| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Additive Manufacturing of A356 Aluminum Alloy with Incorporated Oxygen Atoms |
| Author(s) |
Juyeon Han, Soomin Kim, Somin Lee, Zhenxing Zhou, Soomin Lee, Weiwei Zhou, Naoyuki Nomura, Hyunjoo Choi |
| On-Site Speaker (Planned) |
Juyeon Han |
| Abstract Scope |
Recent investigations on I-A356 alloy have demonstrated its ability to mitigate the trade-off between strength and ductility through the formation of wide low-angle boundaries (WLAB), where interstitial oxygen facilitates dislocation movement and subgrain formation, leading to grain refinement and enhanced mechanical properties. This study aims to apply these findings to the LPBF (Laser Powder Bed Fusion) additive manufacturing process to address the limitations of the inherent cellular structure, which compromises mechanical properties.
Ingots of A356 alloy with ZnO nanoparticles were atomized to produce powder with a particle size below 50 μm and characterized for flowability, friction coefficient, size distribution, and laser absorptivity. Process parameters, including laser power and scan speed, were optimized. Microstructural analyses using SEM, OM, and EBSD were conducted to evaluate cellular structure size, while Vickers hardness tests assessed mechanical properties. Additionally, XRF and XRD analyses were performed to investigate the effects of interstitial oxygen. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Composites |