Multivortex convection of metal in molten pool with dispersed impurity induced by laser radiation

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

“…Preheating of the substrate can partially solve this problem, but it does not change the overall picture. Another set of these granules continues in the convective flow up to the moment of solidification, and then stays on the surface of the solidified surface of the molten pool ( Figure 14) [93,94]. values of laser power, the excess of energy leads to the formation of a plasma cloud [91], which accompanies the process (Figure 13b).…”

Particulate migration behavior and its mechanism during selective laser melting of TiC reinforced Al matrix nanocomposites

“…They pointed out that the fluid flow within the melt pool played a significant role in the mechanisms of solute redistribution. A physicomathematical model was proposed by Kovalev et al [10] to simulate two-phase thermohydrodynamic flows in laser induced melt pool of a steel substrate. It was found that the three-dimensional multivortex flows were responsible for thermohydrodynamics of the melt and resultant distribution of tungsten and titanium carbide particles.…”

Thermal evolution behavior and fluid dynamics during laser additive manufacturing of Al-based nanocomposites: Underlying role of reinforcement weight fraction

“…Alternatively, some numerical methods have been developed to simulate the heat transfer and fluid flow within laser-induced melt pool. Kovalev et al 17 numerically investigated the convective heat and mass transfer within laser-induced melt pool. They pointed out that the multivortex fluid flows were mainly responsible for the movement of the reinforcing particles, which influenced the final distribution state of the reinforcing particles within the metal matrix.…”