About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
Influence of Surface State on the Mechanics of Nano-objects |
Author(s) |
Hugo Iteney, Thomas Cornelius, Olivier Thomas, Jonathan Amodeo |
On-Site Speaker (Planned) |
Hugo Iteney |
Abstract Scope |
Material surface state is a key parameter in several fields such as friction or machining. At small scales, surface alteration is also known to be at the roots of major physical phenomena as in catalysis or nanomechanical engineering. In this study, we model the influence of surface roughness and oxidation on the mechanical response of metallic nanocrystals. After briefly introducing Pyrough, the tool we recently developed to design virtual samples with rough surfaces, nanocompression simulations are presented. First, our results show that surface roughness has a major impact on the mechanical properties and the dislocation microstructure evolution during plastic deformation as confirmed by a statistical analysis performed on hundreds of atomistic simulations. Second, after studying the growth of an oxide layer at the surface of FCC nanometals, the influence of an oxidized surface is accounted for the nanocrystal strength model. Our results shed new light on the mechanics of nano-objects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, |