High-performance GMAW process for deep penetration applications

Dutra, Jair Carlos; Silva, Régis Henrique Gonçalves e; Riffel, Kauê Correa; Marques, Cleber

doi:10.1007/s40194-020-00889-0

Cited by 12 publications

(6 citation statements)

References 6 publications

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“…However, it is obvious that with increasing ambient pressure the fluctuations in the welding current become more pronounced. This effect can be explained with the buried arc which is occurring in accordance with higher energy densities [7] (Fig. 5).…”

Section: Results For Aluminiummentioning

confidence: 71%

“…This behaviour is supported by the literature. Especially Dutra et al [7] proposed and showed a significant influence of the energy density on the welding depth. The presented results show a buried arc for higher ambient pressures in the high-speed camera observation and the voltage and current measurements.…”

Section: Discussionmentioning

confidence: 99%

“…Detailed studies on the positive influence of a hyperbaric process environment on the welding process are rare. The possible usage of a higher energy density to obtain a larger penetration depth is shown in [7]. This results in a higher process efficiency and a change in the weld metal microstructure due to the faster cooling rates.…”

Section: Introductionmentioning

confidence: 99%

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Beneficial use of hyperbaric process conditions for welding of aluminium and copper alloys

et al. 2021

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The joining of components with as few weld layers as possible is an important aspect of weld seam design due to the resulting reduced manufacturing effort and reduced influence of thermal cycles on the base material as well as reduced distortion. For materials with good thermal conductivity, this is not easily possible. The energy density of the arc has been found to be the core parameter for determining the penetration. In the present work, it is shown how the use of a hyperbaric process environment (2 to 16 bar) allows an increase of the energy density of the arc and thus an increase of the penetration depth for selected aluminium and copper alloys. Furthermore, the effects of this novel approach on weld metal metallurgy are presented. It is shown that the penetration depth can be doubled by increasing the ambient pressure. Furthermore, a statistical model for the prediction of the penetration depth depending on the welding parameters will be presented.

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Section: Results For Aluminiummentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

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Beneficial use of hyperbaric process conditions for welding of aluminium and copper alloys

et al. 2021

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“…8 . Furthermore, the observation of the welding processes, the high-energy welding processes with an increased ambient pressure and the finger-like shape in the cross-sections show a buried arc, as Dutra et al 22 described in their work. This buried arc has also been seen by visual observation.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 66%

“…An increased energy density leads to a deeper penetration of the weld seam, as Dutra showed for a modified welding process 22 . Bunaziv et al showed a similar effect for welding with the CMT mode at elevated ambient pressures 5 .…”

Section: Introductionmentioning

confidence: 72%

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Treutler

Brechelt

Wiche

et al. 2022

Sci Rep

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Hyperbaric welding is used for different steels in many underwater applications as a repair welding process. A difference between wet and dry welding processes can be made. Due to the increased ambient pressure, these processes have special features inherent in the process that influence the cooling and penetration behaviour. The positive use of these effects outside underwater applications is currently rarely addressed in science and application. The presented work establishes these advantages on the basis of a higher strength structural steel and characterizes the effects on the microstructure of a joined S700MC steel and on the mechanical properties of the joint. It will be shown that a hyperbaric environment can be used to orient the weld more towards the depth of the sheet. Furthermore, it will be shown that this change leads to modified cooling, which in itself influences the mechanical properties of the weld seam.

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Research progress of low spatter CO2 welding technology

Miao

Dong

et al. 2022

Int J Adv Manuf Technol

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High-performance GMAW process for deep penetration applications

Cited by 12 publications

References 6 publications

Beneficial use of hyperbaric process conditions for welding of aluminium and copper alloys

Beneficial use of hyperbaric process conditions for welding of aluminium and copper alloys

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Research progress of low spatter CO2 welding technology

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