Estimation of heat source model parameters for twin-wire submerged arc welding

Sharma, Abhay; Chaudhary, Ajay Kumar; Arora, Navneet; Mishra, B.K.

doi:10.1007/s00170-009-2046-3

Cited by 51 publications

(20 citation statements)

References 13 publications

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“…where i = 1, 2 express numbers of two sources, Q i is heat input, a if , a ir , b i , c i are relevant with electric current, voltage and welding velocity, these parameters are different and independent, which can be determined by depth and width of the molten pool [10]. The characteristic parameters only determine the Estimation of Cooling Rate from 800 °C to 500 °C in the Welding of Intermediate Thickness Plates Based on FEM Simulation 261 heat shape rather than heating power.…”

Section: Model Of Heat Sourcementioning

confidence: 99%

Estimation of Cooling Rate from 800 °C to 500 °C in the Welding of Intermediate Thickness Plates Based on FEM Simulation

Liu¹,

Qiu²,

Dong³

2017

JMSE-B

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FEM (finite element method) simulation for estimating the cooling rate from 800 °C to 500 °C in welding cycle of plates with intermediate thickness is presented. Moving double ellipsoid heat sources were applied to simulate the thermal field of welding process, and the cooling rates were investigated with different welding parameters including plate thickness, heat input and preheating temperature according to the analysis of heat transfer characteristics. The critical condition for defining intermediate thickness of plates was determined through comparison between FEM results and calculation results from conventional analytical solutions of Rosenthal et al. and prediction equations of cooling rate in welding of plates with intermediate thickness were established based on regression analysis of FEM results using polynomial method. The feasible range of the equations with preheating temperature was discussed. The welding experiments with the same parameters were carried out to verify the effectiveness of the prediction equations. The compared results of thermal cycles and microstructures between experiment and FEM showed that a good agreement was obtained.

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Section: Model Of Heat Sourcementioning

confidence: 99%

Estimation of Cooling Rate from 800 °C to 500 °C in the Welding of Intermediate Thickness Plates Based on FEM Simulation

Liu¹,

Qiu²,

Dong³

2017

JMSE-B

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“…Several numerical [5][6][7][8][9][10][11][12][13][14][15][16][17] and experimental investigations [1,2,[18][19][20][21][22] of arc welding have been reported by various researchers. Rosenthal [23] first proposed a mathematical model of a moving heat source under the assumption of quasi-steady state; however, as many researchers have discussed, Rosenthal's analysis (that assumes either a point, line, or plane source of heat) has major error for temperatures in or near the fusion and heat-affected zones [24].…”

Section: Introductionmentioning

confidence: 99%

“…A decoupled thermalmechanical analysis approach was developed where the welding-induced residual stresses were calculated based on a 2D FE model and then applied to a 3D FE model for structural analysis. Sharma et al [16] suggested and validated a volumetric heat source model of twin-wire SAW by using different electrode diameters and polarities. It has been found that the heat source model parameters for twin-wire welding are substantially different from the single-wire welding.…”

Section: Introductionmentioning

confidence: 99%

Investigation of temperature and residual stresses field of submerged arc welding by finite element method and experiments

Nezamdost

Esfahani

Hashemi

et al. 2016

Int J Adv Manuf Technol

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This article reports on a numerical and experimental investigation to understand and improve computer methods in application of the Goldak model for predicting thermal distribution in submerged arc welding (SAW) of APIX65 pipeline steel. Accurate prediction of the thermal cycle and residual stresses will enable control of the fusion zone geometry, microstructure, and mechanical properties of the SAW joint. In this study, a new Goldak heat source distribution model for SAW is presented first. Both 2D and 3D finite element models are developed using the solution of heat transfer equations in ABAQUS Standard implicit. The obtained results proved that the 2D axi-symmetric model can be effectively employed to simulate the thermal cycles and the welding residual stresses for the test steel. As compared to the 3D analysis, the 2D model significantly reduced the time and cost of the FE computation. The numerical accuracy of the predicted fusion zone geometry is compared to the experimentally obtained values for bead-on-plate welds. The predictions given by the present model were found to be in good agreement with experimental measurements.

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“…The Goldak heat source parameters were determined when the experimental and the numerical microsection of the weld and the weld thermal cycles show a sufficient agreement. The expression of the double ellipsoid heat source [4,5] is as follows: 2 2 2 2 2 2 1 1 2 2 2 2 2 2 2 2 6 3 3 3 3 6 3 3 3 …”

Section: Numerical Simulationmentioning

confidence: 99%

Numerical simulation of temperature field in multiple-wire submerged arc welding of X80 pipeline steel

Yan

Jiang

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Three dimensional (3D) finite element (FE) simulation was implemented to predict the temperature distribution during multiple-wire submerged arc welding (SAW) throughout the welded joint of X80 pipeline steel. A moving heat source model based on Goldak's double-ellipsoid heat flux distribution was applied in the simulation to capture the heating effect of the welding arc. Effects of welding speed, wire spacing and leading wire current on temperature distribution were further investigated. The simulation results show that both welding speed and wire spacing have significant effects on welding temperature distribution in X80 pipeline steel welded joint. IntroductionMultiple-wire submerged arc welding is widely employed in the construction of ships, pipeline systems, and pressure vessels due to its advantages of deep penetration, high deposition rate, smooth bead appearance, and elevated productivity. Triple-wire SAW has been increasingly used in construction of large diameter pipes, while welded pipes fabricated using four-wire SAW has been employed in several West-East Gas Pipeline Projects. Four-wire tandem SAW process provides simultaneous deposition from four electrodes with one electrode leading the others in the direction of welding [1][2][3]. The leading, middle and trailing electrodes in four-wire tandem SAW are usually connected respectively to a DC and three AC power supplies so that a large number of welding conditions can be satisfied. These adjustable welding conditions include the leading wire current, the current pulses and the corresponding pulse durations of the trailing wires, the distance between individual wires, the wire diameter, the arc voltage and welding speed. High current and low voltage of the leading wire are employed to obtain high penetration, while low welding current and high voltage of the trailing wire are employed to obtain good appearance. In spite of the many advantages, the large amount of welding parameters results in increasing difficulty in controlling the welding process and the integrity of the welded joint. The temperature distribution during multiple-wire submerged arc welding determines the microstructure, hardness and mechanical properties. However, the typical nature of the multiple-wire SAW makes it difficult to measure the thermal cycles and corresponding peak temperatures in the weld experimentally. Thus, an alternative way to obtain thermal cycles in multiple-wire SAW process based on numerical modeling of the heat transfer was developed in this investigation. Welding temperature field under different welding conditions was

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Estimation of heat source model parameters for twin-wire submerged arc welding

Cited by 51 publications

References 13 publications

Estimation of Cooling Rate from 800 °C to 500 °C in the Welding of Intermediate Thickness Plates Based on FEM Simulation

Estimation of Cooling Rate from 800 °C to 500 °C in the Welding of Intermediate Thickness Plates Based on FEM Simulation

Investigation of temperature and residual stresses field of submerged arc welding by finite element method and experiments

Numerical simulation of temperature field in multiple-wire submerged arc welding of X80 pipeline steel

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