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<p> In this paper, experiments were conducted on the double-sided welding of Ti-5Al-2V-2Fe titanium alloy plates at varying laser power settings. The effects of laser power on the formation of the welding joint and the distribution of elements were investigated. Furthermore, a three-dimensional hydrodynamic computational model has been developed to examine the impact of laser power on the formation of welding joints. As demonstrated by simulation results, the primary transverse flow direction of the molten pool is directed inward when laser power is at 1500 W, which increases the probability of porosity defects forming within the welding joint. Presented with EDS analysis, as the laser power increases, distinct β grain boundaries develop within the weld, showing a higher concentration of iron (Fe) in the grain boundary region compared to other areas. The findings suggest that as the laser power increases from 1500 to 1700 W while maintaining a constant welding speed of 20&#xa0;mm/s, the internal defects of the welding joint concomitantly reduce.</p>

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Experimental and numerical investigation of Ti-5Al-2V-2Fe low-cost titanium alloy butt joints through double-side laser welding

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Zheng-Tian Wang,
  • Pei-Hu Gao,
  • Bai-Yang Chen,
  • Bo Zhang,
  • Naumov Anton,
  • Zhong Yang,
  • Yong-Chun Guo,
  • Xu Yue,
  • Ji-jun Jiao

摘要

In this paper, experiments were conducted on the double-sided welding of Ti-5Al-2V-2Fe titanium alloy plates at varying laser power settings. The effects of laser power on the formation of the welding joint and the distribution of elements were investigated. Furthermore, a three-dimensional hydrodynamic computational model has been developed to examine the impact of laser power on the formation of welding joints. As demonstrated by simulation results, the primary transverse flow direction of the molten pool is directed inward when laser power is at 1500 W, which increases the probability of porosity defects forming within the welding joint. Presented with EDS analysis, as the laser power increases, distinct β grain boundaries develop within the weld, showing a higher concentration of iron (Fe) in the grain boundary region compared to other areas. The findings suggest that as the laser power increases from 1500 to 1700 W while maintaining a constant welding speed of 20 mm/s, the internal defects of the welding joint concomitantly reduce.