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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
Presentation Title Real-Time Observation of Ti-6Al-4V Powder Particle Impact in Laser Directed Energy Deposition
Author(s) Marwan Haddad, Jun Fan, Rama Diop, Aslan Bafahm Alamdari, Michael Drakopoulos, Wenda Tan, Sarah Wolff
On-Site Speaker (Planned) Marwan Haddad
Abstract Scope Understanding the particle capture mechanism in the Laser-Directed Energy Deposition (L-DED) process offers a foundation for improving powder catchment efficiency. High-speed synchrotron X-ray imaging at NSLS-II in Brookhaven National Laboratory monitored the impact of individual Ti-6Al-4V powder particles in a L-DED process that are typically obscured under high influx of powder flow. Upon impact, a powder particle can penetrate the surface of the melt pool when the kinetic energy of the particle exceeds the localized liquid metal surface potential energy. However, other factors, such as Marangoni flow, can affect the penetration behavior of a powder particle depending on the point of impact on the surface of the melt pool. Furthermore, a multi-physics model verified how surface tension forces and Marangoni flow influence powder penetration behavior at the melt pool interface.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Titanium, Modeling and Simulation

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Hybrid CFD–Acoustic Modeling of Acoustic Emissions in Laser Powder Bed Fusion of AlSi10Mg
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Operando Characterization of the Spattering Process in Laser Powder Bed Fusion
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Part-Scale Evolution of Microstructural Heterogeneity Quantified at Fine Length-Scale in Solid-State Additive Manufacturing Process
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Placeholder - TBD
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Revealing cracking mechanisms and interfacial dynamics in dissimilar alloy additive manufacturing
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