About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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| Presentation Title |
Directed Energy Deposition (DED) of Ni-Al Functionally Integrated Materials (FIMs) via In-situ Alloying with Elemental Ni and Al Powder Feedstocks |
| Author(s) |
Baolong Zheng, Xin Wang, Benjamin E. MacDonald, Calvin H. Belcher, Penghui Cao, Lorenzo Valdevit, Enrique J. Lavernia, Julie M. Schoenung |
| On-Site Speaker (Planned) |
Baolong Zheng |
| Abstract Scope |
Directed energy deposition (DED) additive manufacturing enables the precise control of composition for the development of functionally integrated materials (FIMs) with site-specific functionality. This compositional control is enabled by the powder injection delivery system that allows for the co-deposition of multiple feedstock powders through individual powder feeders. This process provides a path to rapid development of novel alloys and components with location-dependent properties. In this work, elemental Ni and Al feedstock powders were co-deposited to produce in situ alloyed compositional transitions from Ni to NiAl along the build direction of Ni-NiAl gradient samples. The evolution of microstructure, composition, phases, defects, and mechanical properties were investigated as a function of position in FIMs via experimental characterization and analysis with SEM/EDS, EBSD, XRD, TEM and microhardness mapping. Calculations of the significant exothermic reaction between liquid Ni and Al are used to explain the effective homogeneity in the in situ alloyed FIMs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Composites |