| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
|
| Presentation Title |
Laser Powder Bed Fusion of Al-Ce Alloys |
| Author(s) |
Holden Hyer, Abhishek Mehta, Le Zhou, Brandon McWilliams, Kyu Cho, Yongho Sohn |
| On-Site Speaker (Planned) |
Holden Hyer |
| Abstract Scope |
This study expands on previous work performed with the highly processable Al-10Ce alloy, by investigating the LPBF processing, microstructure, and mechanical performance of ternary Al-Ce-Mg towards a high strength, high temperature alloy. Alloy hardness and density were found to be a function of the varying degree of Mg in solid solution and the amount vaporized during laser exposure, but near full density was achieved with two parameter combinations at high (350 W) and low (200 W) laser power. The grain structure was found to be bimodal at 200 W, and equiaxed at 350 W. Moreover, the tensile strength and hardness were larger with use of the 200 W, but ductility increased with use of the 350 W. A fine (<1 µm) sub-grain cellular structure, with intermetallic Al11Ce3 ribbons was found located at the intercellular boundaries, contributing to the strength of the alloy through Orowan dislocation looping and Hall-Petch boundary strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Solidification |