A Deconvolution Method for the Mapping of Residual Stresses by X-Ray Diffraction

Inherent averaging effects in X-ray diffraction measurement of residual stresses, related to the finite size irradiated area, lead inaccurate measurements presence high surface stress gradients. This paper develops a reconstruction method which allows mapping heterogeneous stresses from averaged measurements. The is based on deconvolution average XRD combination fine grid and use two collimators an overdetermined linear system measured experimentally whose inversion provides values local field. First, successfully assessed reference problem solved by FEM distribution datasets are known. Then, it applied experimental specimen processed repetitive corrugation straightening. reconstructed field agreement with numerical (local) results process. developed this work permits accurate distributions near-surface residual-stresses.