About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
|
Presentation Title |
Laser Powder Bed Fusion of Nanoparticles-Enabled High-Zinc Al-Zn-Mg-Cu Alloys |
Author(s) |
Tianqi Zheng, Shiqi Zheng, Jingke Liu, Bingbing Li, Xiaochun Li |
On-Site Speaker (Planned) |
Tianqi Zheng |
Abstract Scope |
The high-zinc Al-Zn-Mg-Cu alloys offers highest strength among aluminum alloys due to their high fraction of strengthening precipitates. However, high-zinc Al-Zn-Mg-Cu alloys are susceptible to hot-cracking and zinc/magnesium vaporization, thus difficult to be processed by Laser Powder Bed Fusion (LPBF). Here, specially designed high-zinc Al-Zn-Mg-Cu powders containing 11.63 wt% Zn with internally dispersed TiC nanoparticles, produced by gas atomization, are used for LPBF. Through parameter optimization, we have been able to print the parts with low porosity (<1%) and fine grain structures, offering an ultimate tensile strength (UTS) up to 520 MPa in the as-printed state. After T6 heat treatment, the samples can deliver a yield strength of 723 MPa, UTS of 770 MPa and ductility over 6%, which are the highest strengths among all 3D-printable aluminum alloys. The nanoparticle approach is very effective in enabling high quality printing of ultrahigh performance aluminum alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Nanotechnology |