Study on the Effect of the Remelting Process on Tc4 Selective Laser Melting Samples

Liu, Yude; Li, Pengyue; Shi, Wentian; Liu, Shuai; Guo, Jing; Zhou, Yusheng

doi:10.2139/ssrn.4096886

Cited by 1 publication

(2 citation statements)

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“…(5) The model uses a boundary heat source acting directly on the metal surface, so the effect of the amount of defocusing on the melt pool is not considered and the depth of focus effect is ignored; (6) The magnetic flux density B is uniformly distributed on the substrate in a direction perpendicular to the substrate axially and parallel to the surface of the molten coagulation layer.…”

Section: Physical Model and Assumptionsmentioning

confidence: 99%

“…It has the characteristics of fast heating and cooling and can improve the mechanical properties of materials by changing their surface properties without changing their composition [2][3][4][5]. For example, Li et al studied the quality and mechanical properties of Ti6Al4V selected-area laser melting and forming [6]. With an increase in the number of lasers remelting, the upper surface quality and denseness of the Ti6Al4V sample parts gradually improved, and the surface roughness also improved.…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Dynamic Evolution Mechanism of the Steady Magnetic Field on the Internal Flow Behavior of a Laser Melting Pool

Xie

Wang

et al. 2023

Metals

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A 2D model of laser melting consisting of heat transfer, hydrodynamic flow, surface tension, and a free surface motion was established. A physical field simulation of the laser melting process was performed, and the effect of steady magnetic field parameters on the internal flow and temperature fields of the melt pool was analyzed and validated by experiments. The results show that the steady magnetic field can suppress the melt pool flow rate, but slightly influences its temperature field, and with an increase in the magnetic field strength, the ripples on the melting surface decrease with increasing magnetic flux density. Compared with the molten pool depth experiment results, the simulation molten pool depth was 792 μm, representing a difference in value of 13.5%. The surface ripples of the molten pool fluctuated greatly in the absence of a magnetic field, while the surface ripples were suppressed when the magnetic flux density was 2T. This is consistent with the simulation results, thus effectively demonstrating the simulation model’s accuracy.

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Section: Physical Model and Assumptionsmentioning

confidence: 99%