About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Selective Laser Melting of Novel 7075 Aluminum Alloy with Internally Dispersed Nanoparticles |
Author(s) |
Tianqi Zheng, Shuaihang Pan, Bingbing Li, Xiaochun Li |
On-Site Speaker (Planned) |
Tianqi Zheng |
Abstract Scope |
Due to its high performance, 7075 aluminum alloy has been widely used in aerospace and automobile industries. Selective laser melting (SLM) recently emerged as a promising platform to fabricate metallic components with complex structures. SLM has been successful in manufacturing aluminum alloys such as Al-Si-Mg alloys. However, SLM of high strength aluminum 7075 alloys is difficult to control for its tendency of hot cracking and elemental. Here, specially designed 7075 aluminum alloy powders with internally dispersed TiC nanoparticles are produced by gas atomization. These novel powders have been successfully laser printed to form parts with homogenous globular grains and little porosity, delivering a tensile strength of up to 550 MPa and ductility over 6.5% in as-printed state. After T6 heat treatment, the printed parts can offer a tensile strength of about 650 MPa. TiC nanoparticles play a crucial role in refinement and growth restriction of grains while eliminating hot cracks. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Composites |