About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Interface Structure and Properties: Impact on Microstructure Evolution
|
| Presentation Title |
Bringing Metallurgy to the 21st Century:
Multiscale Microstructural and Mechanical Characterization of Additively Manufactured Metallic Alloys |
| Author(s) |
Julia R. Greer, Thomas Tran, Rebecca A Gallivan |
| On-Site Speaker (Planned) |
Julia R. Greer |
| Abstract Scope |
Hydrogel infusion-based additive manufacturing (HIAM) is a solid-state processing pathway that allows 3D-structuring of ceramics and alloys with micro-scale precision. Using thermal treatments of 3D-printed metal ion-infused gels, this process generates intricate microstructures. Through investigation of HIAM-produced CuxNi1-x alloys, substantial grain growth after reduction is shown to drive the formation of numerous annealing twins and entrap unreduced oxide nano-inclusions, resulting in hierarchical composite microstructures. These features elevate the average nanoindentation hardnesses by up to 4x that of bulk annealed CuxNi1-x. Uniaxial compression of micro- and nano-pillars milled from individual grains reveals composition dependence on the “smaller is stronger” size effect. This compositional dependence of deformation mechanisms arises from changes in reduction kinetics, which influence the density of inclusions and voids developed by HIAM process. This work highlights rich microstructural landscape accessible to HIAM-produced alloys and provides a pathway for characterization and tuning of mechanical performance in additively manufactured alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Nanotechnology, Mechanical Properties |