Aluminum (Al) alloys are commonly used in aerospace and automotive industries. Selective laser melting (SLM) is used to create complex parts with design flexibility. Most studies focus on medium-strength Al-Si and Al-Si-Mg alloys suitable for 3D printing. High-strength Al alloys like AA 6061 and AA 7075 can suffer hot cracking during manufacturing, but adding fine particles like TiN or TiC can strengthen them. Despite attempts to produce ultra-strong Al alloys using methods like severe plastic deformation, the highest strength achieved is 300-500 MPa. This study introduces new high-strength Al alloys using nanoscale intermetallics. Microstructural analysis shows unique laminated structures, with fine rosettes and cellular precipitates enhancing strength and deformability. Ultra-high strength Al alloys exceeding 700 MPa are achieved through this innovative approach.
https://www.nature.com/articles/s41467-024-48693-4