WANG Yuanjian, LIU Kun, XU Nan, et al.SYSWELD Numerical Simulation and Experimental Study on Friction Stir Welded Aluminum Alloy[J].Electric Welding Machine, 2022, 52(7): 1-6. DOI： 10.7512/j.issn.1001-2303.2022.07.01.
SYSWELD Numerical Simulation and Experimental Study on Friction Stir Welded Aluminum Alloy
In actual industrial production, the cost of obtaining weld microstructure and mechanical properties by welding test is high, so numerical simulation has become the main method to predict weld microstructure and mechanical properties.The temperature field and the material flow of friction stir welded 6061-T6 aluminum alloy are established based on SYSWELD software. The microstructure of the weld is characterized by electron backscatter diffraction. The results showed that the peak temperature and material flow rate increased with the increase of the rotation rate. The cross-section of the weld showed an asymmetrical M-shaped temperature distribution, and the temperature on the advancing side was higher than that of the retreating side. Due to the increased rotation rate, the grain size, the ratio of low-angle grain boundaries, and the shear texture intensity increased. At the same rotation rate, the grain size and the ratio of low-angle grain boundaries on the advancing side are larger than those of the retreating side. The microstructure characterization results of the weld are consistent with the simulation results of temperature and material flow.
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