|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||A Multiphase CFD Model for the Prediction of Particulate Accumulation in a Laser Powder Bed Fusion Process
||Adam Philo, Daniel Butcher , Stuart Sillars, Chris Sutcliffe, Johann Sienz, Stephen Brown, Nicholas Lavery
|On-Site Speaker (Planned)
In Laser Powder Bed Fusion (L-PBF) systems an inert gas flow is used to avoid oxidation of the metal alloy powder and components but is also used to remove unwanted by-products produced from the vaporisation of material. By-products produced during in L-PBF can cause attenuation of the laser and re-deposition of unwanted by-products over the processing area.
The two main by-products produced in L-PBF are spatter caused from melt pool instabilities and recoil pressure from the metal vapour plume and particulate condensates. A multiphase CFD model developed in ANSYS Fluent simulates the argon gas flow in a Renishaw AM250 machine validated using Hot Wire Anemometry (HWA) testing. This model is then coupled with a spatter expulsion Discrete Phase Model (DPM) based on high speed imaging analysis and a tertiary phase model of the metal vapour plume.
||Planned: None Selected