Thermal Science 2022 Volume 26, Issue 3 Part A, Pages: 2125-2134
https://doi.org/10.2298/TSCI210216186V
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Thermo-mechanical analysis of linear welding stage in friction stir welding: Influence of welding parameters
Veljić Darko M. (Innovation Center of the Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia), veljic.darko@gmail.com
Rakin Marko P. 
(Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia)
Sedmak Aleksandar S. (Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia)
Radović Nenad A. (Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia)
Međo Bojan I. (Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia)
Mrdak Mihailo R. (Innovation Center of the Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia)
Bajić Darko R. (Faculty of Mechanical Engineering University of Montenegro, Podgorica, Montenegro)
The influence of friction stir welding parameters on thermo-mechanical behavior of the material during welding is analyzed. An aluminum alloy is considered (Al 2024 T351), and different rotating and welding speeds are applied. The finite element model consists of the working plate (Al alloy), backing plate and welding tool. The influence of the welding conditions on material behavior is taken into account the application of the Johnson-Cook material model. The rotation speed of the tool affects the results. If increased, it contributes to an increase of friction-generated heat intensity. The other component of the generated heat, which stems from the plastic deformation of the material, is negligibly changed. When the welding speed, i.e. tool translation speed, is increased, the intensity of friction-generated heat decreases, while the heat generation due to plastic deforming is becoming more pronounced. Summed, this leads to rather small change of the total generation. The changes of the heat generation influence both the temperature field and reaction force. Also, the inadequate selection of welding parameters resulted in occurrence of the defects (pores) in the model.
Keywords: friction stir welding, welding speed, heat generation, welding tool rotation speed, finite element analysis
Projects of the Serbian Ministry of Education, Science and Technological Development, Grant no. 451-03-68/2020-14/ 200287 and Grant no. 451-03-68/2020-14/200135
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