About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
D-32: Mechanical Behavior of Additively Manufactured Metallic Nanolattices |
Author(s) |
Wenxin Zhang, Julia R Greer |
On-Site Speaker (Planned) |
Wenxin Zhang |
Abstract Scope |
While metal nanopillar mechanics have been vastly studied with experiments, metal lattices with submicron beam dimensions have been scarcely explored due to difficulties in free-form fabrication of metals at the nanoscale. Overcoming the challenges via two-photon lithography and hydrogel infusion-based post-processing, we produced nickel nano-architectures at submicron resolutions. At the structural building-block level, we examined monolithic Ni nanopillars (D~130-330nm) to be nanocrystalline, nanoporous, and having weakly size-dependent yield stress ~2-3 GPa. Subsequently, we investigated beam- and shell-based Ni nanolattices with ~1-2µm unit-cell sizes and feature sizes comparable to the nanopillar diameters. We performed in-situ compression, observing brittle deformation and high ultimate strengths ~100-200 MPa at <30% relative density. On-going efforts focus on distinguishing the influence of microstructure on mechanical behaviors at the building-block vs. architecture level. We anticipate the present work provides insights into the microstructure-driven mechanical behavior of Ni at different structural hierarchies in the submicron size-sensitive regime. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |