About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Impingement and Solidification Morphology of Liquid Metal Droplets in Additive Manufacturing via Magnetohydrodynamic Liquid Metal Jetting |
Author(s) |
Viktor Sukhotskiy, Nicholas Noel Watkins, Kellen David Traxel, Andrew Pascall, Erik Einarsson, Jason Jeffries |
On-Site Speaker (Planned) |
Viktor Sukhotskiy |
Abstract Scope |
Powderless and beamless metal additive manufacturing (AM) processes continue to gain importance as low-cost alternatives to conventional techniques. Inspired by aqueous inkjetting and metal spray forming, liquid metal jetting (LMJ) uses propelled submillimeter liquid metal droplets to rapidly build high density metal parts. In an LMJ-AM process, the control of droplet patterning, coalescence and solidification is critical to ensure dimensional accuracy, low porosity and minimized surface roughness. Post-deposition droplet shape and grain structure are very sensitive to simultaneous drop spreading, rapid solidification, and freezing of the contact line. Therefore, it is important to understand key process variables and their effect on droplet solidification dynamics. We present a combined numerical-experimental analysis of key process parameters such as droplet velocity, size, droplet temperature, substrate temperature and thermofluidic properties. The results are presented in a dimensionless Weber vs. Freezing number space, with emphasis on droplet aspect ratio.
Prepared by LLNL under contract DE-AC52-07NA27344/IM-1052413 |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |