About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Decoupling the Effect of Nanoscale Geometry and Internal Microstructure on the Mechanics of Nanoporous Pt |
Author(s) |
Ankit Gupta, Timothy Ibru, Antonia Antoniou, Garritt J. Tucker |
On-Site Speaker (Planned) |
Garritt J. Tucker |
Abstract Scope |
Nanoporous (NP) metals present added behavioral complexity arising from nanoscale. Existing scaling laws prove insufficient in explaining their mechanical behavior. In this study, the mechanical response of NP Pt is investigated through a combined computational/experimental effort unraveling the role of nanoscale geometry and internal microstructure. Atomistic NP Pt structures are first created. Internal microstructures of these structures are varied from nanocrystalline to a single-crystal without affecting the geometry. In order to separate nanoscale effects, the atomistic NP structures are scaled and printed in polymer using the SLS 3D printing technique at macro level. Macroscale porous structures with random foam geometry, but same polymer material, are also 3D printed and mechanically tested. The scaling laws of mechanical properties of porous materials are studied as function of density while individually varying their internal microstructure and geometry. The findings are explained in terms of strain accommodation in junctions, ligaments and nanoscale deformation mechanisms. |
Proceedings Inclusion? |
Planned: |