Modification for Quantitative Analysis of Welding Residual Stress by X-Ray Stress Analyzer

Welding residual stress (WRS) has been paid more attention because it would be harmful to safety and intensity of spherical tank. X-ray stress analyzer (XRSA) can be used to non-destructively quantitative analyze WRS. In this study, the real values of Young’s module (E) and Poisson’s ratio (ν) of materials were used to quantitatively calculate. The initial θ0 of materials of welding seam, heat-affected zone and base metal (16MnDR) with zero-stress were detected to analyze influence of quantitative calculation. Moreover, ±5° ψ-oscillation was chosen to use in testing process by XRSA to decrease dispersion of testing data due to large grain size in welding seam and heat-affected zone. Furthermore, XRSA as a non-destructive method will be more used to study WRS of spherical tank, so these results can provide scientific basis for the studying.