Anisotropy of micro-stresses measured by diffraction

We present an original method for the determination of residual stresses in plastically deformed polycrystalline material (1, 2). The advantage of our method is that the anisotropy of residual stress field can be determined. Moreover, the principles of the diffraction experiment for internal stress measurement are recalled. Using the neutron and X-ray techniques, we have determined the first and the second order stresses for cold rolled steel.