Research of the Process and Microstructure of Joints of Infrared/Blue Complex Laser Welding of 2A14T6/2A12T4 Aluminum-Copper Alloys

Yan Yin; Jiaming Fu; Ruihua Zhang; Decai Huang; Xiang Dong; Aofei Wang

doi:10.3788/LOP250546

Laser & Optoelectronics Progress, Volume. 62, Issue 17, 1714002(2025)

Research of the Process and Microstructure of Joints of Infrared/Blue Complex Laser Welding of 2A14T6/2A12T4 Aluminum-Copper Alloys

Yan Yin^1、*, Jiaming Fu¹, Ruihua Zhang^2,3, Decai Huang⁴, Xiang Dong¹, and Aofei Wang¹

Author Affiliations

¹State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu , China

²Hardware Knife Cut Industrial Technology Research Institute Yangjiang, Yangjiang 529533, Guangdong , China

³Yangjiang High Power Laser Application Laboratory, Yangjiang 529533, Guangdong , China

⁴Guangdong Hall Laser Technology, Foshan 528251, Guangdong , China

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Figures & Tables(16)

Fig. 1. Infrared-blue hybrid laser welding platform

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Fig. 2. Simplified schematic diagram of infrared-blue hybrid laser welding platform

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Fig. 3. Photos of the macroscopic morphology of T-shaped welds under different welding speeds. (a) 20 mm/s; (b) 30 mm/s; (c) 40 mm/s

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Fig. 4. Photos of the cross-sectional morphology of T-shaped welds at different welding speeds. (a) 20 mm/s; (b) 30 mm/s; (c) 40 mm/s

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Fig. 5. Macroscopic morphology photos of welds under different infrared light powers. (a) 4000 W; (b) 4500 W; (c) 5000 W

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Fig. 6. Photos of cross-sectional morphology of T-shaped welds under different infrared light powers. (a) 4000 W; (b) 4500 W; (c) 5000 W

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Fig. 7. Macroscopic morphology photos of welds under different blue light powers. (a) 0 W; (b) 300 W; (c) 600 W

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Fig. 8. Photos of the cross-sectional morphology of T-shaped welds under different blue light powers. (a) 0 W; (b) 300 W; (c) 600 W

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Fig. 9. XRD pattern of skin stringer and weld area

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Fig. 10. Microstructure photos near the fusion line of the weld seam

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Fig. 11. SEM micrograph photos of the fusion line of the weld seam

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Fig. 12. EDS point scan test results of precipitated phases at the fusion line of the weld seam

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Fig. 13. SEM microstructure of weld center

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Fig. 14. EDS test results of precipitated phases at the center of the weld seam

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Table 1. Chemical composition of 2A12-T4 and 2A14-T6
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Table 1. Chemical composition of 2A12-T4 and 2A14-T6
Type Cu Mg Mn Fe Si Zr Al
2A12-T4 4.2 1.6 0.7 0.2 0.3 0.07 Bal.
2A14-T6 4.4 0.9 0.6 0.5 0.7 Bal.

Table 2. Welding process parameters
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Table 2. Welding process parameters
Sample No. Infrared laser power /W Blue light power /W Welding speed /（mm/s）
1 4000 600 20
2 4000 600 30
3 4000 600 40
4 4500 600 30
5 5000 600 30
6 4000 0 30
7 4000 300 30

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Yan Yin, Jiaming Fu, Ruihua Zhang, Decai Huang, Xiang Dong, Aofei Wang. Research of the Process and Microstructure of Joints of Infrared/Blue Complex Laser Welding of 2A14T6/2A12T4 Aluminum-Copper Alloys[J]. Laser & Optoelectronics Progress, 2025, 62(17): 1714002

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