Keyhole gas tungsten arc welding of commercially pure zirconium

Lathabai, Srinivasarao; Jarvis, B.L.; Barton, Killian

doi:10.1179/136217108x329296

Cited by 46 publications

(6 citation statements)

References 6 publications

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“…In order to calculate the heat input ratio (H R ), we used the measured current, voltage and feed rate of the feeder by connecting the welding waveform monitoring system to the TIG welding machine. The heat input ratio was calculated from the welding current, voltage, travel speed and deposition area (current and voltage were measured by waveform monitoring system, Monitech, Republic of Korea) as per the Equations (1) and (2). Figure 3 exhibits the macrostructure with the measuring procedure for the penetration area, bead width, bead height and average penetration.…”

Section: Methodsmentioning

confidence: 99%

“…TIG welding is an eco-friendly welding process with no spatter or fumes, and is a welding process capable of producing reliable welds [1]. However, its applications are restricted to limited industries due to its low productivity [2]. In order to improve the productivity of TIG welding, it is necessary to increase the current and increase the welding speed.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Park

Cheepu²,

Cho³

2020

Metals

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The welding market is changing globally, becoming eco-friendly, robotized and automated. The tungsten inert gas welding (TIG) process is indispensable in industries that require high-quality welds with the absence of spatter and fumes. However, the production rate of TIG welding is very low, which limits its many applications. The present study introduces a novel TIG welding method called super-TIG welding. Super-TIG welding is able to produce a high production rate of welds compared to other fusion welding methods. In super-TIG welding, the novel C-type filler is used, which is different from the conventional TIG welding of circular wire. The relations of the heat input ratio in super-TIG welding to weld pool length and weld bead geometry were measured using the Inconel 625 C-filler. Two types of deposition techniques were used for a bead-on-plate welds, such as stringer beads and oscillation beads. The weld pool and bead geometry measurements are found to be different between stringer beads and oscillation bead techniques. The length of the molten pool and bead size were higher for oscillation beads over the stringer beads. These changes were associated with the difference in heat transfer contact area and bead height.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Park

Cheepu²,

Cho³

2020

Metals

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“…To date, K-TIG has found applications in industries for joining medium thickness materials, say titanium [6], zirconium [7], stainless steel [8], low carbon steel [9] and dissimilar metal welding [10]. It was shown in these studies that K-TIG can complete the medium thickness weld in a single pass with a V-shaped morphology.…”

Section: Of 15mentioning

confidence: 99%

Effect of Heat Input on Weld Formation and Tensile Properties in Keyhole Mode TIG Welding Process

Fei

Pan

Cuiuri

et al. 2019

Metals

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Keyhole mode Tungsten Inert Gas (K-TIG) welding is a novel advanced deep penetration welding technology which provides an alternative to high power density welding in terms of achieving keyhole mode welding. In order to facilitate welding procedure optimisation in this newly developed welding technology, the relationship among welding parameters, weld formation and tensile properties during the K-TIG welding was investigated in detail. Results show that except for travel speed, the heat input level also plays an important role in forming undercut defect by changing the plasma jet trajectory inside keyhole channel, leading to the formation of hump in the weld centre and exacerbation of undercut formation. Both undercut defect and root side fusion boundary can act as a stress concentration point, which affects the fracture mode and tensile properties considerably. The research results provide a practical guidance of process parameter optimisation and quality assurance for the K-TIG welding process.

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“…KTIG torch has the advantages in aspects of simple structure and low cost. KTIG process can achieve keyhole mode welding in relatively low heat conductivity metals, for example, C-Mn steels by Lohse et al [15], CP zirconium by Lathabai et al [16], stainless steel by Feng et al [17], CP titanium by Lathabai et al [18]. Moreover, KTIG arc is wider than plasma arc and has a deeper penetration ability than TIG arc, the combination of a KTIG arc to a MIG arc should give new results.…”

Section: Introductionmentioning

confidence: 99%

KTIG–MIG hybrid arc welding process

Xiu,

Liu,

Zhao

2023

Science and Technology of Welding and Joining

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Metal-inert gas welding is an important welding process but the process instability easily induces spatter and undercut defects. To improve the welding process stability, a new hybrid arc welding process, named KTIG-MIG, was proposed in this paper. Arc characteristics were preliminarily studied. It is found that in KTIG-MIG hybrid welding, MIG arc is stable even it is shielded with pure argon gas; stable spray transfer is easily achieved in a much wider process window, especially the lowest voltage to achieve spray transfer is greatly reduced; KTIG arc voltage decreases than that in single KTIG arc, and MIG arc current is higher than the pre-set value. Cooling state of the KTIG tungsten plays a key role in slowing tungsten erosion.

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Keyhole gas tungsten arc welding of commercially pure zirconium

Cited by 46 publications

References 6 publications

Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Effect of Heat Input on Weld Formation and Tensile Properties in Keyhole Mode TIG Welding Process

KTIG–MIG hybrid arc welding process

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