| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
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| Presentation Title |
The Effect of Crystallographic Defects on the Mechanical Performance of Nano-Metamaterials |
| Author(s) |
Szu-Jia Liu, Sahar Choukir, Chandra Veer Singh |
| On-Site Speaker (Planned) |
Szu-Jia Liu |
| Abstract Scope |
Recent advances in additive manufacturing have enabled the precise fabrication of complex geometries at micro and nano scales, facilitating the creation of sophisticated mechanical metamaterials with tailored properties. However, crystallographic defects are an inevitable consequence of the fabrication process in metallic nano-metamaterials. This study employs Molecular Dynamics simulations to investigate the mechanical properties and deformation mechanisms of nanolattices comprising Kelvin, BCC, FCC, and SC struts under various relative densities. Randomly introduced vacancies assess the sensitivity of these structures to defects, while configurational entropy effects are also considered. Results indicate that bending-dominated structures are more affected by reduced relative density but exhibit greater resilience to vacancy impact on yield strength. These findings elucidate the interplay between strut structure, relative density, and defect concentration, providing valuable insights for the design and optimization of nano-metamaterials in engineering applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, High-Entropy Alloys |