Abstract
The purpose of this study was to obtain the basic data on distributions of residual stresses in various types of aluminum welded joints. In this paper, the effects of dimensions and heat input during welding operations on residual stress distributions of 5083-0 butt joints are discussed.The residual stresses were calculated from the strains which still remained when the welded joint was cut into sections to release the stresses. The strains were measured by using resistance strain gages.In conclusion, the following results were obtained:(1) As general properties of residual stresses in welding, high tensile residual stresses having the magnitude nearly as large as the yield strength of the material appeared near the bead in the direction parallel to the weld line. However, the stresses normal to the weld line were smaller than those parallel to the line.(2) The maximum value of tensile residual stress was related to the length of the welded joint, but not so much dependent on its width.(3) Little effect of the heat input was given on residual stresses.
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