X-Ray Diffraction Technique for Residual Stress Measurement in NiCrMo Alloy Weld Metal

Figure 11

Computer simulation used for residual stress determination in Ni-based superalloy 625 weld metal: (a) X-ray diffraction intensities expressed by equation (7) where 1 and 2 are intensities for tilts equal to 0° and 55° and residual stress distributions and 3 and 4 are stress distribution for equal to 50 MPa and 200 MPa, respectively; (b, c) procedures of diffraction line simulation where 1 and 2 are the total and the first layer diffraction profiles, respectively; (d) stress determination by “ method” where 1, 2, and 3 are the functions for constant residual stress introduced by brushing, obtained by simulation, and for annealed weld metal, respectively.