| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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| Presentation Title |
The 3D Microstructure of Annealed LPBF AlSi10Mg Characterized by a Combination of Synchrotron Microdiffraction and Transmission X-Ray Microscopy |
| Author(s) |
Marion Defer, Yubin Zhang, Soumyadeep Dasgupta, Ashwin Shahani, Xianghui Xiao, Wenjun Liu, Dorte Juul Jensen |
| On-Site Speaker (Planned) |
Marion Defer |
| Abstract Scope |
The high cooling rates in Laser Powder Bed Fusion of AlSi10Mg result in a fine anisotropic microstructure, leading to an enhancement of some mechanical properties but also higher brittleness. Performing post-print heat treatments can optimize these properties but requires a detailed understanding of the Si particle formation.
This work focuses on the distribution of Si particles in an Al matrix after annealing at 520°C for 2 hours using synchrotron microdiffraction (µXRD) and transmission X-ray microscopy (TXM). µXRD provided 3D crystallographic orientation data for both the Al and Si phases, despite challenges in separating their similar cubic structures. TXM, with phase contrast via defocusing, enabled the identification of Si particles. Combining the two sets of results allowed for a quantitative analysis of the Si particle size in relation to the grain boundary network of the Al matrix, facilitating a discussion on particle formation from the eutectic network in the as-printed state. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |