scope:

This European Standard describes the test method for the determination of macroscopic residual or applied stresses non-destructively by X-ray diffraction analysis in the near-surface region of a polycrystalline specimen or component. All materials with a sufficient degree of crystallinity can be analysed, but limitations may arise in the following cases (brief indications are given in Clause 12): Stress gradients; Lattice constants gradient ; Surface roughness; Non-flat surfaces (see 5.1.2); Highly textured materials; Coarse grained material (see 5.1.4); Multiphase materials; Overlapping diffraction lines; Broad diffraction lines.