Unveiling arc deflection instability in narrow gap laser-arc hybrid welding of thick Ti-6Al-4V plate

Liu, Junfeng; Yang, Tao; Zhuang, Yuan; Huang, Minxuan; Su, Xijian; Dong, Shijiang

doi:10.1016/j.jmapro.2023.09.013

Cited by 4 publications

(1 citation statement)

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“…Therefore, with the D 1 fixed at 2 mm, the droplet transfer behaviors were observed at different D 2 under the experimental parameters in Table 4, and the welding stability and weld formations were analyzed. In Figure 6e, the droplet experiences the combined effects of gravity (Fg), plasma flow force (Fp), droplet surface tension (Fs), electromagnetic force (Fem), and plasma recoil force (Fr) from formation to drop [24]. When D 2 was 0 mm, the filler wire was aligned with the tungsten electrode, causing the arc to deflect.…”

Section: The Influence Of Process Parametersmentioning

confidence: 99%

A Laser-Induced TIG Arc Narrow-Gap Welding Technique for TC4 Titanium Alloy Thick Plates Based on the Spatial Position Control of Laser, Arc and Filler Wire

Song,

Xu,

Lang

et al. 2024

Metals

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In this paper, a novel laser-induced TIG arc narrow-gap welding technology is proposed for thick plates of TC4 titanium alloy. The feasibility of achieving high-performance welding joints is investigated by adjusting the spatial deviation position of the laser, arc, and filler wire. The results exhibited remarkable capabilities. By augmenting the laser-arc malposition, a stable deflection of the arc can be achieved, resulting in enhanced heat input to the sidewall adjacent to the laser side and improved fusion capability. Moreover, an inclined weld can be obtained through increased malposition between the filler wire and arc, which helps to improve interlayer fusion and suppress porosity defects. This method, involving alternating bilateral offsets between passes, successfully achieved narrow-gap welding of 24 mm-thick TC4 titanium alloy with an average tensile strength of 880.68 MPa (equivalent to 95.05% of base material strength). Therefore, this technology exhibits promising potential as an automated welding technique for achieving high-quality narrow-gap welding in titanium alloys.

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Section: The Influence Of Process Parametersmentioning

confidence: 99%