Three-Dimensional Residual Stress Characterization of Thick Plate Weldments with Advanced Measurement Instrumentation and Methodologies: Final Technical Report for Period January 1984 to April 1986

摘要

A residual study was performed on a thirteen-inch thick, multi-pass, vee groove but weldment of 2-1/4 Cr 1 Mo steel alloy plate. The sample studies was about 13 inches thick by 9.5 inches along the weld by 35 inches normal to the weld, and was cut from a weldment several times larger along the weld and about 48 inches wide normal to the weld. Residual stresses were measured on the two rolled plate faces and on the two faces exposed by sectioning through the weld and which were normal to the weld center line. Nearly two thousand stress measurements were performed on each of the sample faces along several traverse lines and in two directions in the plane of the surface of the face. Several residual stress readings were performed at each location and the mean of these measurements plotted. The plots indicate the three-dimensional stress field extant in the sample. Further, the sample was cut in a plane parallel with the rolled plate surface to provide two sections about 2-1/4 inches thick and about 10-3/4 inches thick. The newly exposed face was mapped for residual stresses as well as one of the previously mapped faces. Nearly ten thousand residual stress measurements were performed on the thirteen-inch thick multi-pass HSLA steel weldment producing over seventy-two individual plots of stress traverses to provide the most thorough experimental analysis of a thick weldment to date. The data clearly illustrates the complexity of the three-dimensional residual stress state in thick multi-pass steel weldments and the magnitude of the difficulties to be faced in developing numerical models for residual stresses in these weldments. (ERA citation 12:022859)