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Laser & Optoelectronics Progress, Volume. 56, Issue 3, 031403(2019)

Laser Spot Welding Characteristics of Dissimilar Metals: C4 Titanium/5052 Aluminum

Yiming Sun1, Zequn Zhang1, Caiwang Tan1,2、*, Xiaoye Zhao2, Bo Chen1, Xiaoguo Song1,2, and Jicai Feng2
Author Affiliations
  • 1 Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, Shangdong 264209, China
  • 2 State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Helongjiang 150001, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
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    References (16)
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    Figures & Tables(13)
    Schematic of laser spot welding process of Al/Ti

    Fig. 1. Schematic of laser spot welding process of Al/Ti

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    Specimen for tensile-shear test

    Fig. 2. Specimen for tensile-shear test

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    Cross sections of Ti /Al laser spot welding joints with differentdefocusing distance and power. (a) 0 mm, 1200 W; (b) 0 mm, 1500 W; (c) 0 mm, 2100 W; (d) +20 mm, 2300 W; (e) +20 mm, 2900 W; (f) +20 mm, 3300 W; (g) +40 mm, 3300 W; (h) +40 mm, 3700 W; (i) +40 mm, 3900 W; (j) +50 mm, 3700 W; (k) +50 mm,4700 W; (l) +50 mm, 4900 W

    Fig. 3. Cross sections of Ti /Al laser spot welding joints with differentdefocusing distance and power. (a) 0 mm, 1200 W; (b) 0 mm, 1500 W; (c) 0 mm, 2100 W; (d) +20 mm, 2300 W; (e) +20 mm, 2900 W; (f) +20 mm, 3300 W; (g) +40 mm, 3300 W; (h) +40 mm, 3700 W; (i) +40 mm, 3900 W; (j) +50 mm, 3700 W; (k) +50 mm,4700 W; (l) +50 mm, 4900 W

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    Interfacial morphologies of Ti/Al with different laser powers. (a) Interfacial macro-morphology with laser power of 3700 W; (b) zone B; (c) interfacial macro-morphology with laser power of 4700 W; (d) zone D; (e) zone E; (f) zone F

    Fig. 4. Interfacial morphologies of Ti/Al with different laser powers. (a) Interfacial macro-morphology with laser power of 3700 W; (b) zone B; (c) interfacial macro-morphology with laser power of 4700 W; (d) zone D; (e) zone E; (f) zone F

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    Relationship between laser power and tensile-shear force with various defocusing distance. (a) 0 mm; (b) +20 mm; (c) +40 mm; (d) +50 mm

    Fig. 5. Relationship between laser power and tensile-shear force with various defocusing distance. (a) 0 mm; (b) +20 mm; (c) +40 mm; (d) +50 mm

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    Schematic of microstructure evolution on the Ti/Al interface with different laser powers. (a) 3300 W; (b) 3700 W; (c) 4500 W; (d) 4700 W

    Fig. 6. Schematic of microstructure evolution on the Ti/Al interface with different laser powers. (a) 3300 W; (b) 3700 W; (c) 4500 W; (d) 4700 W

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    Fracture location and fracture surface with different laser powers. (a) 3700 W; (b) zone B; (c) zone C; (d) 4700 W; (e) zone E

    Fig. 7. Fracture location and fracture surface with different laser powers. (a) 3700 W; (b) zone B; (c) zone C; (d) 4700 W; (e) zone E

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    • Table 1. Chemical composition of 5052 aluminum alloy (mass fraction, %)

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      Table 1. Chemical composition of 5052 aluminum alloy (mass fraction, %)

      CompositionSiCuMgZnMnCrFeAl
      Content0.250.102.20~2.800.100.100.15-0.350.40Bal.

    • Table 2. Chemical composition of TC4 titanium alloy (mass fraction, %)

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      Table 2. Chemical composition of TC4 titanium alloy (mass fraction, %)

      CompositionAlVFeCNHOTiOthers
      Content5.50-6.803.50-4.500.300.100.050.010.20Bal.0.50

    • Table 3. Welding parameters adopted in the experiment

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      Table 3. Welding parameters adopted in the experiment

      Defocusingdistance /mmLaserpower /WWeldingtime /sFlow rate of shieldinggas /(L·min-1)Gas blowangle /(°)
      01200-230011545
      +202000-350011545
      +303100-370011545
      +403300-390011545
      +503300-490011545

    • Table 4. Joint appearances of Ti/Al laser spot welding joints with different welding parameters

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      Table 4. Joint appearances of Ti/Al laser spot welding joints with different welding parameters

    • Table 5. EDS analysis result of the point shown in Fig. 4

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      Table 5. EDS analysis result of the point shown in Fig. 4

      ZoneComposition /%
      AlMgTiVPossible phase
      P177.430.9620.870.74TiAl3
      P276.151.4421.980.43TiAl3
      P311.62-87.680.70α-Ti
      P465.470.9633.370.20TiAl2
      P576.841.4421.220.50TiAl3
      P697.862.14--Al

    • Table 6. EDS analysis results of the point shown in Fig. 7

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      Table 6. EDS analysis results of the point shown in Fig. 7

      ZoneComposition /%
      AlMgTiVPossible phase
      P196.523.48--Al
      P275.711.4222.150.73TiAl3
      P387.779.522.72-Al
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    Yiming Sun, Zequn Zhang, Caiwang Tan, Xiaoye Zhao, Bo Chen, Xiaoguo Song, Jicai Feng. Laser Spot Welding Characteristics of Dissimilar Metals: C4 Titanium/5052 Aluminum[J]. Laser & Optoelectronics Progress, 2019, 56(3): 031403

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Jul. 10, 2018

    Accepted: Aug. 22, 2018

    Published Online: Jul. 31, 2019

    The Author Email: Caiwang Tan (tancaiwang@163.com)

    DOI:10.3788/LOP56.031403

    Topics

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