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- W2330483784 abstract "Elastic properties and mechanisms for tensile yielding of fcc Al nanowires are explored using orbital-free density functional theory. We quasistatically load ultrathin nanowires that have circular cross sections, diameters 1−8 nm, lengths up to ∼20 nm, and axes along the [111] direction. We find that Young’s modulus is roughly consistent for the nanowires and bulk Al but that the equilibrium interlayer spacing, elastic limit, and yield strength are diameter dependent. Plasticity is nucleated by 3-fold symmetric axial displacements of surface atoms for all nanowires examined. However, the nanowire with 4 nm diameter yields via partial slip before achieving the theoretical strength of bulk Al, while the 1 and 2 nm nanowires yield via amorphous mechanisms, above or near the theoretical strength. These results give new insight into the plastic yielding mechanisms of ultrathin fcc nanowires with edge-free cross sections and [111] orientation." @default.
- W2330483784 created "2016-06-24" @default.
- W2330483784 creator A5063341916 @default.
- W2330483784 creator A5090200106 @default.
- W2330483784 date "2011-03-16" @default.
- W2330483784 modified "2023-09-23" @default.
- W2330483784 title "Orbital-Free DFT Simulations of Elastic Response and Tensile Yielding of Ultrathin [111] Al Nanowires" @default.
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- W2330483784 doi "https://doi.org/10.1021/jp112196t" @default.
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