Numerical Simulation and Experimental Study on Rapid Cooling Friction Stir Welding of Pure Aluminum Based on DEFORM-3D
The finite element model of conventional friction stir welding(FSW)and rapid cooling FSW of A1050 pure aluminum was established based on DEFORM-3D software,and the effect of the cooling medium on the temperature field and microstructure evolution of the weld was analyzed.The results of the two FSW tests were analyzed to verify the simulation results by using electron backscatter diffraction technique.The results show that the peak temperature of rapid cooling FSW is significantly lower than that of conventional FSW due to addition of cooling medium.The temperature gradient of rapid cooling FSW behind the tool is obviously bigger than that of conventional FSW.Compared with conventional FSW,the rapid cooling FSW weld has finer grains,and the ratio of low-angle grain boundary increases and the dislocation density is bigger.The simulation results are consistent with the experimental results.
pure aluminumfriction stir welding(FSW)temperature fieldmicrostructure
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