Schematic layout of the neutron diffractometer for residual stress mapping. The incident and diffracted beams are defined with a pair of masking slits inserted before and after the specimen. The incident and diffracted beams form the sampling volume. The specimen is mounted on a three dimensional translation stage. Diffracted neutrons are collected using a position sensitive detector.

Schematic illustrating the principle of residual stress measurements by diffraction methods. Residual strains in the material under study are determined via precise measurement of the Bragg angle of a diffraction peak.