Residual Stresses Measurement on a Repaired Stainless Steel Welded Cylinder, Using a Combination of Techniques

摘要

Residual stresses are introduced into engineering components during welding and other manufacturing processes. Knowledge of these stresses can help to determine the structural integrity of the component and prevent stress corrosion cracking, therefore understanding the distribution and magnitude of residual stresses is very important. This paper presents the work carried out on a stainless steel pipe manufactured by cold rolling 17mm thick, 304 stainless steel plates to form three tubes attached with circumferential welds to create a full cylinder of roughly 3660mm axial length, 1710mm outer diameter and 17mm thickness.In order to quantify the residual stresses in the cylinder the Contour, iDHD, ICHD and XRD measurements were carried out at different locations, including the circumferential weld, the seam weld and the repaired location. Additionally, ultrasonic residual stress measurements were carried out to detect weld repair locations and were particularly effective at identifying the hotspot locations.