| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Revealing the Complexity of Reactive Inoculation in Laser Powder Bed Fusion by Advanced In-Situ and Ex-Situ Characterization and Modeling |
| Author(s) |
Adriana Eres-Castellanos, Kamel Fezzaa, John Martin, Xinyi He, Sophie Primig, Amy Clarke |
| On-Site Speaker (Planned) |
Adriana Eres-Castellanos |
| Abstract Scope |
Additive manufacturing (AM) affords the creation of complex part geometries and expanded applications, especially for aluminum (Al) alloys. However, the high thermal gradients inherent in AM, coupled with the thermal properties of Al alloys, often result in the formation of undesirable columnar grains and solidification cracking. Thus, recent efforts have focused on inoculation of Al alloys to induce grain refinement. Despite these efforts, a comprehensive understanding of the mechanism(s) responsible for grain refinement in these alloy remains elusive. This study investigates the effect of tantalum (Ta) inoculation in Al alloys by employing Al and Ta-inoculated Al powders deposited on Al substrates subjected to simulated laser powder bed fusion and in-situ x-ray radiography. Solid-liquid interface velocities were directly measured from radiographs and thermal gradients were modeled. Ex-situ transmission electron microscopy and theoretical modeling were also conducted, providing new insights into the mechanism(s) of grain refinement and optimizing AM of Al alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Characterization, Additive Manufacturing |