely on redistribution plastic deformations . The its affect the ratio fatigue loads. does not vary range. This paper presents experimental numerical investigations to determine surface through-thickness welding butt-welded plates under actions. X-ray diffraction measurement validates accuracy of thermal–mechanical analyses estimating as-welded cyclic loading. findings reveal that occurs mostly within first loading cycle. amount depends deformation incurred, hence maximum load without changing