Numerical and experimental study of molten pool formation during continuous laser welding of AZ91 magnesium alloy

Abderrazak, Kamel; Bannour, Sana; Mhiri, Hatem; Lepalec, Georges; Autric, M.

doi:10.1016/j.commatsci.2008.06.002

Cited by 93 publications

(41 citation statements)

References 19 publications

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“…To the author's knowledge, no transient numerical analysis has been made for laser welding magnesium alloys; published investigations are limited to local problems like those proposed by Abderrazak et al (2008Abderrazak et al ( , 2009a. In their work, they studied local In the present study, the thermal history of butt-joint laser beam welding of thin AM60 magnesium alloys plates was simulated.…”

Section: Introductionmentioning

confidence: 97%

Finite element simulation of magnesium alloys laser beam welding

Belhadj¹,

Bessrour²,

Masse³

et al. 2010

Journal of Materials Processing Technology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. b s t r a c tIn this paper, a three-dimensional finite element model is developed to simulate thermal history magnesium-based alloys during laser beam welding. Space-time temperature distributions in weldments are predicted from the beginning of welding to the final cooling. The finite element calculations were performed using Cast3M code with which the heat equation is solved considering a non-linear transient behaviour. The applied loading is a moving heat source that depends on process parameters such as power density, laser beam dimensions and welding speed, and it is associated to moving boundary conditions. Experiments were carried out to determine temperature evolution during welding and to measure the laser weld width. By comparing the thermal model answers with the measurements, it is found that numerical simulations results are in a good agreement with the experimental data.

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Section: Introductionmentioning

confidence: 97%

Finite element simulation of magnesium alloys laser beam welding

Belhadj¹,

Bessrour²,

Masse³

et al. 2010

Journal of Materials Processing Technology

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“…They found correlations between various welding parameters without considering energy losses. Abderrazak et al [9] used also numerical model to analyze the formation of pools of molten metal during laser welding without considering energy losses.…”

Section: List Of Symbolsmentioning

confidence: 99%

Semi-analytic algorithms for the electrohydrodynamic flow equation

et al. 2012

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Laser welding is being used more frequently in industrial processes because of its advantages; therefore, energy loss in welding is an important issue during planning and operation. We calculated the energy losses expected during the laser welding of TA6V titanium alloy. We used the heat equation to describe the energy distribution of solid and liquid TA6V. The solid-to-liquid phase change was taken into account by comparing the accumulated energies and enthalpy of fusion. A numerical model was used to calculate the energy lost by convection and radiation. Finite difference calculations were performed using a FORTRAN-based computer program to solve the heat equation. The numerical results suggested that the appropriate laser welding velocity and power were in good agreement with the experimental data published elsewhere in the literature. The results showed the importance of the influence of the energy lost by radiation and convection in the welding area on welding energies and temperatures.Keywords Laser welding Á Heat equation Á Enthalpy of fusion Á Convection Á Thermal radiation Á Titanium alloyPower density at the center of the beam (W m

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“…Abderrazak et al [10] utilized their experimental and finite volume simulation results obtained from Mg alloy specimens to assert that a negative Marangoni effect, due to the absence of the surface active agent in the alloy composition, makes the melt-pool wider and shallower.…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

A Review on Melt‐Pool Characteristics in Laser Welding of Metals

Fotovvati

Wayne

Lewis

et al. 2018

Advances in Materials Science and Engineering

142

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Laser welding of metals involves with formation of a melt-pool and subsequent rapid solidification, resulting in alteration of properties and the microstructure of the welded metal. Understanding and predicting relationships between laser welding process parameters, such as laser speed and welding power, and melt-pool characteristics have been the subjects of many studies in literature because this knowledge is critical to controlling and improving laser welding. Recent advances in metal additive manufacturing processes have renewed interest in the melt-pool studies because in many of these processes, part fabrication involves small moving melt-pools. e present work is a critical review of the literature on experimental and modeling studies on laser welding, with the focus being on the influence of process parameters on geometry, thermodynamics, fluid dynamics, microstructure, and porosity characteristics of the melt-pool. ese data may inform future experimental laser welding studies and may be used for verification and validation of results obtained in future melt-pool modeling studies.

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Numerical and experimental study of molten pool formation during continuous laser welding of AZ91 magnesium alloy

Cited by 93 publications

References 19 publications

Finite element simulation of magnesium alloys laser beam welding

Finite element simulation of magnesium alloys laser beam welding

Semi-analytic algorithms for the electrohydrodynamic flow equation

A Review on Melt‐Pool Characteristics in Laser Welding of Metals

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