Multi-physics multi-scale simulation of the solidification process in the molten pool during laser welding of aluminum alloys

Jiang, Ping; Gao, Song; Song, Geng; Han, Chao; Mi, Gaoyang

doi:10.1016/j.ijheatmasstransfer.2020.120316

Cited by 42 publications

(6 citation statements)

References 31 publications

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“…Laser welding, with advantages such as low heat input, fast welding speed, and minimal post-weld deformation, has been widely applied. In recent years, research has shown that the beam oscillation generated by mirror scanning systems can increase the tolerance of assembly errors, reduce welding cracks 4,5 , and improve the convection of the molten pool, thereby enhancing the formation of laser-welded seams in medium-thick plates, refining weld grain structures, and reducing porosity in aluminum alloy welding [6][7][8][9][10] . Currently, laser oscillating scanning welding (LOSW) is mostly used for aluminum alloy welding, with limited applications in stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Research on weld formation of SUS 304 stainless steel by laser oscillating scanning welding

Tang,

Aday

2024

Third International Conference on Advanced Manufacturing Technology and Electronic Information (AMTEI 2023)

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In order to investigate the underlying mechanism of how process parameters in galvanometer-scanned laser welding affect weld formation, the galvanometer-scanned laser welding technology was applied to SUS304 stainless steel under different oscillating frequency and amplitude. The finite element analysis was used to predict the effect of oscillation parameters on the temperature field of SUS304 stainless steel weld joint. The results indicate that compared to conventional laser welding, laser oscillating scanning welding significantly improved the quality of weld formation and suppressed defects such as burn-through, undercut and overlap. With the increase of scanning amplitude or scanning frequency, the weld forming quality is improved. However, with the further increase of scanning amplitude or frequency, undercut defects will occur on the front side of the weld, and spatter/overlap defects will occur on the back side of the weld. This is because laser oscillating scanning welding changes the energy deposition path; The simulated temperature field is in good agreement with the actual weld geometry. Compared with conventional laser welding, laser oscillating scanning welding reduces the peak temperature and temperature gradient in the welding process.

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Section: Introductionmentioning

confidence: 99%

Research on weld formation of SUS 304 stainless steel by laser oscillating scanning welding

Tang,

Aday

2024

Third International Conference on Advanced Manufacturing Technology and Electronic Information (AMTEI 2023)

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“…As computational materials science evolves, the microstructure evolution can be simulated by multi-scale models. Jiang et al [3] calculated the microstructure evolution during laser welding based on the PF method. Lenart et al [4] calculated the dynamic microstructure evolution in the local region by the PF method and compare it with the analytical model to illustrate the causes of the microstructure distribution.…”

Section: Introductionmentioning

confidence: 99%

Simulation of microstructure evolution process in the melt pool formed by laser cladding with a multi-scale model

Jin,

Chen

2023

J. Phys.: Conf. Ser.

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The microstructure directly determines the alloys’ mechanical performance, therefore understanding the microstructure evolution process is essential to controlling the cladding layer’s mechanical performance. A multiscale model in three dimensions is developed to evaluate the complicated microstructure evolution in the melt pool formed during the laser cladding process. The model consists of two parts: the FVM to calculate the evolution of the melt pool at the macroscopic scale, and the simulation of the solidification of grains at the microscopic scale by the CA. The high consistency with the experimental results proves the accuracy of the multiscale model in three dimensions. Using the developed model, the solid-liquid phase transformation process of the whole melt pool is studied and the impact of the variations of scanning speed on the microstructure is analyzed. The grain size decreases and the “laser-grain angle” increases with an increase in scanning speed. This study explains the evolution of the microstructure, which helps to customize the cladding layer’s microstructure.

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“…This is due to very fast and dynamic solidification behaviour which is difficult to be measured experimentally [10]. The solidification process is affected by the critical interactions between heat transfer and fluid flow behaviour near the solid–liquid interface in the molten pool [11].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of beam oscillation and its effect on the solidification parameters and grain morphology in remote laser welding of high-strength aluminium alloys

Mohan

Ceglarek

Franciosa

et al. 2023

Science and Technology of Welding and Joining

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This study investigated the effect of beam oscillation on the solidification behaviour during laser welding of Al-5754 to Al-6061 alloy. In this study, a finite element model has been developed to simulate temperature and fluid flow fields by implementing different combinations of volumetric heat source models. Solidification parameters such as temperature gradient (G), solidification rate (R), cooling rate (G × R) and G/R are evaluated to understand the mechanism of microstructure formation. It was found that beam oscillation improves the tensile strength by 21.4% for full penetration welding due to an increase in the percentage of formation of equiaxed grains. Modelling results revealed that the cooling rate increases with an increase in oscillation frequency. However, tensile strength followed a parabolic distribution with a peak at the oscillation frequency of 300 Hz.

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Multi-physics multi-scale simulation of the solidification process in the molten pool during laser welding of aluminum alloys

Cited by 42 publications

References 31 publications

Research on weld formation of SUS 304 stainless steel by laser oscillating scanning welding

Research on weld formation of SUS 304 stainless steel by laser oscillating scanning welding

Simulation of microstructure evolution process in the melt pool formed by laser cladding with a multi-scale model

Numerical study of beam oscillation and its effect on the solidification parameters and grain morphology in remote laser welding of high-strength aluminium alloys

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