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)
|
Presentation Title |
In Situ High-speed X-ray Imaging of the Alloying Process via Laser-based Directed Energy Deposition with Dissimilar Powders |
Author(s) |
Hui Wang, Benjamin Gould, Marwan Haddad, Michael Moorehead, Adrien Couet, Sarah J. Wolff |
On-Site Speaker (Planned) |
Hui Wang |
Abstract Scope |
Laser-based directed energy deposition (DED) additive manufacturing (AM) of the alloying process was performed using dissimilar powders of Mo, Nb, Ti, and V. The alloying processes were directly observed by in situ high-speed X-ray imaging. The traveling trajectories and velocities of four different types of powders were studied to reveal the particle delivery performance. The melting modes, residence times, and the size changes of these four-element powders were obtained during the in situ alloying processes. The melt-pool dynamics were studied through the analysis of the resulting melt-flow velocities. The melt flow will benefit the uniform element distributions in the fabricated alloy. The porosity was mainly induced by unmelted particles and entrapped gas in such a process. This study will narrow the gaps between the applied research and the fundamental understanding of the impact of different elemental powders on melt-pool properties and defect production in the alloying formation via DED AM. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |