About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
An Advanced High-performance Aluminum Alloy Designed for Wire-arc Additive Manufacturing |
Author(s) |
Thomas Klein, Martin Schnall, Rudolf Gradinger, Stephan Ucsnik |
On-Site Speaker (Planned) |
Thomas Klein |
Abstract Scope |
The processing conditions prevailing during wire-arc additive manufacturing (WAAM) are challenging for the alloys used on numerous fronts. High-performance aluminum alloys are particularly demanding. For example, 2xxx and 7xxx are prone to hot-cracking. While an overwhelming body of literature is available on commercial alloys, there is no scientific reason for optimum suitability of these alloys for WAAM. Therefore, we present developments on a novel alloying strategy with the potential of high strength together with sufficient ductility. For this purpose, the Mg/Zn ratio in the system Al-Mg-Zn has adapted to improve the processability and the mechanical properties were tailored by microalloying additions. Specimens manufactured were free of cracks with a homogeneous microstructure. After optimization of the heat treatment a yield strength of ~395 MPa and a fracture strength of ~470 MPa was reached at a fracture elongation of ~5%. The strength values are comparable to high-performance wrought or forged aluminum products. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |