|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||Computational Analysis of Thermo-fluid Dynamics with Metallic Powder in SLM
||Subin Shrestha, Kevin Chou
|On-Site Speaker (Planned)
Selective Laser Melting (SLM) is a layer-by-layer fabrication process, during which the solid cross-sectional surface can be divided into line by line scanning. The metallic powder particles are subject to melting-solidifying along each line scanning which consequently results in intense thermo-capillary convection within the melt pool. In this study, a 3D thermo-fluid model using the volume of fluid approach with powder particles incorporated was developed using ANSYS/FLUENT. A sequential powder adding algorithm was utilized to generate randomly dispersed particles of a given size distribution in a powder bed. As a result of continuous melting and solidification, the temperature distribution, the molten metal flow, and the free-surface formation can be numerically analyzed. The model is employed to evaluate the build surface morphology from raster scanning scenario. Moreover, the influence of sequential additions of powder particles to the transport phenomena can be studied and the mechanisms of different pore formation investigated.
||Planned: None Selected