Molten pool behavior in the tandem submerged arc welding process

Cho, Dae-Won; Kiran, Degala Venkata; Song, Woo-Hyun; Na, Suck-Joo

doi:10.1016/j.jmatprotec.2014.04.032

Cited by 37 publications

(33 citation statements)

References 15 publications

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“…2 and the experiment conditions for the 2nd pass GMAW, as written in Table 1. The mesh density used in the simulation was 0.25 mm/mesh to determine the molten pool behaviors because previous studies used at least four meshes for the droplet diameter [12,[14][15][16]. All the simulations were conducted by transient numerical analysis.…”

Section: Materials Shape and Mesh Sizementioning

confidence: 99%

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Molten pool behaviors for second pass V-groove GMAW

Cho

2015

International Journal of Heat and Mass Transfer

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Section: Materials Shape and Mesh Sizementioning

confidence: 99%

“…Kiran two-wire tandem SAW process with a physical relation between two arc plasmas. Moreover, Cho et al [14] applied these advanced arc interaction models to a VOF transient CFD and then described the dynamic molten pool behaviors of the two-wire tandem SAW.…”

Section: Introductionmentioning

confidence: 99%

Molten pool behaviors for second pass V-groove GMAW

Cho

2015

International Journal of Heat and Mass Transfer

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“…Kiran et al [22] developed a physical model to estimate the arc interaction in a SAW-T process. Cho et al [23] studied the individual effect of the leading and trailing arcs on the heat transfer and fluid flow in an SAW-T weld pool using CFD model. In summary, detailed studies on the weld quality produced by the SAW-T process under iso-heat input conditions are not available in the open literature.…”

Section: Introductionmentioning

confidence: 99%

“…The weld bead profiles, weld pool cooling time from 800 to 500°C (Δt 8/5 ), metallurgical phases, and the micro-hardness are analyzed. The cooling time in the weld pool is calculated using a three-dimensional heat transfer and fluid flow numerical model that was reported in our previous work [23]. Table 1 gives the welding conditions used to perform bead-ingroove experiments with plates of 780 mm × 360 mm× 17.5 mm (thickness) with a groove angle and a depth of 60°a nd 8.5 mm, respectively, using the SAW-T process.…”

Section: Introductionmentioning

confidence: 99%

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A study on the quality of two-wire tandem submerged arc welds under iso-heat input conditions

Kiran

Cho

Lee

et al. 2014

Int J Adv Manuf Technol

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The influence of the leading and trailing arc welding current on two-wire tandem submerged (SAW-T) arc weld quality was studied at a iso-heat input of 2.5 kJ/ mm. The weld quality includes weld bead dimensions, cooling time from 800 to 500°C in the weld pool, weld bead ferrite phase fraction, and micro-hardness. The cooling time was calculated from the temperature distribution predicted using the numerical model. For a constant heat input, the weld penetration significantly reduced with decreasing leading arc current at a low level of trailing arc current while the final weld penetration was less sensitive to the leading arc current at higher trailing arc current.

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Numerical investigation of droplet impact on the welding pool in gas metal arc welding

Mokrov

Lysnyi

Simon

et al. 2017

Materialwissenschaft Werkst

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A transient three-dimensional model that describes physical phenomena inside a welding pool during gas-metal arc welding process is presented. The model considers such phenomena as heat-mass transfer, electromagnetics, hydrodynamic processes and deformation of the weld pool free surface. The fluid flow in the weld pool is induced due to the presence of the mechanical impact of the droplets, thermo-capillary surface tension, thermal buoyancy and electromagnetic forces. The weld pool surface deformation is calculated by considering arc pressure and droplet impact force. A comparative analysis of the impact of the electric current of the welding arc and different force factors causing the motion of liquid metal in the weld pool on the shape of the welded seam was carried out and discussed. Keywords: Arc welding / numerical simulation / hydrodynamics / welded seam formation / droplet impact Es wird ein transientes, dreidimensionales Modell vorgestellt, das die physikalischen Phä nomene in einem Schmelzbad beim Metallschutzgasschweißen beschreibt. Das Modell berü cksichtigt solche Phä nomene wie Wä rme-und Massenü bertragung, elektromagnetische Phä nomene, hydrodynamische Prozesse und die Deformierung der freien Schmelzbadoberflä che. Die Strö mungen im Schmelzbad werden hervorgerufen durch den mechanischen Aufprall der Tropfen, die thermokapillare Oberflä chenspannung, den thermischen Auftrieb und elektromagnetische Krä fte. Bei der Berechnung der Deformation der Schmelzbadoberflä che werden der Lichtbogendruck und die Kraft der auftreffenden Tropfen berü cksichtigt. Eine vergleichende Analyse des Einflusses des elektrischen Stromes des Schweißlichtbogens und der verschiedenen Krä fte, die die Bewegung des flü ssigen Metalls im Schmelzbad verursachen, auf die Form der Schweißnaht wurde durchgefü hrt und diskutiert. Schlü sselwö rter: Lichtbogenschweißen / numerische Simulation / Strö mungen / Schweißnahtbildung / Tropfenwirkung

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Molten pool behavior in the tandem submerged arc welding process

Cited by 37 publications

References 15 publications

Molten pool behaviors for second pass V-groove GMAW

Molten pool behaviors for second pass V-groove GMAW

A study on the quality of two-wire tandem submerged arc welds under iso-heat input conditions

Numerical investigation of droplet impact on the welding pool in gas metal arc welding

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