| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
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| Presentation Title |
In situ synchrotron diffraction study of ultra-fine microstructure formation during directed energy deposition additive manufacturing of a high-performance Al alloy |
| Author(s) |
Da Guo, Chengbo Zhu, Kai Zhang, Harry E. Chapman, Imogen Cowley, Ravi Shivaraman, Amanpreet Kaur, Dmitry Eskin, Iakovos Tzanakis, Robert Atwood, Stefan Michalik, Chu Lun Alex Leung, Peter D. Lee |
| On-Site Speaker (Planned) |
Da Guo |
| Abstract Scope |
Directed energy deposition (DED) is a promising technology enabling repair and production of geometrically complex components in a range of alloys, including aluminium. However, casting alloys (e.g. Al10SiMg) and high-strength Al alloys (e.g. 6xxx and 7xxx series) may suffer from poor mechanical performance or poor processability during additive manufacturing (AM). To address these issues, we developed two new Al alloys based on Al-Fe-Mn-Ni-Ce system specifically for AM applications. Preliminary results indicate the as-deposited DED components have an ultra-fine grain size, uniform distribution of intermetallics and sufficiently high properties. In situ X-ray diffraction at Diamond Light Source beamline I12 was utilised to investigate the microstructure and strain evolution of these Al-Fe-Mn-Ni-Ce alloys during DED. The diffraction data provides the insights on grain refinement mechanisms. The results are guiding future material design strategies with the goal of producing high-performance DED components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Solidification |