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<p>This paper primarily investigates the ultrasonic-assisted laser–MIG (metal inert gas welding) hybrid welding technology for TC4 titanium alloy, optimizing welding parameters by numerical simulation methods. An orthogonal experimental design was employed to optimize welding factors such as ultrasonic power, laser power, welding current, and welding speed. The results indicate that these parameters have a significant impact on molten pool morphology, residual stress distribution, and weld deformation. The study also shows that ultrasonic vibration helps to improve the fluidity of metal within the molten pool, thereby reducing welding defects; besides, it may also induce the instability of the molten pool. Finally, it is suggested that optimizing welding parameters can further reduce the residual stress peak value generated during the welding process and enhance the welding quality. This research provides a scientific basis for the application of TC4 titanium alloy in ultrasonic-assisted laser–MIG hybrid welding and promotes the application of this technology in high-tech fields.</p>

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Research on Numerical Simulation of Ultrasonic-Assisted Laser–MIG Hybrid Welding of TC4 Titanium Alloy

  • 期刊论文

  • 发表日期：

    2025年9月22日

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  • Yongxin Lu,
  • Pengjun Wen,
  • Dafeng Wang,
  • Xiaoyong Zhang,
  • Shiqing Wang,
  • Wei Qiang

摘要

This paper primarily investigates the ultrasonic-assisted laser–MIG (metal inert gas welding) hybrid welding technology for TC4 titanium alloy, optimizing welding parameters by numerical simulation methods. An orthogonal experimental design was employed to optimize welding factors such as ultrasonic power, laser power, welding current, and welding speed. The results indicate that these parameters have a significant impact on molten pool morphology, residual stress distribution, and weld deformation. The study also shows that ultrasonic vibration helps to improve the fluidity of metal within the molten pool, thereby reducing welding defects; besides, it may also induce the instability of the molten pool. Finally, it is suggested that optimizing welding parameters can further reduce the residual stress peak value generated during the welding process and enhance the welding quality. This research provides a scientific basis for the application of TC4 titanium alloy in ultrasonic-assisted laser–MIG hybrid welding and promotes the application of this technology in high-tech fields.