A method for residual stress measurement in welded seams

Abstract

The paper discusses a method for residual stress measurement in the direction transverse to the welded seam. The residual stresses are measured by means of electrochemical removal and the simultaneous measurement of strain using a strain gauge. The method is simple and enables measurement over the whole cross-section of the welded specimen: this ability is the most significant feature of this method. The method enables optimisation of the welding parameters. It is possible to analyse the influence of each individual pass of the welding electrode on the residual stress distribution, the latter being very important in dynamically loaded welded parts. The present method for residual stress measurement is not only useful for the welding of parts, but is helpful also in a variety of other applications.