Effect of Weld Parameters on Residual Stress Distribution in Flux Cored Arc Welding of High Strength Low Alloy Steel

Various types of high strength steels are increasingly used for producing welded structures with reduced weight and improved performance. Welding problems related to residual stress and distortion can arise, since yield stress of these steels are high, there is always a possibility of producing very high residual stresses in some locations near the weld. In general residual stresses become dangerous if they lead to local multi axiallity of tension stresses, which favour brittle fracture, knowledge of the residual- stress distribution in welds is necessary in order to assess the risk of crack growth in service The distribution of residual stresses after welding depends strongly on the weld parameters Attempts were made to study the influence of weld parameters (arc voltage, travel speed, welding current) on residual stresses pattern of high strength low alloy steel weldments This study was mainly performed by using X-ray stress analyzer.