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Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Influence of droplet parameters on porosity in metal parts manufactured with droplet-on-demand metal jetting
Author(s) Viktor Sukhotskiy, Laura Marquez, Kellen Traxel, Andrew Pascall, Jason Jeffries
On-Site Speaker (Planned) Viktor Sukhotskiy
Abstract Scope Liquid metal jetting (LMJ) is a molten metal droplet-based additive manufacturing method, which has great potential as a low-cost high-performance alternative to established technologies. As with many AM methods, minimizing porosity in LMJ is key to ensuring strong mechanical properties. To date, several perspectives have been proposed on minimization of porosity in LMJ, most of which center on the thermal and fluid properties of the metal droplet as the voxel of LMJ. We extend the work to date by experimentally and computationally showing that the droplet Weber number, the Freezing number, along with a new dimensionless thermal deposition rate metric can together enable process maps that track solidified droplet shape, degree of remelting and porosity trends. The improved processing map presented here will enable higher quality part production across material systems by enabling reduced porosity, ensuring droplet-droplet bonding and improving resolution. Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-2019000
Proceedings Inclusion? Undecided

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