About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
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Presentation Title |
In-situ Monitoring of Particle Impact on Melt Pool Flow in Laser Directed Energy Deposition Additive Manufacturing |
Author(s) |
Sarah Wolff, Marwan Haddad, Aslan Bafahm Alamdari, Kristina May, Wenda Tan, Jun Fan |
On-Site Speaker (Planned) |
Sarah Wolff |
Abstract Scope |
Porosity and microstructure of printed metal parts with laser directed energy deposition (L-DED) processes are dependent on the rapid solidification during printing and can pose obstacles by deteriorating the mechanical properties of the parts. The interaction between the melt pool and the deposited particle can play a role in porosity formation and the final microstructure by effecting the melt flow due to its kinetic velocity and location of impact. Particle and melt pool interaction is investigated by using on and off axis high speed imaging. First individual stainless steel (SS 316L) powder particles are repeatable deposited by varying the speed and location of deposition on the melt pool. Second the powder flow rate is scaled gradually to industrial-grade levels to study its effect on porosity percentage and microstructure. The results are used to validate computational thermo-fluid dynamic models that aim to predict temperatures and properties for the L-DED process. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Solidification |