| 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
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| Presentation Title |
Development of Aluminum Copper Alloys for LPBF Applications via In Situ Alloying of Commercial Powders |
| Author(s) |
John Mackenzie O`Connell, Anne Dunn, Timothy Nice, Nataniel Badgett, Mahmudul Hasan, Hunter Wilkinson, Deep Choudhuri, Bhaskar Majumdar |
| On-Site Speaker (Planned) |
John Mackenzie O`Connell |
| Abstract Scope |
The rapid solidification accompanying laser powder bed fusion (LPBF) additive manufacturing induces issues with segregation and cracking especially in high strength aluminum alloys. Utilizing CALPHAD, Scheil diagrams with the Kou model have shown that additions of silicon to Al-Cu alloys aids in liquid feeding into dendrite channels thus minimizing crack susceptibility. In order to reduce time and costs associated with procurement of custom powders, this work proposes to show that mechanical mixing of commercially available 2XXX aluminum powders with Al10SiMg, is a viable approach for rapid alloy design for crack mitigation. We have subsequently added Sc for grain refinement based on our recent computational work that showed in-liquid ordering near the Al3Sc intermetallic phase - pointing towards contributions from heterogeneous nucleation. Printability is assessed via SEM, EDS, and EBSD, looking for visible print defects, segregation of alloying elements and grain orientation.Tensile data are compared with conventional alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, ICME |