About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Preventing Mg Loss during Laser Powder Bed Fusion of an Al-Mg-Sc Alloy |
Author(s) |
Léa Deillon, Felix Jensch, Frank Palm, Markus Bambach |
On-Site Speaker (Planned) |
Léa Deillon |
Abstract Scope |
In Al-Mg alloys, precise control of the Mg content is essential to ensure predictable mechanical properties but Mg is commonly lost by evaporation and oxidation during thermal processing. In this study, we demonstrate the effectiveness of adding a low amount of Ca in preventing Mg losses during laser powder bed fusion of an Al-Mg-Sc alloy. After precipitation hardening, the new alloy - Calciscal®- shows a combination of high strength and good ductility owing to a fine-grained microstructure and the presence of numerous nano-sized precipitates. Moreover, the tensile properties are found to be very reproducible thanks to a better control and less variations of the Mg content. Transmission electron microscopy, electron backscattered diffraction and thermodynamic (equilibrium and out-of-equilibrium) predictions are combined to gain a better understanding of the complex microstructure that is formed during solidification and its subsequent evolution upon ageing, thus providing directions for further improvement of the composition. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Phase Transformations |