Numerical Simulation on High Speed Friction Stir Welding of 6061-T6 Aluminum Alloy
Based on the Coupled Eulerian Lagrangian(CEL)method,the numerical model of high speed friction stir welding of 6061 aluminum alloy sheet was established,and the characteristics of temperature field and deformation field under high speed welding process were studied,and the plastic flow law of the material in welding zone was studied by using tracer particle method.High speed friction stir welding experiments were carried out to verify the numerical model from the temperature field,macroscopic appearance and internal defects.The results show that the application of the model can accurately describe the temperature field and deformation field during high speed friction stir welding,and it can also accurately predict the location and size of welding defects.Compared with conventional friction stir welding,high speed friction stir welding has a denser temperature gradient in the welding direction and cross-section,and the plastic strain area is more concentrated,and its heat affected zone is smaller.
high speed friction stir weldingtemperature fielddeformation fieldtracer particlenumerical simulation
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