Spatter transport by inert gas flow in selective laser melting: A simulation study

Investigation of Spatter Trajectories in an SLM Build Chamber under Argon Gas Flow

“…Due to the complex nature of the problem under consideration, the multiphase modeling approach has been used for tracking the trajectory of spattering particles inside the chamber. Among the various multiphase modeling approaches, DPM is the most appropriate to track spatter particle trajectories and has been used successfully to track spatter particles trajectories in earlier studies [13,14,17]. The DPM uses an Eulerian-Lagrangian approach wherein the fluid is treated as a continuum for which Navier-Stokes equations are solved, while the discrete phase is solved by tracking individual particles through the flow field.…”

“…For dilute gas-solid flow similar to the spatter flow in inert gas, particle-particle interactions can be neglected and one-way coupling is considered. One-way coupling significantly reduces the computational time and this approach has been validated by Anwar et al [13] by matching the predicted spatter deposition maps with the experimental spatter data for their additive manufacturing chamber. Each particle is individually tracked and particles are assumed spherical and non-reacting.…”

“…Ladewig et al [11] and Anwar et al [12] experimentally investigated the influence of gas flow velocity on the build quality of parts and recommended the need for further efforts to understand and optimize gas flow within build chambers. Recently Anwar et al [13] performed a numerical study to investigate the spatter removal rate in an SLM 280 build chamber and showed that the spatter was not completely removed from the build plate even in the presence of inert gas flow for the flow rates considered in their study.…”

Effect of Shielding Gas Volume Flow on the Consistency of Microstructure and Tensile Properties of 316L Manufactured by Selective Laser Melting

“…Optimized gas flow can decrease porosity and improve the compression strength of the samples. Anwar et al [12,13] experimentally studied the influence of inert shielding gas flow velocity on the mechanical property of SLM-fabricated AlSi10Mg. The result shows that the flow velocity has a great impact on the mechanical property of SLM fabricated AlSi10Mg than part placement.…”

A Review of Heat Treatments on Improving the Quality and Residual Stresses of the Ti–6Al–4V Parts Produced by Additive Manufacturing

“…In fact, SLM appeared in 1996 through Wilhelm Meiners, Konrad Wissenbach, and Andres Gasser [6], and it is a process that must be done in a closed chamber surrounded by an inert gas, such as argon or nitrogen, to avoid oxidation of the material after melting, remove spatter, metal vapor, and plasma plumes [7][8][9][10]. In addition, the parts are usually connected to a substrate plate by support structures, in order to reduce deformations when manufacturing.…”