| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Comparative Study of Al-Mg-Ti(-Sc-Zr) Alloys Fabricated by Cold Metal Transfer and Electron Beam Additive Manufacturing |
| Author(s) |
Jiangqi Zhu, Xingchen Yan, Tim Langan, Jian-Feng Nie |
| On-Site Speaker (Planned) |
Jian-Feng Nie |
| Abstract Scope |
In this work, Al-5Mg-0.1Ti and Al-5Mg-0.1Ti-0.2Sc-0.1Zr (wt.%) alloys fabricated by cold metal transfer (CMT) and electron beam additive manufacturing (EBAM) are investigated. The Sc and Zr addition improves the processability of Al-Mg-Ti alloys with EBAM by eliminating cracks in their as-deposited microstructure. Additionally, the Sc and Zr addition promotes columnar to equiaxed transition in the as-deposited Al-Mg-Ti alloys, exhibiting a fully equiaxed microstructure with grain sizes decreased by at least 70% compared to the unmodified alloy in both cases. Grain refinement in the as-deposited Al-Mg-Ti-Sc-Zr alloy samples is attributable to: the inoculation effect of primary Al3(Sc,Zr,Ti) phase, the grain growth restriction effect provided by solute elements, and Zener pinning effect of the solid-state precipitates of Al3Sc. Moreover, the Sc and Zr addition improves the hardness and yield strength of Al-Mg-Ti alloys in the as-deposited state, achieved by grain size strengthening and precipitate strengthening mechanisms. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Characterization, |