Abstract
Welding residual stress and distortion are strongly linked together. One of the ways to control or reduce the welding distortions is the manipulation of the generated stresses during welding, and final residual stresses exist in the workpiece (stress engineering). In this paper, the control of gas metal arc butt welding distortion of 500 × 250 × 6 mm3 AH36 plates by means of additional heat sources is studied using experimental and numerical approaches. To understand the distortion reduction mechanism, 3D finite element model has been constructed and validated by temperature, distortion and residual stress measurements together with microstructure investigation. The numerical results are compared to that of the experimental measurements.
Highlights
Welding distortion is a permanent change in shape of a component due to the welding-induced& Transverse shrinkage& Longitudinal shrinkage& Rotational distortion& Angular distortion& Bending distortion& BucklingFigure 1 shows the different types of welding distortion [4]
It should be mentioned that in reality, multiple types of welding distortion may occur at the same time and that it is sometimes difficult to distinguish the types of distortion present in a workpiece [4]
Attempts have been made to study the welding with additional heating of AH36 plates with dimensions of 500 × 250 × 6 mm3
Summary
Welding distortion is a permanent change in shape of a component (or an instability) due to the welding-induced. & Bending distortion (distortion in a plane through the weld line and perpendicular to the plate). As reported in [5], in 1990, a Japanese Patent showed a method to reduce buckling deformation for thin metal sheet using additional heating sources parallel to the welding torch located at or near plates’ edges. Since the heaters are located rather far to the welding torch, the method is called side heating. Attempts have been made to study the welding with additional heating of AH36 plates with dimensions of 500 × 250 × 6 mm. Attempts have been made to study the welding with additional heating of AH36 plates with dimensions of 500 × 250 × 6 mm3 Both experimental and numerical approaches have been used in this investigation. The results of such approaches are compared for two situations: (1) conventional welding and (2) welding with additional heating
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