About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development VI – Closed-Loop Alloy Design
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Presentation Title |
Novel, Elevated Temperature Al-Ce-Mo Alloys for Additive Manufacturing |
Author(s) |
Kevin Graydon, Thinh Huynh, David Hicks, Yongho Sohn |
On-Site Speaker (Planned) |
Kevin Graydon |
Abstract Scope |
The extreme thermo-kinetic processing conditions of laser powder bed fusion (LPBF) can pose a challenge for engineering alloys developed for wrought or casting methods. In this study, a novel Al - 9.5wt.% Ce - 0.2, 0.6 and 1.0wt.% Mo ternary system was examined for high temperature applications. Various ternary alloying additions were explored using kinetic considerations and CALPHAD methods, and the Al-Ce-Mo alloys were experimentally investigated through in-house gas atomization of powders, LPBF, in-situ tensile testing up to 400°C, and material characterization. A machine learning model was employed to predict the optimal LPBF parameters. Relative densities above 99.5% were achieved with 350W laser power and a scan speed range of 1000-1600mm/s. Solid solutioning of Mo was observed due to rapid solidification. Tensile testing data, post heat-treatment hardness measurements up to 600°C, and microstructural evolutions were documented and analyzed as functions of time, temperature, and Mo content. |
Proceedings Inclusion? |
Planned: |