| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-45: Multiscale Microstructure and Mechanical Characterization of Cu-Ni Alloys Produced through Hydrogel Infusion-based Additive Manufacturing (HIAM) |
| Author(s) |
Thomas T. Tran, Rebecca A. Gallivan, Julia R. Greer |
| On-Site Speaker (Planned) |
Thomas T. Tran |
| Abstract Scope |
Hydrogel infusion-based additive manufacturing (HIAM) is a novel process for structuring metallic alloys at the micro- and nanoscales using hydrogen-based direct reduction of nanoporous oxides rather than local melt pool solidification. Using a suite of chemical and structural characterization including electron back scatter diffraction and transmission electron microscopy, we show that CuxNi1-x alloyed by HIAM form fine, equiaxed fcc grains with high densities of annealing twins and coincident lattice site boundaries comparable to strain recrystallized alloys. We also provide evidence the gas-solid reaction in HIAM and subsequent phase transformations can result in observed residual oxide crystallites containing coherent nuclei of reduced alloy. Nanoindentation and micropillar compression results further highlight the role of this multiscale microstructure in strengthening HIAM CuNi locally and in the bulk. Through discussion of the binary alloys’ microstructural evolution, composition-independent hardening, and suppressed size effects, this work provides new insight into the process-structure-property relationship in HIAM alloys. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Mechanical Properties |