About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging for Materials Science and Processing
|
| Presentation Title |
Multiscale Characterization of Material Redistribution in LPBF Using X-ray Imaging and CFD |
| Author(s) |
Steven Van Petegem |
| On-Site Speaker (Planned) |
Steven Van Petegem |
| Abstract Scope |
Additive manufacturing (AM) of multimaterial components offers precise compositional control but is limited by poor mixing at interfaces, leading to heterogeneities and undesired phases. In this study, we investigate material redistribution during laser powder bed fusion (LPBF) of an Al–CuCrZr multimaterial using operando synchrotron X-ray radiography combined with X-ray computed tomography. Our results reveal that mixing occurs through discrete, stochastic bursts of material transport, rather than continuous interdiffusion. Copper redistribution is governed primarily by melt pool fluid dynamics and varies across successive laser scans, producing compositional inhomogeneities in the solidified microstructure. Local thermal gradients further influence solidification pathways. To contextualize these observations, we perform computational fluid dynamics (CFD) simulations that reproduce key features of the experimentally observed flow behavior and solute transport. Together, these results provide mechanistic insight into material transport during LPBF and offer experimental benchmarks for improving process control and validating simulation strategies in multimaterial AM. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Computational Materials Science & Engineering |