| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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| Presentation Title |
Mechanical Behavior of Additively Manufactured Metals at Nanoscale: from Pillars to Architectures |
| Author(s) |
Wenxin Zhang, Zhi Li, Julia R. Greer |
| On-Site Speaker (Planned) |
Wenxin Zhang |
| Abstract Scope |
Nanomechanical studies of conventional, subtractively manufactured metals with single-crystalline, nano-crystalline, and/or nano-porous microstructures have demonstrated size-dependent mechanical strengths associated with individual microstructural features and their corresponding plasticity mechanisms. In the present study, we showcase that two photon lithography-based, nanoscale hydrogel-infusion additive manufacturing allows for the direct fabrication of fcc-Ni pillars and architectures (structural feature sizes ranging ~ 100-500 nm) comprising of a hierarchical nano-crystalline, nano-porous microstructure. Via in situ compression experiments and molecular dynamics simulations, the nanopillars demonstrated high yield strengths of up to ~ 3 GPa, the interplay between various deformation mechanisms, and suppressed size dependence. Subsequent investigations of beam- and shell-based nano-architectures, via in situ experiments and finite element analysis (using experimentally measured nanopillar properties), shed light on the microstructural defect-driven size-dependent mechanical behaviors in the submicron size-sensitive regime of fcc-Ni, bridging the two hierarchical levels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Modeling and Simulation |