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Chinese Journal of Lasers, Volume. 47, Issue 8, 802003(2020)

Investigation on Porosity, Microstructures and Performances of 6A01-T5 Aluminum Alloy Joint by Oscillating Fiber Laser-CMT Hybrid Welding

Wen Peng1, Li Zhongxiu1, Zhang Song1, Wang Chuanqiang2, Mao Zhendong3, Han Xiaohui3, and Wu Shikai1,4、*
Author Affiliations
  • 1Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
  • 2Nanjing Zhongke Raycham Laser Technology Co., Ltd., Nanjing, Jiangsu 210038, China
  • 3CRRC Qingdao Sifang Co., Ltd., Qingdao, Shandong 266111, China
  • 4Shanghai Institute of Optics and Fine Mechanics,China Academy of Science, Shanghai 201800, China
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    AbstractGet PDF(in Chinese)
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    References (26)
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    Figures & Tables(14)
    Schematic of hybrid welding setup

    Fig. 1. Schematic of hybrid welding setup

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    Size of fagitue and tensile specimens

    Fig. 2. Size of fagitue and tensile specimens

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    Weld bead morphology. (a) Surface appearance of weld bead welded by oscillating laser hybrid welding; (b) surface morphology of weld bead welded by non-oscillating laser hybrid welding; (c) cross-section of weld bead welded by oscillating laser hybrid welding; (d) cross-section of weld bead welded by non-oscillating laser hybrid welding

    Fig. 3. Weld bead morphology. (a) Surface appearance of weld bead welded by oscillating laser hybrid welding; (b) surface morphology of weld bead welded by non-oscillating laser hybrid welding; (c) cross-section of weld bead welded by oscillating laser hybrid welding; (d) cross-section of weld bead welded by non-oscillating laser hybrid welding

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    Porosity distribution on weld bead longitudinal section. (a)(b) Weld bead formed by non-oscillating laser hybrid welding; (c)(d) weld bead formed by oscillating laser hybrid welding

    Fig. 4. Porosity distribution on weld bead longitudinal section. (a)(b) Weld bead formed by non-oscillating laser hybrid welding; (c)(d) weld bead formed by oscillating laser hybrid welding

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    Porosity distribution on weld bead cross-section. (a) Non-oscillating laser hybrid welding; (b) oscillating laser hybrid welding

    Fig. 5. Porosity distribution on weld bead cross-section. (a) Non-oscillating laser hybrid welding; (b) oscillating laser hybrid welding

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    Statistical data of porosity on weld bead cross-section under two kinds of hybrid welding modes. (a) Porosity rate; (b)average number of porosities with different diameters

    Fig. 6. Statistical data of porosity on weld bead cross-section under two kinds of hybrid welding modes. (a) Porosity rate; (b)average number of porosities with different diameters

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    Microstructures of the hybrid welding joint. (a) Upper part of the fusion line; (b) middle part of the fusion line; (c) lower part of the fusion line; (d) upper part of the center of the weld bead; (e) middle part of the center of the weld bead; (f) lower part of the center of the weld bead

    Fig. 7. Microstructures of the hybrid welding joint. (a) Upper part of the fusion line; (b) middle part of the fusion line; (c) lower part of the fusion line; (d) upper part of the center of the weld bead; (e) middle part of the center of the weld bead; (f) lower part of the center of the weld bead

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    S-N curve of hybrid welded joints

    Fig. 8. S-N curve of hybrid welded joints

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    Cross-section diagrams of tensile joint fracture. (a) No.1 sample; (b) No.4 sample

    Fig. 9. Cross-section diagrams of tensile joint fracture. (a) No.1 sample; (b) No.4 sample

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    Microhardness distribution of welded joint formed by oscillating laser hybrid welding

    Fig. 10. Microhardness distribution of welded joint formed by oscillating laser hybrid welding

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    Microstructures of tensile fractures. (a) No.1 sample surface area near weld bead; (b) shear lip appearance on No.1 sample; (c) dimple appearance on No. 1 sample; (d) No.4 sample surface appearance near weld bead; (e) shear lip appearance on No.4 sample; (f) dimple appearance on No. 4 sample

    Fig. 11. Microstructures of tensile fractures. (a) No.1 sample surface area near weld bead; (b) shear lip appearance on No.1 sample; (c) dimple appearance on No. 1 sample; (d) No.4 sample surface appearance near weld bead; (e) shear lip appearance on No.4 sample; (f) dimple appearance on No. 4 sample

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    • Table 1. Chemical composition of 6A01 aluminum alloy and welding wire

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      Table 1. Chemical composition of 6A01 aluminum alloy and welding wire

      MaterialMass fraction /%
      SiFeCuMnMgCrZnTiAl
      6A01-T50.40--0.90≤0.35≤0.35≤0.500.40--0.80≤0.30≤0.25≤0.10Bal.
      ER53560.0570.120.011<0.134.90.0650.130.11Bal.

    • Table 2. Tensile properties of 6A01-T5 aluminum alloy profile at room temperature

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      Table 2. Tensile properties of 6A01-T5 aluminum alloy profile at room temperature

      Thickness t /mmYield strength Rp0.2 /MPaTensile strength Rm /MPaBreak elongation /%
      ≤6≥205≥2658

    • Table 3. Tensile test results of welded joint formed by oscillating laser hybrid welding

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      Table 3. Tensile test results of welded joint formed by oscillating laser hybrid welding

      GroupNumberTensile strength Rm /MPaBreak elongation /%Fracture locationFracture feature
      1#223.544.5Fusion lineDuctile
      12#218.884.5Fusion lineDuctile
      3#227.154.5Fusion lineDuctile
      4#203.644.5Fusion lineDuctile
      25#199.864.0Fusion lineDuctile
      6#202.994.0Fusion lineDuctile
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    Wen Peng, Li Zhongxiu, Zhang Song, Wang Chuanqiang, Mao Zhendong, Han Xiaohui, Wu Shikai. Investigation on Porosity, Microstructures and Performances of 6A01-T5 Aluminum Alloy Joint by Oscillating Fiber Laser-CMT Hybrid Welding[J]. Chinese Journal of Lasers, 2020, 47(8): 802003

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    Paper Information

    Category: laser manufacturing

    Received: Feb. 10, 2020

    Accepted: --

    Published Online: Aug. 17, 2020

    The Author Email: Shikai Wu (wushikai@emails.bjut.edu.cn)

    DOI:10.3788/CJL202047.0802003

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology