![]() The results showed the numerically predicted temperature contours to be in a good agreement with the weld cross section as well as the temperature histories recorded by thermocouples. Employing the X-ray diffraction method (XRD), the field of residual stress was measured in order to validate the accuracy of the mechanical analysis. The verified cooling curves obtained from the thermal simulation were acquired to predict the microstructure of the welding region. The precision of thermal analysis results was verified prior to conducting mechanical analysis. In this paper, a three-dimensional thermo-metallurgical-mechanical finite element method (FEM), using the computational modeling software SYSWELD, was introduced to numerically study the residual stress fields and the distortion of thick welded plates of high-strength quenched and tempered steel (HSQTS) that were caused by hybrid laser/arc welding process in butt-joint configuration. ![]() The level of residual stress around the welding region was as large as the yield stress of the weld and was believed to have created an unwanted permanent deformation. ![]() ![]() Heating and cooling cycles that occur during the fusion joining process generate a significant amount of thermally caused residual stress that negatively influence the integrity and dimensional accuracy of the welded structures. ![]()
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