Arc shape and microstructural analysis of TIG welding with an alternating cusp-shaped magnetic field

Wu, Hong; Chang, Yunlong; Guan, Ziqi; Бабкин, Александр; Lee, Bo-Young

doi:10.1016/j.jmatprotec.2020.116912

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…FSW/FSAM can be suitable for joining of stainless steel [33], magnesium alloy [41], aluminum alloy [27], and even dissimilar metals [42]. Although TIG can be available for the joining of these metals including stainless steel [43], magnesium alloy [44], aluminum alloy [45], and even dissimilar metals [46], FSAM reveals advantages like lower welding distortion [47] and less cracks/porosity caused by fusion welding [48]. This is the reason for the selection of TIG for comparison.…”

Section: Experiments and Numerical Model 21 Numerical Modelmentioning

confidence: 99%

Band gap characteristics of friction stir additive manufactured phononic crystals

Tan¹,

Zhang²

2022

Phys. Scr.

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Additive Manufacturing (AM) is widely used to fabricate phononic crystals (PnCs) in recent years. Friction Stir Additive Manufacturing (FSAM) is a new-type solid state fabrication technology which is fusion free with low distortions. FSAM was selected to fabricate the designed PnCs. The manufactured specimen was distorted due to the temperature rise in the manufacturing process and the band gaps (BGs) were changed with the distortions. Results indicate that the band gap of the PnCs moves to be in higher frequency domain due to the residual distortions of the manufactured PnCs. The residual distortion of FSAM PnCs is 2.77 times smaller in comparison with the Tungsten Inert Gas (TIG) welding. So, the differences of the band gap between the designed PnCs and the FSAM specimen are only in the range of 0.15%- 0.55% due to the lower temperature rise in FSAM. The further analysis shows that the change of the BGs is caused by the growth of the inertia moment for the FSAM PnCs. With the increase of the rotating speed in FSAM, the residual distortion of the FSAM PnCs is increased due to the increase of the welding temperature. This can lead to the increase of the inertia moment, which is the key reason for the increase of the BG characteristics of the FSAM PnCs.

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Section: Experiments and Numerical Model 21 Numerical Modelmentioning

confidence: 99%

Band gap characteristics of friction stir additive manufactured phononic crystals

Tan¹,

Zhang²

2022

Phys. Scr.

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“…The cathode (i.e., tungsten electrode) will be eroded at high temperature due to the arc heat, the bombardment of high-energy positive ions, and its own resistance heat. 4 The cathode erosion, which alters the end shape, will significantly affect the arc shape and final joint quality, 5,6 causing low welding productivity and high costs. However, the replacement of the tungsten electrode is generally based on the experience of workers to avoid the unqualified joints caused by cathode erosion, which lacks accurate data support.…”

Section: Introductionmentioning

confidence: 99%

Evolution rules for cathode erosion and corresponding arc behaviour in tungsten inert gas welding

Qu,

Qin,

Wang

et al. 2024

Science and Technology of Welding and Joining

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Cathode erosion is a serious problem in long hours of Tungsten Inert Gas (TIG) welding. The evolution of electrode end shape and corresponding arc behaviour was studied at different welding currents and cathode parameters. The results illustrate that slow erosion, shedding, and expansion are three typical erosion modes. Slow erosion is an inevitable mode, causing the arc root width ( Ra) and arc diameter ( Rb) to slowly increase by 2.1% and 2.6%, respectively. With the increasing welding current or the decreasing cone angle and diameter, Ra and Rb are increased in shedding mode by 6.3% and 1.0%, respectively. Expansion appears when the electrode end has a truncated cone shape, causing gradual decrease of 5.7% and 2.3% in Ra and Rb, respectively.

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“…In particular, M-TIG has been widely used in many applications in the welding field due to the variety of applied external magnetic fields. For example, Nomura et al [3][4][5] used a sharp magnetic field to transform the arc cross-section from circular to elliptical, resulting in a significant increase in the weld penetration. Wang L et al [6][7][8] applied transverse and longitudinal magnetic fields around the TIG arc, and utilized the deflection and oscillation of the arc to improve the welding quality of high-speed welding and narrow gap welding.…”

Section: Introductionmentioning

confidence: 99%

Influence of magnetic head structure and parameters on the axial magnetic field hybrid TIG welding

Wu,

Chang,

Chang

2024

Weld World

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Arc shape and microstructural analysis of TIG welding with an alternating cusp-shaped magnetic field

Cited by 12 publications

References 10 publications

Band gap characteristics of friction stir additive manufactured phononic crystals

Band gap characteristics of friction stir additive manufactured phononic crystals

Evolution rules for cathode erosion and corresponding arc behaviour in tungsten inert gas welding

Influence of magnetic head structure and parameters on the axial magnetic field hybrid TIG welding

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