About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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Presentation Title |
A Powder-free Methodology to Develop New High-strength Al-alloys with Unique Microstructures and Mechanical Properties |
Author(s) |
Giuseppe Del Guercio, David Graham McCartney, Christopher Tuck, Marco Simonelli |
On-Site Speaker (Planned) |
Giuseppe Del Guercio |
Abstract Scope |
Laser-powder bed fusion (L-PBF) has opened new opportunities to design and process novel advanced materials with unique microstructures. However, the development of high-strength aluminium (Al) alloys is hampered by the occurrence of detrimental hot-cracking phenomena and limited availability of custom powders. In this talk, we design a custom Al-Cu-Ni alloy characterized by both optimized strength and processability with the aid of a powder-free methodology that predicts the cracking behaviour of custom compositions pairing predictive tools based on the CALPHAD approach and established hot cracking criteria. The calculations are experimentally validated via a detailed microstructural characterization and mechanical behaviour analysis of arc melted buttons of compositions remelted under L-PBF regimes. After the identification of the optimum composition, the alloy is gas atomized, printed, and fully characterized. The results highlight the need to diverge from traditional materials to exploit the merits of the new alloy design spaces opened by metal 3D printing. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Solidification |