|About this Abstract
||Materials Science & Technology 2019
||Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
||Connecting Process Parameters to Grain Structure of Parts Produced by Laser Powder-bed Fusion Additive Manufacturing Using a Monte Carlo Potts Model
||Joseph G. Pauza, Anthony D. Rollett
|On-Site Speaker (Planned)
||Joseph G. Pauza
Parts produced with laser powder-bed additive manufacturing show a wide range of unique grain structures. The black box that is the laser powder-bed machine makes understanding how these grain structures form throughout the printing process very difficult. We propose using a Monte Carlo Potts model to understand the grain structure evolution in these parts as a function of process parameter inputs. The model accepts physical machine parameters in order to generate the simulated bulk grain structure. The thermal field is generated throughout the simulated volume using a novel dual pole Rosenthal point heat source capable of producing keyhole melt pools. The preferred <001> growth direction for FCC alloys has been added to the model to observe the influence of this factor on texture evolution. Validation of the simulated microstructures is performed with comparison to both single bead and multi-layer part cross sections, as well as NIST benchmark results.