Analysis on the Residual Stresses in the Aluminum Alloy Friction Stir Welded Joints

摘要

The residual stress fields can have strong influences on the integrity and performance of friction stir welded aluminum alloy structure, comprehensive insight into the residual stress distribution is the key to the Friction stir welding (FSW) engineering application for a wide range of materials and thicknesses improving the weld strength and fatigue life. In this paper, the current state of the residual stresses in the FSW aluminum alloy joints is reviewed, The focus is on recent advances of experimental research, the results of numerical simulation analysis, and the effects of the technological parameters (welding speed, rotational speed, shoulder geometry et al.) on residual stress fields was evaluated. In the end the controlling technique of residual stresses from published literatures is summarized.