Effect of simulated axial residual stress and transverse residual stress in welded P92 pipe and plates including plasticity error

Abstract

The paper deals with the measurement of the residual stresses in P92 welded pipe using the blind hole drilling technique.The post weld heat treatment (PWHT) of P92 welded pipe was also conducted to study their effect on residual stresses .The P92 pipe weld joints were prepared using gas tungsten arc welding process. The residual stress measurement was carried out using the strain gauge rosette that was associated with the plastic deformation of material and stress concentration effect of multi-point cutting tool. The corrective formulation was developed for calculating the corrected value of residual stresses from the experimentally obtained strain value. The Strain gauge response was estimated experimentally using the tensile testing for the uniaxial loading while finite element analysis was performed for biaxial loading. Gas tungsten arc welds joint was prepared for conventional V-groove and narrow groove design.