About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development VI – Closed-Loop Alloy Design
|
Presentation Title |
Enhancing 3D Printability of High Strength Aluminum Alloys for LPBF Applications by Mechanical Mixing of Commercial 2024 and Al10SiMg Powders |
Author(s) |
John Mackenzie O`Connell, Timothy Nice, Nathaniel Badgett, Bhaskar Majumdar |
On-Site Speaker (Planned) |
John Mackenzie O`Connell |
Abstract Scope |
The rapid solidification associated with laser powder bed fusion (LPBF) additive manufacturing causes issues with segregation and cracking especially in precipitation strengthened aluminum alloys. This makes research and development of high strength Al-alloys that print well of paramount importance. The traditional method of alloy development for LPBF applications can be cost prohibitive due to the need to produce custom powders to test printability. This work proposes to show that mechanical mixing of commercially available 2024 aluminum powders, that are difficult to print due to issues with cracking, with Al10SiMg powders that print well in the proper ratio improves printability. Transverse sections of printed parts are examined with SEM, and EDS looking for cracks and porosity, and segregation of alloying elements. EBSD is used for grain size and orientation data in the printed metal. The ratios of aluminum powders are identified using the CALPHAD method and the Kou crack susceptibility model. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Characterization |