Study of the hot-wire TIG process with AISI-316L filler material, analysing the effect of magnetic arc blow on the dilution of the weld bead

Olivares, Erick Alejandro González; Díaz, Victor Manuel Vergara

doi:10.1080/09507116.2017.1347327

Cited by 21 publications

(11 citation statements)

References 10 publications

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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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“…The variation in the dimensions of the deposited structure has been measured for the samples prepared at optimized values of process parameters. This work extends the finding from previous studies [11,24] which focused on studying dimensional accuracy and surface appearance of the multilayer thin-walled structures.…”

Section: Introductionsupporting

confidence: 86%

“…Most of the researchers have claimed that the current, voltage, torch movement velocity and wire feeding speed are significantly affecting the output of the metal deposition process. Olivares and Díaz [11] carried out the comparison of TIG-based cold wire arc metal deposition process with the hot wire arc process. It was found that the deposition rate and speed of deposition were higher in hot wire arc method than the cold wire method.…”

Section: Introductionmentioning

confidence: 99%

Thin-walled metal deposition with GTAW welding-based additive manufacturing process

Gokhale

Kala

Sharma

2019

J Braz. Soc. Mech. Sci. Eng.

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The arc welding-based additive manufacturing technology is in its developing state. This technology can be utilized to produce free-form metallic structures for the aerospace and biomedical industry. The current article presents the design of semi-automatic gas tungsten arc welding-based additive manufacturing system for fabricating thin-walled metallic structures. This study aims to analyze the effect of process variables on the output parameters, such as deposition width and deposition height. The set of experiments were performed based on the design developed by Taguchi method. The experimental data have been analyzed to study the effect of the significant process parameters like current, torch speed, wire feeding speed and torch angle. The optimization of the significant process parameters has been done to ensure thin-walled deposition with minimum wall thickness and better geometric characteristics. Experimental results showed that as the angle of inclination increases the deposition width increases and the deposition height decreases. The surface appearance of the bead sample deposited at a different angle of inclination was investigated. The thickness of the wall obtained in this study was found to be the lowest wall thickness achieved by the arc welding-based additive manufacturing process deploying filler material of 1.2 mm diameter.

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“…At present, several welding techniques are applied to AM processes, such as gas tungsten arc welding (GTAW) [ 1 , 2 , 3 , 4 , 5 ], electron beam melting (EBM) [ 6 , 7 ], gas metal arc welding (GMAW), laser welding [ 8 , 9 , 10 , 11 ], and plasma welding (PAW) [ 12 ]. The principle of the hot-wire process is to heat the filler wire (or passing current), which makes the filler wire heat up by a separate power source until it is close to the melting point, and feed hot-wire to the weld pool.…”

Section: Introductionsmentioning

confidence: 99%

Experimental Investigation of Additive Manufacturing Using a Hot-Wire Plasma Welding Process on Titanium Parts

2021

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In this paper, we propose hot-wire plasma welding, a combination of the plasma welding (PAW) process and the hot-wire process in the additive manufacturing (AM) process. Generally, in plasma welding for AM processes, the deposit grain size increases, and the hardness decreases as the wall height increases. The coarse microstructure, along with the large grain size, corresponds to an increase in deposit temperature, which leads to poorer mechanical properties. At the same time, the hot-wire laser process seems to contain an overly high interstitial amount of oxygen and nitrogen. With an increasing emphasis on sustainability, the hot-wire plasma welding process offers significant advantages: deeper and narrow penetration than the cold-wire plasma welding, improved design flexibility, large deposition rates, and low dilution percentages. Thus, the hot-wire plasma welding process was investigated in this work. The wire used in the welding process was a titanium American Welding Society (AMS) 4951F (Grade 2) welding wire (diameter 1.6 mm), in which the welding was recorded in real time with a charge-coupled device camera (CCD camera). We studied three parameters of the hot-wire plasma welding process: (1) the welding speed, (2) wire current, and (3) wire feeding speed. The mechanical and physical properties (porosity, Vickers hardness, microstructure, and tensile strength) were examined. It was found that the number of layers, the length and width of the molten pool, and the width of the deposited bead increased, while the height of the layer increased, and the hot-wire current played an important role in the deposition. In addition, these results were benchmarked against specimens created by a hot-wire plasma welding/wire-based additive manufacturing process with an intention to develop the hot-wire PAW process as a potential alternative in the additive manufacturing industry.

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Study of the hot-wire TIG process with AISI-316L filler material, analysing the effect of magnetic arc blow on the dilution of the weld bead

Cited by 21 publications

References 10 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

Thin-walled metal deposition with GTAW welding-based additive manufacturing process

Experimental Investigation of Additive Manufacturing Using a Hot-Wire Plasma Welding Process on Titanium Parts

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