Prediction Of The Temperature Field During Dissimilar Friction Stir Welding Of Aluminum 2024 And Magnesium AZ31 Alloys

Friction stir welding(FSW)technique has been developed rapidly and applied to several areas since invented,major breakthrough were also made in studies about FSW.In this thesis,a Coupled Eulerian-Lagrangian(CEL)finite element model was built in ABAQUS to predict the temperature field during dissimilar friction stir welding of aluminum 2024 and magnesium AZ31 B alloys,experiments were conducted and the model was then verified by comparing with the obtained experimental data.Based on the CEL model,further studies were made about the effect of rotation and transverse speeds on temperature distribution.Conclusions were made that the CEL model was accurate and feasible,it could not only capture the temperature difference between advancing and retreating sides,but also was able to obtain the temperature profiles on the surface of the workpieces;warm area distributed below shoulder of the pin and the maximum temperature did not exceed the melting temperature;with the same distance from the weld line,the peak temperature was higher at the advancing side;the peak temperature decreased as the distance increased.Besides,results showed that the maximum temperature increased with the increase of the rotation speed,but decreased with the increase of the transverse speed.By further comparing their effects,the rotation speed had greater influence.