Numerical study of alloying element distribution in CO2 laser–GMA hybrid welding

Cho, Won Ik; Na, Suck-Joo; Cho, Min-Hyun; Lee, Jong-Sub

doi:10.1016/j.commatsci.2010.06.025

Cited by 133 publications

(37 citation statements)

References 11 publications

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“…Authors proposed that the developed analytical and numerical model can be used for analyzing welding parameter such as welding speed and distance between arc and laser beam. Cho et al (2010) have developed a numerical model by considering the physical assumptions for predicting the molten metal flow and allowing element distribution at the time of CO 2 laser-GMA hybrid welding. The three-dimensional transient simulations was conducted on the basis of combining arc welding and laser welding model without interaction between the two heat sources and modified it to introduce the optical geometry of the laser system and conservation equation.…”

Section: Analytical Modelling For Laser Weldingmentioning

confidence: 99%

A Literature Review on CO2 Laser Welding

Bhadra

Biswas

Sankar

2015

Lasers Based Manufacturing

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Laser welding is a sophisticated, high accuracy and high speed welding process. Laser welding is a process of joining components where laser beam used as a heat source. In this present study a literature review on welding by laser as a heat source has been addressed. In the present review, emphasis has been given especially on the laser welding numerical and experimental temperature field analysis, thermo-mechanical analysis. The time frame of the review is 1992-2013.

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Section: Analytical Modelling For Laser Weldingmentioning

confidence: 99%

A Literature Review on CO2 Laser Welding

Bhadra

Biswas

Sankar

2015

Lasers Based Manufacturing

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“…Especially, the transient simulations with a volume of fluid (VOF) method described the more practical and meaningful weld pool can flow patterns [6][7][8]. Cao et al showed the droplet impingement on the weld pool surface of the gas metal arc welding (GMAW) process [6].…”

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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“…They used volume of fluid method to predict the keyhole dynamics and shape as an important physical phenomenon in hybrid welding. Won-Ik Cho et al [35] studied several important physical phenomena such as the keyhole and molten pool dynamics and alloying element distribution in CO 2 laser-GMA hybrid welding by using a commercial CFD code.…”

Section: Introductionmentioning

confidence: 99%

“…Since the problem is three-dimensional, an appropriate 3D electromagnetic model without assuming axisymmetric condition by solving four differential equations is used in this study. Since simulation of the keyhole dynamics and shape during laser and hybrid welding concerns very complicated physical phenomena and, as well, is very time-consuming as reported in previous literature studies [10,34,35,33], the keyhole dynamics are neglected to simplify the model and reduce the calculation time. Instead, the effect of keyhole on heat transfer is considered in a phenomenological way, i.e., a two-part volumetric laser heat source model is used to take into account the laser energy transferred into the workpiece by the keyhole.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of heat transfer and fluid flow in hybrid laser–TIG welding of aluminum alloy AA6082

Faraji

Goodarzi

Seyedein

et al. 2014

Int J Adv Manuf Technol

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This paper describes a three-dimensional numerical model based on finite volume method to simulate heat transfer and fluid flow in laser-tungsten inert gas (TIG) hybrid welding process. To simplify the model and reduce the calculation time, keyhole dynamics are not considered; instead, a new modified volumetric heat source model is presented for the laser source to take into account the effect of the keyhole on the heat transfer into the workpiece. Due to the presence of arc current, an appropriate electromagnetic model based on the Maxwell equations are also solved to calculate electromagnetic forces in the weld pool. The results of computer simulation, including temperature, current density, electromagnetic, and melted material velocity field, are presented here. Furthermore, several dimensionless numbers are employed to recognize the importance of fluid flow driving forces in the weld pool. It is deduced that the fluid flow has an important effect on the weld pool shape. It is also founded that among the driving forces, Marangoni force is dominant fluid force in the weld pool. Besides, calculated results of hybrid welding process are compared with those of TIG and laser welding processes. The weld pool depth is relatively the same, but the width of the weld pool is highly larger in hybrid welding than lone laser welding. Eventually, the presented model is validated by comparison between calculated and experimental weld pool shape. It is founded that there is a good agreement as the capability of this model can be proved.

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Numerical study of alloying element distribution in CO2 laser–GMA hybrid welding

Cited by 133 publications

References 11 publications

A Literature Review on CO2 Laser Welding

A Literature Review on CO2 Laser Welding

Molten pool behaviors for second pass V-groove GMAW

Numerical modeling of heat transfer and fluid flow in hybrid laser–TIG welding of aluminum alloy AA6082

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