Transient simulation of particle transport and deposition in the laser powder bed fusion process: A new approach to model particle and heat ejection from the melt pool

• DOI: 10.1016/j.addma.2021.102135
• Publication Date: 2021-06-24T11:59:29Z
• Authors: Johannes Altmeppen; Robert Nekic; Philipp Wagenblast; Stephan Staudacher
• Keywords: Deposition; Particle (ecology); Transient (computer programming); Particle deposition; Inert; Inert gas

Ensuring consistent product quality and reproducibility is of paramount importance in additive manufacturing. This applies particular to the laser powder bed fusion procedure. Process parameters, such as power, scanning strategy or inert gas properties, affect generation emissions by-products spatters fumes their removal from process chamber. Numerous authors investigated these effects numerical studies predict suitable parameter sets. However, basic challenge modelling time-dependent particle heat ejection moving melt pool region well predicting resulting transport deposition mechanisms with sufficient accuracy still remains. In this context, an approach statistical underlying transfer into chamber through analytical considerations presented. Particle are numerically for case a real application. Several production layers covered one transient simulation, assessing influence different strategies. Especially effect convective flow caused by high influx investigated. Results compared data obtained associated experiment. The presented model enables simulation arbitrary patterns properties without need preceding experimental determining pattern specific rates.