| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Effect of Zr Alloying Content on the Printability and Property of Laser Powder Bed Fused Aluminum 5083 Alloys |
| Author(s) |
Le Zhou, Holden Hyer, Sharon Park, George Benson, Yongho Sohn |
| On-Site Speaker (Planned) |
Le Zhou |
| Abstract Scope |
As many conventional aluminum alloys behave poorly for laser powder bed fusion (LPBF), novel aluminum alloys with improved printability and property are desired for LPBF. One design strategy is to develop LPBF aluminum alloys with refined grain structures via alloying with Zr. AA5083 and AA5083 modified with 0.7wt.% and 1.0wt.% of Zr have been manufactured by LPBF using gas atomized powders. Parametric investigation showed that the porosity development was similar for all alloys at various processing parameters. However, the Zr addition helped to eliminate/reduce the amount of cracks observed in as-built samples. Furthermore, the higher Zr concentration expanded the processing window and improved the printability. The microstructure was significantly refined in the as-built Zr-modified AA5083 alloys due to the in-situ grain refining associated with the formation of Al3Zr. Tensile tests of as-built and heat-treated Zr-modified AA5083 alloys demonstrated that the Zr also contributed to the strength increase through precipitation strengthening. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |