K-GTAW process: A new welding technology combining quality and productivity

Port, P. Le; Laugier, Maxime; Scandella, Fabrice; Lawrjaniec, Didier; Boucher, Christian

doi:10.1080/09507110701510618

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…When the heat input is the same, more heat in the arc is conducted to the inside of the workpiece, which reduces the softening of the welded joint. Therefore, the use of K-TIG welding has the advantages of excellent welding joint quality, high production efficiency, and low cost [2]. At present, research on K-TIG welding is mainly concentrated on low thermal conductivity materials such as stainless steel, titanium and zirconium, and there are few studies on aluminum alloys with high thermal conductivity [3].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and performance test of aluminum alloy K-TIG welding joint

Gou¹,

Wang²

2022

AETR

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The K-TIG welding method was used to conduct welding experiments on 6001 aluminum alloy, and the microstructure and mechanical properties of the welded joints were studied by optical microscope, scanning electron microscope, universal testing machine, microhardness tester, etc. The results show that the center of the weld is equiaxed crystals and a small amount of dendrites, the near seam zone is columnar crystals formed by associated crystals, the fusion zone is equiaxed crystals of varying sizes, and there are grain boundary liquefaction and β″ phase in this zone. Agglomeration, growth and transformation, there are grain growth and precipitation zones in the heat-affected zone; the tensile fracture positions are all at the fusion line, and the fractures are ductile and brittle mixed quasi-cleavage fractures, with dimples, river patterns, and cleavage steps; welded joints The hardness of the fusion zone has a W-shaped distribution, and the hardness value of the fusion zone is lower due to over-aging softening.

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Section: Introductionmentioning

confidence: 99%

Microstructure and performance test of aluminum alloy K-TIG welding joint

Gou¹,

Wang²

2022

AETR

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Prediction of the keyhole TIG welding-induced distortions on Inconel 718 industrial gas turbine component by numerical-experimental approach

Battista,

Ambrogio,

Giorgini

et al. 2024

Int J Adv Manuf Technol

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Welding technologies represent a paramount joining process for ensuring the quality and reliability of critical industrial components; therefore, their innovation constitutes a driving force in realizing increasingly competitive products. A recently developed technology is the keyhole TIG welding, a new high energy–density alternative to the conventional TIG process. A key role in improving innovative manufacturing processes such as the keyhole TIG is covered by numerical simulation; indeed, it allows the development of a process digital twin able to support decisions and work as a predictive tool. Within this framework, the paper deals with the numerical-experimental investigation of the keyhole TIG technology, successfully employed on a simplified mock-up of an industrial gas turbine component consisting of two 6.5-mm-thick Inconel 718 rings. Numerical analysis aimed at predicting welding-induced distortions was performed employing two different computational approaches, namely the moving heat source and the simplified imposed thermal cycle methods. The numerical-experimental comparison of the results demonstrates an innovative approach in the field of the current keyhole TIG numerical simulation since, besides verification of numerical thermal analysis, further substantial validation of the post-weld distortion predictions is provided through comprehensive three-dimensional experimental data. Moreover, the comparative assessment of the two computational approaches and experimental evidence revealed that the imposed thermal cycle method implementation does not compromise the accuracy of welding distortion forecasting in industrial applications such as that investigated. Therefore, it can be regarded as a valuable tool for supporting the process engineer in designing the ideal set-up to comply with a variety of industrial requirements, among them strict design tolerances.

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Physical mechanism of polar zone phenomena in cross-coupling arc welding

Dong

Jiang

et al. 2020

Journal of Manufacturing Processes

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K-GTAW process: A new welding technology combining quality and productivity

Cited by 4 publications

References 2 publications

Microstructure and performance test of aluminum alloy K-TIG welding joint

Microstructure and performance test of aluminum alloy K-TIG welding joint

Prediction of the keyhole TIG welding-induced distortions on Inconel 718 industrial gas turbine component by numerical-experimental approach

Physical mechanism of polar zone phenomena in cross-coupling arc welding

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