Numerical Simulation and Mechanical Properties of 6063/6082 Dissimilar Joints by Laser Welding
Source abstract
Abstract
In this paper, the laser welding process of 6082-T6 and 6063-T6 dissimilar aluminum alloys with a thickness of 2.5 mm was numerically simulated by using a rotary surface Gauss heat source and the flow state of the weld pool was analyzed. The microstructure and mechanical properties of the welded joint (WJ) with a laser power of 1.75 kW were also studied. The results show that the recoil pressure in the molten pool tends to be stable with the increase in welding power, and the surface tension was the main driving force affecting the liquid metal flow in the molten pool. Under the action of 1.75 kW of laser power, the macromorphology of the weld was complete, continuous, and clear. The weld metal zone (WMZ) near both sides of the fusion line (FL) was columnar in microstructure, and the center of the WMZ was dominated by equiaxed crystals. The average microhardness of WMZ was 73.46 HV, which was lower than the base material zone (BM) and heat-affected zone (HAZ). The fracture region of the tensile specimen was located in HAZ on the 6063-T6 side of WJ, showing ductile fracture characteristics with a tensile strength of 180.8 MPa and elongation of 4.04%.
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Research context
OpenAlex topics: Welding Techniques and Residual Stresses · Additive Manufacturing Materials and Processes · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
HNU College of Mechanical and Vehicle Engineering, Hunan Univerisity, Changsha 410082, China
School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Dongfeng Liuzhou Automobile Co., Ltd., Liuzhou 545006, China
Funding
China Postdoctoral Science Foundation · Science and Technology Planning Project of Liuzhou · Guangxi University of Science and Technology Doctoral Fund
References (24)
Show source-provided references
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