Molten pool air-liquid interface in high-power laser manufacturing: Evolution law and energy absorption characteristics

Xie, Shun Yi; Zhu, Baoqi; Qiao, Junnan; Zhuang, Yuan; Yu, Zhanjiang; Zou, Jianglin

doi:10.1016/j.surfin.2023.103214

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…In addressing the heat transfer-flow-solidification process within the molten pool [28][29][30][31], a "heat-flow" coupled model has been established for simulation and computation. This model assumes the molten metal liquid to be an incompressible Newtonian fluid while neglecting the impact of turbulence.…”

Section: Research Methodology 21 Governing Equationmentioning

confidence: 99%

Simulation Study on the Energy Utilization Efficiency of a Turbine Impeller Based on a Selective Laser Melting Process

Guo,

Wang,

Wang

et al. 2023

Applied Sciences

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In this paper, a simulation model for Selective Laser Melting (SLM) technology is established to simulate the additive manufacturing process of a turbine impeller for an aerospace engine. By utilizing the simulation model, variations in laser power and scanning speed are employed to obtain simulated results of thermal deformation for the turbine impeller under different laser power and scanning speed conditions. The results indicate that the thermal deformation of the component increases with the augmentation of laser power, decreases with the escalation of scanning speed, and eventually stabilizes. Based on the relationship between thermal deformation and energy, the energy utilization efficiency of the SLM process under different conditions is calculated. The findings demonstrate that, within a certain range of power, the synergistic effect of laser power and scanning speed allows for an increase in energy utilization efficiency and a reduction in processing time while ensuring the mechanical performance of the formed parts. Consequently, this approach proves effective in lowering production costs for complex components based on SLM technology.

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Section: Research Methodology 21 Governing Equationmentioning

confidence: 99%

Simulation Study on the Energy Utilization Efficiency of a Turbine Impeller Based on a Selective Laser Melting Process

Guo,

Wang,

Wang

et al. 2023

Applied Sciences

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Scale analysis of undercut and bulge driven by thermocapillary convection due to surface-active solute on a solidified surface

Wei,

Pan,

Weng

2024

Physics of Fluids

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This study scales the shape of the undercut, a depression region near the triple-phase line parallel to the scanning direction, and the bulge in the central region within the fusion zone, considering thermocapillary convection affected by a surface-active solute in the molten pool for the first time. Undercuts, commonly encountered in welding, additive manufacturing, and re-solidification processes, reduce fatigue and fracture strength while enhancing stress concentration. Utilizing the interfacial Young–Laplace equation and Bernoulli equations in the shear layer driven by thermocapillary force influenced by the surface-active solute-affected critical temperature, and introducing the concept of mass conservation, the scale analysis finds that the undercut depth and bulge height increase as Marangoni and Prandtl numbers increase, and the loss coefficient decreases. Furthermore, the widths of the undercut and bulge exhibit increases with dimensionless beam power, fusion zone width, and the ratio of solid-to-liquid thermal conductivity. The COMSOL Multiphase code is also used for simulation and successful comparison, aligning with experimental data from laser polishing. This analysis aids in understanding and controlling microstructures in various processes beyond laser polishing.

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Molten pool air-liquid interface in high-power laser manufacturing: Evolution law and energy absorption characteristics

Cited by 2 publications

References 30 publications

Simulation Study on the Energy Utilization Efficiency of a Turbine Impeller Based on a Selective Laser Melting Process

Simulation Study on the Energy Utilization Efficiency of a Turbine Impeller Based on a Selective Laser Melting Process

Scale analysis of undercut and bulge driven by thermocapillary convection due to surface-active solute on a solidified surface

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