About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Lightweight Alloy Matrix Composites
|
| Presentation Title |
Effect of Interlayer Defects on the Anisotropic Mechanical Behavior of WAAM Al-Mg Alloys |
| Author(s) |
Ye-Jin Seo, Min-Su Jeon, Yuanjiu Huang, Dong-Hyuck Kam, Min-Sun Oh, Kee-Ahn Lee |
| On-Site Speaker (Planned) |
Ye-Jin Seo |
| Abstract Scope |
Among aluminum alloys, the 5xxx series—commonly used in welding—offers excellent weldability, making it compatible with arc-based processes such as Wire Arc Additive Manufacturing (WAAM). WAAM is a high-efficiency metal 3D printing technique for producing large aluminum components, offering high deposition rates, reduced material waste, and no need for a vacuum chamber. These advantages make WAAM attractive for structural applications in aerospace and transportation. This study investigates the microstructure, porosity behavior, and mechanical properties of WAAM-processed Al-5356 and Al-Mg-Sc-Zr alloys. The Al-Mg-Sc-Zr alloy exhibited significant grain refinement (~14–18 μm) and precipitation strengthening via Al₃(Sc,Zr,Ti), but suffered from interlayer porosity (~1.02%) that degraded vertical tensile performance. In contrast, Al-5356 showed coarse grains (~95 μm), very low porosity (0.02%), and consistent mechanical behavior across directions. The results indicate that although microalloying improves strength, mechanical anisotropy in WAAM aluminum alloys is mainly influenced by the distribution of interlayer porosity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |