| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Understanding Chemical Homogeneity and elemental mixing in Al-Zn Multi-Material Systems through Process Parameter Control of Laser Powder Bed Fusion |
| Author(s) |
Fanyue Kong, Ji Ma, James Burns, John Scully |
| On-Site Speaker (Planned) |
Fanyue Kong |
| Abstract Scope |
Additive manufacturing (AM) offers the ability to fabricate multi-material and compositionally graded parts, achieving two main objectives: 1) reducing feedstock costs and enabling in-situ alloying to avoid the need for pre-alloyed powders, and 2) improving composition control, including location-specific compositions and gradients. This study focuses on the elemental mixing during the melting of dissimilar metals, particularly examining the effects of process parameters on mixing in an Al-Zn multi-material system. Control over process parameters enhances chemical homogeneity during mixing, resulting in diverse chemical composition distributions within the melt pool. The Marangoni flow influences the microstructure, leading to cellular/dendritic α-Al and η-Zn formations, with a transitional zone displaying a eutectic structure. Additionally, the remelting process can further improve chemical homogeneity, reaching similar homogeneous microstructure of previously studied Al-Zn alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Joining |