About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Modification of casting Aluminum alloys using grain refinement strategies for LPBF applications |
| Author(s) |
John Mackenzie O`Connell, Anne Dunn, Gavin Fillip, Matthew Voelkel, Bhaskar Majumdar |
| On-Site Speaker (Planned) |
John Mackenzie O`Connell |
| Abstract Scope |
The rapid solidification seen in laser powder bed fusion (LPBF) and other types of additive manufacturing causes issues with segregation and cracking limiting the number of printable Al alloys. This makes research and development of alloys that print well of paramount importance. Previous research has demonstrated that modification of 10SiMg with grain refining elements like Sc improved printability, and increased alloy strength. The Kou model shows that larger liquid fractions retained during final solidification mitigates cracking, eutectic forming elements like Si achieve this. This work proposes to demonstrate that alloying a Al-Cu-Si casting alloy with grain refining elements Zr and Ti can improve the printability, and increase its strength through both grain refinement, and precipitation strengthening. Microstructure is assessed via SEM, EDS, and EBSD. Tensile strength is measured using printed tensile bars. Alloys of interest are identified using the CALPHAD method and Schiel diagrams, and the Kou crack susceptibility model. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, |