Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (2): 468-475.doi: 10.13229/j.cnki.jdxbgxb.20230507

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Effect of process sequence on tensile shear properties of PFSSW joints for automotive aluminum sheets

Xin CHEN1(),Xiang-yuan ZHANG1,Zi-tao WU1,2,Gui-shen YU1,Li-fei YANG1   

  1. 1.State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China
    2.New Energy Development Institute，China FAW Group，Changchun 130000，China
  • Received:2023-05-19 Online:2025-02-01 Published:2025-04-16

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Abstract:

For the 1.5 mm thick AA6061-T6 aluminum alloy sheet for bodywork， the effect of two processes on the tensile shear performance of PFSSW-glued spot welding joints was studied using the penetrating glue welding method and the capillary action glue welding method. The temperature field in the lap region was analyzed by the thermal coupling method， and then the tensile shear properties and fracture modes of the joints using different process sequences were compared. The results show that the capillary action glue welding method can significantly improve the tensile shear performance of aluminum sheet joints compared to PFSSW and penetration glue welding methods. Methodological support is provided for the joining process of aluminum sheet metal and other glue welded joints for bodywork.

Key words: vehicle engineering, weld bonding, probeless friction stir spot welding, tensile-shear failure load, fracture morphology

CLC Number: 

  • U465.2

Fig.1

Size of tensile shear specimen/mm"

Fig.2

PFSSW welding equipment and welding"

Table 1

Structural adhesive Aralidte 2015 material properties parameters"

力学性能参数
弹性模量/GPa1.85±0.21
泊松比0.33
剪切模量/GPa0.56±0.21
密度/（kg·mm-3）1 450
拉伸失效强度/MPa21.63±1.61
拉伸失效应变/%4.77±0.21
剪切失效强度/MPa17.9±1.8
剪切失效应变/%43.9±3.4

Fig.3

Hybrid joint of permeable and capillary action welding"

Table 2

Three factors and three levels orthogonal process parameters"

焊接参数参数水平
低（-1）中（0）高（1）
转速/（r·min-1）3 0003 5004 000
下压量/mm0.40.50.6
停留时间/s91215

Fig.4

Dimensions of plate openings and wiring slots"

Fig.5

Results of three factors and three levels orthogonal experiment"

Table 3

Adjusted three-factor three-level parameters"

焊接参数参数水平
低（-1）中（0）高（1）
转速/（r·min-1）2 5003 0003 500
下压量/mm0.40.50.6
停留时间/s6912

Fig.6

Temperature curves at different measuring points"

Fig.7

Temperature field simulation and experimental curve"

Fig.8

Thermal coupling simulation model and boundary conditions of PFSSW"

Fig.9

PFSSW temperature field simulation temperature distribution cloud image"

Fig.10

Tensile shear curves of capillary action welded joints， permeable welded joints and PFSSW welded joints"

Fig.11

Fracture morphology and microstructure of joints prepared by different process sequences"

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