| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Tailoring the Transition Microstructure of Bimetallic Builds Via Additive Manufacturing with High-Intensity Ultrasound |
| Author(s) |
Xianqiang Fan, Harry Chapman, Catherine Tonry, Ivars Krastins, Kai Zhang, Sebastian Marussi, Samuel Clark, Alexandar Rack, Chu Lun Alex Leung, Andrew Kao, Peter D. Lee |
| On-Site Speaker (Planned) |
Xianqiang Fan |
| Abstract Scope |
Bimetallic structures benefit from the combined exceptional properties of the two dissimilar materials, offering potential solutions to many engineering problems. Directed energy deposition (DED) additive manufacturing is an effective route to fabricate bimetallic structures. However, poor microstructure, particularly the formation of brittle intermetallic phases, at the transition layer can result in cracks or delamination during fabrication. Applying ultrasound introduces external forces into the melt pool, alters the melt pool dynamics and potentially optimising the transition microstructure. The mechanisms by which ultrasound alters the transition microstructure is multi-faceted the principal of which was the combination of inertial sloshing and increased mixing level. Using in situ high-speed synchrotron X-ray imaging, we demonstrated the refinement of intermetallic phases using ultrasound and revealed the mechanisms. We mapped the ultrasound effect by varying its amplitudes, showcasing DED with ultrasound for creating bimetallic structures with tailored transition microstructure, enabling fabrication of defect-lean multi-material and multi-functional components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Process Technology |