NONDESTRUCTIVE CONTROL OF RESIDUAL STRESS STATE OF WELD REGIONS BY X-RAY DIFFRACTION METHODS

摘要

The use of X-ray diffraction methods provides the wide possibilities of applying of X-ray tensometry to nondestructive control of residual stresses arising after different technologies, especially after welding processes. In this paper the "sin~2-ψ"method of X-ray stress analysis using diffractometer with proportional coordinate sensitive detector is presented. The high sensibility of detector permits to diminish the width of irradiated area up to 0,1 mm and gives possibility to realise the measurements of residual stress distribution in weld region. The study of different causes forming real residual stress distribution in weld region is carried out.