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

Shah, Priyanka; Agrawal, Chetan

doi:10.5781/jwj.2019.37.2.7

Cited by 10 publications

(5 citation statements)

References 44 publications

(55 reference statements)

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“…2.0 V, resulting in a hot wire power of about 300 W. It becomes clear that an increase of the wire feeding rate with constant TIG current leads to a decrease of the bead width with simultaneous increase of the bead height. These results correlate with existing knowledge of [39,56,57]. A possible explanation for this behaviour could be the higher cooling of the weld pool by the filler wire at high wire feeding rates.…”

Section: Experimental Investigations Using Cathode-focussed Gtaw Hot supporting

confidence: 89%

Development of a novel TIG hot-wire process for wire and arc additive manufacturing

et al. 2020

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The presented work deals with the development of a novel TIG hot-wire process for the additive manufacturing of metallic components, which, in contrast to previous arc processes, enables a significant increase in melting performance with simultaneously reduced heat input. This is achieved by means of an upstream resistance heating of the wire between two contact points within the hot wire feeding system. The torch, hot wire feeder and gas nozzle are designed in such a way that a constant bead geometry can be guaranteed regardless of the machining direction. On the one hand, this can improve the dimensional accuracy; on the other hand, an increase in productivity is achieved through a significant reduction of process times. Essential parts of the work include the simulation-supported development of the processing system, the design and implementation of an innovative process control system and the testing of the new technology.

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Section: Experimental Investigations Using Cathode-focussed Gtaw Hot supporting

confidence: 89%

Development of a novel TIG hot-wire process for wire and arc additive manufacturing

et al. 2020

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“…where n is the number of times an experimental combination has been repeated and Yi denotes the performance value of the i th experiment. The mean value of the S/N ratio has computed at each and every level of the four parameters [8]. The optimum level of related factor has chosen as the one with the higher is the best for mean (S/N) value among all three levels.…”

Section: Experiments Design Utilizing the Taguchi Methodsmentioning

confidence: 99%

Influence of Different Frequency Pulse on Weld Bead Phase Ratio in Gas Tungsten Arc Welding by Ferritic Stainless Steel AISI-409L

Venkatesh

Manivannan

Kaliappan³

et al. 2022

Journal of Nanomaterials

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The objective of the present experimental work is to obtain an appropriate welding parameter on pulsed current gas tungsten arc welding (GTAW) ferritic stainless steel AISI 409L with a thickness of 4.5 mm. Frequency affected penetration, and the ratio of bead width to penetration (aspect ratio) is the main objective of the research. A Taguchi L9 orthogonal array with three level four factors was chosen to execute the bead on plate welding. It leads to optimize the input process parameters on main effect plot via analysis of variance, and it has imposed to determine their contribution level of each parameter with respect to responses. Taguchi optimized conditions for butts weld with the pulsed TIG and its surface morphology, and mechanical characteristics of AISI 409L weld was investigated. A full penetration with an optimal aspect ratio was accomplished using high-frequency pulsing, according to the findings. The mechanical properties were characterized using Vickers microhardness and tensile tests on the base material and weld metals. Microstructural study revealed that these variables have a greater impact on the bead profile. Pulsed TIG showed maximum UTS of 445 MPa and a minimum of 385 MPa, with an average of three samples of 415 MPa. The weld metal in all of the zones had influenced superior tensile strength (UTS) as compared to base metal, according to the findings. The obtained strain percentage for both butt and TIG welds, however, was smaller than that of the parent metal. The formation of martensitic was attributed for the higher tensile strength with minimized ductility of the pulsed TIG welds. Furthermore, results on the hardness are in concurrence with the tensile experiments, as the zone for fusion has a higher hardness than the base metal. Corrosion behavior of the parent metal and welded specimen was analyzed using a potentio-dynamic polarization technique. The electrochemical behavior of base material and weld samples confirmed that the overall corrosion resistance is better in parent material than the other zones.

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“…The metallurgical and mechanical characterization of dissimilar joints between low carbon steel and stainless steel was made by laser autogenous welding. The results demonstrate that the affirmative difference in yield between the weld metal and the base materials assist the joint from being plastically deformed [7]. Another researcher presented in his paper that deeper qualitative analysis of the welding procedure's influences the fracture toughness of the High strength low alloy (HSLA) steel welded by manual metal arc (MMA) and metal active gas (MAG) process [8].…”

Section: Literature Reviewmentioning

confidence: 95%

Analysis of hardness for dissimilar stainless-steel joint by mathematical modelling

2023

IJATEE

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Gas tungsten arc welding (GTAW) is very popular globally as it is capable of doing similar and dissimilar material welding. Most commonly steel and aluminium of different grades are joined using this process. In this research work, two unalike grades of stainless steel i.e., 304 and 316 were welded together with different combination of parameters. An attempt was made to find out the effect on the surface hardness of the joint. The parameters under consideration were current, welding speed and torch angle, having two limits, maximum limit (+1) and lower limit (-1). A mathematical model was developed between input parameters and the responses such as hardness was analyzed by using the factorial approach. The result of the analysis shows that increase in current and welding speed decreases the hardness whereas an increase in torch angle increases the surface hardness. Hardness is maximum at the weld zone of two dissimilar metals and minimum at the heat affected zone.

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

Cited by 10 publications

References 44 publications

Development of a novel TIG hot-wire process for wire and arc additive manufacturing

Development of a novel TIG hot-wire process for wire and arc additive manufacturing

Influence of Different Frequency Pulse on Weld Bead Phase Ratio in Gas Tungsten Arc Welding by Ferritic Stainless Steel AISI-409L

Analysis of hardness for dissimilar stainless-steel joint by mathematical modelling

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