About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
Presentation Title |
Nanoparticles-Enabled Laser Powder Bed Fusion of High Strength 6061 Aluminum Alloy |
Author(s) |
Tianqi Zheng, Changyu Ma, Narayanan Murali, Bingbing Li, Xiaochun Li |
On-Site Speaker (Planned) |
Tianqi Zheng |
Abstract Scope |
Wrought aluminum alloy 6061 (AA6061) has been used in automotive, aerospace and many other areas owing to their good strength, excellent corrosion resistance and good weldability. However, AA6061 is susceptible to hot cracking and shrinkage problems due to its large solidification range and high cooling rate of Laser Powder Bed Fusion (LPBF) process. Here, AA6061 powders with internally dispersed nanoparticles (TiB2 and TiC) are produced for LPBF study. Through parameter optimization, crack-free parts with low porosity (<0.5%) and fine globular grains have been successfully printed. The as-printed AA6061 offers a yield strength of 277 MPa, ultimate tensile strength of 350 MPa, and a ductility of around 10 %. This study shows nanoparticles can enable LPBF for printing high quality AA6061 parts, achieving comparable strength with traditional T6 wrought counterparts without post-printing heat treatment. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Nanotechnology |