Defects caused by powder spattering and entrainment in laser powder bed fusion process: High-fidelity modeling of gas, melt pool and powder dynamics
National University of Singapore · City University of Hong Kong
Abstract
Inconsistent product quality is one of the major bottlenecks hindering the widespread adoption of laser powder bed fusion (LPBF) additive manufacturing technology in various industries. A vital source of the inconsistency is the defect caused by the powder spattering and entrainment in the melting process. However, the mechanisms of defect formation remain elusive due to the highly-dynamic nature of multiphase flow. Here we develop a multi-physics simulation model, together with experiment validations, to simultaneously elucidate the gas, melt pool and particle dynamics in the melting process. The high-fidelity simulations successfully uncover the mechanisms of defect formation. In particular, the large…
Citation impact
- FWCI
- 32.50
- Percentile
- 100%
- References
- 82
Authors
6Topics & keywords
- Materials science
- Entrainment (biomusicology)
- Fusion
- Process (computing)
- Chemical engineering
- Mineralogy