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 |
Hypereutectic Al-Si-Cu Alloy for Laser Powder Bed Fusion |
Author(s) |
Andrew Bobel, Yoojin Kim, Lee Casalena, Anil K Sachdev |
On-Site Speaker (Planned) |
Andrew Bobel |
Abstract Scope |
A hypereutectic Al-Si-Cu alloy was designed and evaluated for high strength and elevated temperature automotive applications using laser powder bed fusion (LPBF). A computational design approach combined with meltspinning experiments enabled rapid alloy development and down selection for atomization. Parameter development for the Al-Si-Cu alloy revealed a large printability range, between 1-3 J/mm2, with consolidation greater than 99.97% density. Electron backscatter diffraction (EBSD) analysis revealed an isotropic microstructure with no texturing, and transmission electron microscopy (TEM) revealed nano-Si particle formation and Al2Cu Theta-phase precipitation. Elevated uniaxial tensile properties and fully reversed (R=-1) tension-compression high cycle fatigue (1e7) show superior strengths compared to the commercial AlSi10Mg alloy across all test temperatures up to 300C. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |