Abstract
In this paper investigation of FEM based thermal analysis of Gas Tungsten Arc welding of 2 mm thick plate ferritic martensitic steel plate was carried out. Three dimensional thermo-elastic model based on FEA was carried using two different softwares SYSWELD and FlexPDE. In the initial part of the work, heat source fitting (HSF) was carried out using Grade 91 steel bead on plate welding. Predicted weld profile using heat source fitting tool was compared with predicted models. In both the softwares step-by-step modeling has been carried out using HSF analysis tool. In the second step square butt joint welding of Grade 91 steel was carried.
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