| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Dissolution and Development of Al3(Sc,Zr) Dispersoids in 5025 Structures Produced via Wire Arc Additive Manufacturing |
| Author(s) |
Sonja Blickley, Tori Nizzi, Anna Palmcook, Austin Schaub, Timothy James Langan, Carson Williams, Paul G. Sanders |
| On-Site Speaker (Planned) |
Tori Nizzi |
| Abstract Scope |
Aluminum alloys are of growing interest in fields requiring high specific strength structural materials and are a promising choice for additive manufacturing applications. Aluminum wire arc additive manufacturing (WAAM) as a method of production is also increasing in development and use, predominantly using available welding filler alloys (i.e. 5356, 5183, etc.) as feedstock. As a manufacturing method, there is an interest in pursuing new aluminum alloy development to produce strengths superior to currently available materials. Alloys of aluminum and scandium offer increased strength and grain refinement as well as post-processing heat treatability that makes them well suited as a feedstock for WAAM applications, however the complex thermomechanical history of wire production, as well as the thermal input during WAAM processing, has significant impact on the dissolution, precipitation, structure, and morphology of Al3Sc dispersoids. In this work, aluminum alloy 5025 (5356 + 0.3 wt%Sc & 0.15 wt% Zr) is used to produce WAAM structures, and the resulting material microstructure and properties are characterized. Transmission electron microscopy is used to study Sc and Zr dissolution, Al3X dispersoid morphology, and dispersoid chemistry in WAAM samples in both as-printed and post-print heat treated conditions. Suggestions are made for optimizing use of Al-Sc alloys in WAAM applications. |
| Proceedings Inclusion? |
Planned: Light Metals |