About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
H-28: CFD Informed Strategy for the 3D Printing of Crack-free High-strength Al-alloys |
Author(s) |
Giuseppe Del Guercio, David Graham McCartney, Sebastien Faron, Adam Clare, Marco Simonelli |
On-Site Speaker (Planned) |
Giuseppe Del Guercio |
Abstract Scope |
The densification of alloys manufactured by Laser Powder Bed Fusion (L-PBF) is influenced by the thermal history experienced by the material during processing. The cooling rates and thermal gradients caused by L-PBF regimes may result in detrimental hot cracking phenomena. The control of the thermal history and the prediction of the associated cracking tendency are key in highlighting processing regimes able to print crack-free components. Here, we discuss the cracking behaviour of a popular high-strength aluminium alloy (AA2024) computing established cracking indices informed by computational fluid dynamics (CFD). The study is conducted as a function of multiple process parameters investigating the temporal and spatial evolution of the alloy’s crack propensity. The results highlight L-PBF regimes able to avoid hot cracks and shed light on the thermo-physical dynamics involved in their nucleation. This work proves how pairing CFD and material science can result in crack-free high-strength aluminium components without material modification. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Computational Materials Science & Engineering |