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 |
Refinement Mechanisms of Tantalum-inoculated Aluminum Subjected to Simulated Laser Powder Bed Fusion |
Author(s) |
Adriana Eres-Castellanos, Kamel Fezzaa, Hunter Martin, Amy Clarke |
On-Site Speaker (Planned) |
Adriana Eres-Castellanos |
Abstract Scope |
Additive manufacturing (AM) has opened doors to novel part geometries and applications, particularly for aluminum (Al) alloys. The high thermal gradients generated by AM, combined with the thermal properties of Al alloys, promotes the formation of columnar grains, which are usually undesirable. Inoculation of Al alloys to induce grain refinement, preventing solidification cracking and columnar growth, has been recently explored. However, more work needs to be done to fully understand the mechanisms by which grain refinement occurs in inoculated Al alloys for AM. In this work, the effect of Ta-inoculation was addressed by using Al and tantalum (Ta)-inoculated Al powders, placed on Al substrates and subjected to simulated laser powder bed fusion at the Advanced Photon Source (Argonne National Laboratory), while capturing in-situ x-ray radiography measurements. Raster track melting experiments at different laser speeds were conducted and characterized ex-situ. Solid-liquid interface velocities were directly measured and thermal gradients were modeled. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Solidification |