An Analysis of Residual Stresses in Pipeline Steel: A Comparative Study using X-Ray Diffraction and Ultrasonic Techniques

The occurrence of residual stresses is inherent in all manufacturing processes, and under external loading, residual and applied stresses can linearly sum even in the elastic regime, leading to unexpected component failure. Therefore, offering alternative techniques that facilitate the qualification and quantification of residual stresses is a task of great significance. In this context, this study aims to provide a comparative study of residual stresses in samples of API X80 steel, using two non-destructive techniques: X-ray diffraction employing the sin²ψ method and ultrasonic testing utilizing the Rayleigh wave. The results demonstrate that the time of flight wave was consistent with the residual stresses measured through X-ray diffraction. The ultrasonic signals exhibited sensitivity to the nature and magnitude of the residual stresses. The comparative analysis provides valuable insights for the selection and application of non-destructive techniques in assessing residual stresses, contributing to the enhanced safety and performance of structures and components.Published in International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 4, pp. 144-154, August 2023. Available online at: https://www.ijaet.org/media/2I76-IJAET1603652-v16-i4-pp144-154.pd