Numerical Simulation of Metal Vapour Behavior in Double Electrodes TIG Welding

Wang, X.; Luo, Yi; Wu, Guangfeng; Chi, Luxin; Fan, Ding

doi:10.1007/s11090-018-9904-4

Cited by 23 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A numerical model was developed to investigate the behavior of arc and weld pool considering metal vapor concentration in T-TIG welding process 14) .…”

mentioning

confidence: 99%

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Shah

Agrawal

2019

Journal of Welding and Joining

View full text Add to dashboard Cite

Tungsten Inert Gas (TIG) welding process is used in the industry due to its positional suitability, good control over metallurgical and mechanical properties and weld integrity. It makes this process more suitable to weld the root pass in the piping industries. However, there is a remarkable limitation to increase the welding current beyond a certain limit in the conventional TIG welding process due to limited current carrying capacity of a single electrode and higher arc pressure. This limits its productivity. To combat it, Twin TIG (T-TIG) welding process is introduced where the two tungsten electrodes are present in one torch. The two separate and synchronized power sources are connected to the two electrodes. To increase the metal deposition rate, the hot filler wire is used because it reduces the requirement of heat from arc plasma. There is another advancement in the TIG welding process which incorporates pulsed power source assisted welding process to control weld bead geometry, microstructure and to weld dissimilar material. This paper presents the effect of parameters of T-TIG, hot wire, and pulsed current welding processes when performed separately. A novel welding set up is proposed to weld dissimilar material with weld integrity. This paper suggests that when these three techniques are used simultaneously by meticulous studies of their process parameters with automation, an outperformed technique can be evolved which multiples the individual advantages of the three processes.

show abstract

“…A numerical model was developed to investigate the behavior of arc and weld pool considering metal vapor concentration in T-TIG welding process 14) .…”

mentioning

confidence: 99%

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Shah

Agrawal

2019

Journal of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…When the transverse magnetic field is applied, the arc will deflect to the side under the action of electromagnetic force. During the twin/tandem arc welding process, the two arcs are coupled, and the arc volume expands, resulting in decreasing arc current density, as reported by [22][23][24].…”

Section: Introductionmentioning

confidence: 87%

“…It has a particular influence on the axial shrinkage, and the length of the arc, but the arc shape is still a bell shape. It is widely known that the arc shape is greatly affected by external factors, which mainly include the electrode size and shape, the type of shielding gas, and the applied electric/magnetic field [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Christopher et al [8] found that the smaller the tip truncation angle of the electrode, the higher the arc contraction degree, and the higher the arc centre temperature and current density.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Influence of the as-Deposited Wall Thickness on Arc Shape and Stability during Wire Arc Additive Manufacturing

Zhou

Zhang

Peng

et al. 2022

Metals

View full text Add to dashboard Cite

The single-pass multi-layer depositing strategy is usually used to fabricate thin-wall structures with wire and arc additive manufacturing (WAAM) technology. Various deposited wall thicknesses often lead to a change in arc shrinkage in the wall thickness direction, which affects the arc shape and stability, and even the microstructure and properties. To systematically study the effect of wall thickness (δ) on arc shape and stability, 3D numerical models were established, with wall thickness varying from 1 to 14 mm during the WAAM process. The characteristics of the arc shape, temperature field, velocity field, current density, and the electromagnetic force were investigated. When δ is smaller than the arc diameter (Φ), the thinner wall will result in a longer arc along the deposition direction. When δ is greater than the Φ, the arc shape tends to be a bell shape. When δ < Φ, the peak temperature in the arc centre, the peak current density, and the electromagnetic intensity along the welding direction decreased with the increase in the wall thickness. However, the opposite observations were found when δ < Φ. The simulation results are consistent with the actual arc shape collected and showed that when δ is slightly less than Φ, the forming quality of the deposited wall is the best. The research in this paper can fill the research gap and provide a theoretical basis for the matching selection of process parameters and wall thickness in WAAM applications.

show abstract

“…Meng et al [15] looked into the molten pool dynamics of the GATW and discovered the impact of gravity, Marangoni shear stress, surface tension, and inertia force on the humping formation. A unified 3D model of double-electrode TIG welding was created by Wang et al [16][17][18] to study the dynamic behavior of the molten pool and arc plasma.…”

Section: Introductionmentioning

confidence: 99%

Mechanism study of flow characteristics of molten pool and keyhole dynamic behavior of K-TIG welding

Cui,

Dai,

et al. 2023

Preprint

View full text Add to dashboard Cite

The stability and reliability of K-TIG welding depend on the flow characteristics of molten pool and the dynamic behavior of keyhole. In order to explain the variation mechanism between the flow behavior of liquid metal and the dynamic behavior of the keyhole while taking electromagnetic force, surface tension, buoyancy, etc. into consideration, this work developed a mathematical model of K-TIG welding. The simulation results of the keyhole exit were compared with images of the keyhole exit taken by the high-speed CCD camera and the keyhole exit characteristics parameters, and the deviation of keyhole outlet parameters XL and YL under each group of process parameters were less than 0.2 mm, and the deviation of SA was less than 0.4 mm2. The flow trend of molten metal in keyhole formation was mainly from the center of keyhole to the surrounding of the keyhole under the consideration of electromagnetic force, surface tension, etc. The trend of melt pool distribution decreased along the perimeter of the keyhole and the thickness of the workpiece, and the overall flow field was stepped. Moreover, the keyhole exit was in a dynamic equilibrium state under the action of gravity, surface tension and arc pressure. The reduction in welding speed accelerated the formation of the keyhole exit and increased the maximum flow velocity of molten metal under the influence of Marangoni forces.

show abstract

Numerical Simulation of Metal Vapour Behavior in Double Electrodes TIG Welding

Cited by 23 publications

References 30 publications

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Simulation of the Influence of the as-Deposited Wall Thickness on Arc Shape and Stability during Wire Arc Additive Manufacturing

Mechanism study of flow characteristics of molten pool and keyhole dynamic behavior of K-TIG welding

Contact Info

Product

Resources

About