About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior at the Nanoscale VI
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Presentation Title |
Mechanical Behavior of Free-standing and Matrix-embedded Metallic Nanoparticles at Different Temperatures |
Author(s) |
Alla Ndiaye Dieng, Louise Grau, Celine Gerard, Jean-Claude Grandidier |
On-Site Speaker (Planned) |
Alla Ndiaye Dieng |
Abstract Scope |
Nano-composite materials represent a tremendous opportunity for improving mechanical properties and/or multi-physics coupling. Nevertheless, the understanding of their deformation mechanisms is still limited, especially at lower scales.
Few studies have already investigated the mechanical behavior of free-standing nanoparticles at room temperature (Bian et al 2013, Salah et al. 2017, Kilymis et al 2018, for instance).
In the present work, we investigate both free-standing and embedded within a matrix nanoparticle behavior by the means of molecular dynamics simulations. Uniaxial compressions are performed on 20nm-sized nanoparticles. The impact of the force field model is first studied on aluminum nanospheres.
The Ni3Al nanoparticle mechanical behavior is then investigated through a large spectrum of temperature. The plastic deformation mechanisms are analyzed in details both for free-standing and embedded in a Ni matrix nanoparticles. The effect of nanoparticle shape, crystallographic orientation or temperature on plasticity mechanisms and yield stress are discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Computational Materials Science & Engineering, |