A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap

Buttazzoni, Michele; Zenz, Constantin; Otto, Andreas; Vázquez, Rodrigo Gómez; Liedl, Gerhard; Arias, J.L.

doi:10.3390/app11062549

Cited by 9 publications

(2 citation statements)

References 32 publications

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“…As Buttazzoni et al [ 43 ] point out, some material properties are not readily available or strongly dependent on certain factors. For example, the surface tension coefficient strongly depends on alloy composition or impurities within the material, and absorptance is a function of surface roughness and treatment, surface temperature, and laser wavelength.…”

Section: Numerical Modelmentioning

confidence: 99%

Numerical simulation of periodic surface structures created by direct laser interference patterning

et al. 2023

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Surface structuring using nano-second lasers can be used to enhance certain properties of a material or even to introduce new ones. One way to create these structures efficiently is direct laser interference patterning using different polarization vector orientations of the interfering beams. However, experimentally measuring the fabrication process of these structures is very challenging due to small length and time scales. Therefore, a numerical model is developed and presented for resolving the physical effects during formation the predicting the resolidified surface structures. This three-dimensional, compressible computational fluid dynamics model considers the gas, liquid, and solid material phase and includes various physical effects, such as heating due to the laser beam for both parallel and radial polarization vector orientations, melting, solidification, and evaporation, Marangoni convection, and volumetric expansion. The numerical results reveal a very good qualitatively and quantitatively agreement with experimental reference data. Resolidified surface structures match both in overall shape as well as crater diameter and height, respectively. Furthermore, this model gives valuable insight on different quantities during the formation of these surface structures, such as velocity and temperature. In future, this model can be used to predict surface structures based on various process input parameters.

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Section: Numerical Modelmentioning

confidence: 99%

Numerical simulation of periodic surface structures created by direct laser interference patterning

et al. 2023

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“…More comprehensive coupled fluid–thermal or fluid–thermal–mechanical models were used to analyze the processes of laser welding of aluminum alloys [ 72 , 73 ], titanium alloys [ 74 ], steels [ 75 , 76 , 77 , 78 ] or various dissimilar joints, especially a combination of different steel grades [ 79 , 80 ] or Al, Mg, Ti, Cu and Fe alloys [ 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Temperature Fields during Laser Welding–Brazing of Al/Ti Plates

Behúlová

Babalová

2023

Materials

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The formation of dissimilar weld joints, including Al/Ti joints, is an area of research supported by the need for weight reduction and corrosion resistance in automotive, aircraft, aeronautic, and other industries. Depending on the cooling rates and chemical composition, rapid solidification of Al/Ti alloys during laser welding can lead to the development of different metastable phases and the formation of brittle intermetallic compounds (IMCs). The effort to successfully join aluminum to titanium alloys is associated with demands to minimize the thickness of brittle IMC zones by selecting appropriate welding parameters or applying suitable filler materials. The paper is focused on the numerical simulation of the laser welding–brazing of 2.0 mm thick titanium Grade 2 and EN AW5083 aluminum alloy plates using 5087 aluminum filler wire. The developed simulation model was used to study the impact of laser welding–brazing parameters (laser power, welding speed, and laser beam offset) on the transient temperature fields and weld-pool characteristics. The results of numerical simulations were compared with temperatures measured during the laser welding–brazing of Al/Ti plates using a TruDisk 4002 disk laser, and macrostructural and microstructural analyses, and weld tensile strength measurements, were conducted. The ultimate tensile strength (UTS) of welded–brazed joints increases with an increase in the laser beam offset to the Al side and with an increase in welding speed. The highest UTS values at the level of 220 MPa and 245 MPa were measured for joints produced at a laser power of 1.8 kW along with a welding speed of 30 mm·s−1 and a laser beam offset of 300 μm and 460 μm, respectively. When increasing the laser power to 2 kW, the UTS decreased. The results exhibited that the tensile strength of Al/Ti welded–brazed joints was dependent, regardless of the welding parameters, on the amount of melted Ti Grade 2, which, during rapid solidification, determines the thickness and morphology of the IMC layer. A simple formula was proposed to predict the tensile strength of welded–brazed joints using the computed cross-sectional Ti weld metal area.

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Rapid formation of high aspect ratio through holes in thin glass substrates using an engineered, QCW laser approach

et al. 2022

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A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap

Cited by 9 publications

References 32 publications

Numerical simulation of periodic surface structures created by direct laser interference patterning

Numerical simulation of periodic surface structures created by direct laser interference patterning

Numerical Simulation of Temperature Fields during Laser Welding–Brazing of Al/Ti Plates

Rapid formation of high aspect ratio through holes in thin glass substrates using an engineered, QCW laser approach

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