Abstract
For examining characteristics of residual stress generated by patch welding on a steel member under the tensile loading, a series of experiments and numerical simulation were carried out. The difference of residual stress around the weld metal between the case under the constant tensile loading and that without loading was almost the same as the stress applied by loading. On the other hand, the difference of residual stress in the base metal was larger than that around the weld metal due to the effects by not only the loading but also the restraint. Furthermore, the residual stress was released by annealing under the loading with using a portable ceramic heater. Although the residual stress was released without being affected by the loading, the stress was re-generated during the cooling process in annealing. However, the tensile residual stress became around 30% of the welding residual stress by annealing.
