Residual Stress Measurements via X-ray Diffraction

The project was carried out to study the use of X-ray diffraction (XRD) technique for residual stress measurement. This project used mild steel as the material for study. An annealed sample of mild steel was used as the reference. Residual stresses were then introduced to the samples by mechanical means via cold-working and by thermal process through welding. The cold-worked sample was prepared by cold-rolling the mild steel plate in the roll machine. For the welded sample, two mild steel plates were welded together in a butt joint.