About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Crack Mitigation in Aluminum-Scandium Alloys for Laser Powder-Bed Fusion |
| Author(s) |
Nathan Andrew Smith, Mostafa Yakout, Mohamed Elbestawi, Luc Duchesne |
| On-Site Speaker (Planned) |
Nathan Andrew Smith |
| Abstract Scope |
Additive manufacturing (AM) has been rapidly expanding in its capability. A limiting factor in the application of AM methods, such as laser powder-bed fusion (L-PBF) is a deficit in available materials, which is particularly pronounced in a lack of qualified aluminum alloys. While the presence of scandium in aluminum alloys for AM is not new, the concentrations are typically held near a full weight percent, to achieve the desired grain refining effect. In lesser quantities, scandium additions alone are not sufficient to generate crack-free layers, largely a result of supersaturation in the aluminum matrix, suspending the generation of the Al3Sc dispersoids responsible for enhanced grain refinement. In this work, a trio of novel alloys were synthesized via powder blending to address the presence of cracking through the incorporation of commercially available zirconium dihydride powder. The results show that scandium amounts can be substantially reduced while still producing significant material strength. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Additive Manufacturing, Aluminum, Powder Materials |