Two‐Dimensional Rectangular and Three‐Dimensional Rhombic Grids Created by Self‐Organization of Random Nanoextrusions

Abstract

Nanoextrusions on single crystalline Al and Al‐Mg plates under constrained cyclic tension evolve from random arrangements to regular 2D surface rectangular grid (“tweed” – A) and through gradual evolution (B) to 3D porous rhombic grid of voids (“pullover” – C). The “tweed” spacing can be decreased by loading frequency and alloy content, that could allow for the new mechanically driven method for micro and sub‐micro fabrication of 2D and 3D electronic devices.

From Quantity To Quality: Massive Molecular Dynamics Simulation of Nanostructures under Plastic Ddeformation in Desktop and Service Grid Distributed Computing Infrastructure

“…This indicates availability of the linked local zones (parts of "chain") in nanocrystals with hydrodynamic plastic flow that occurs as the collective motion of defects and their aggregates (atom-vacancy states or SFs) in the weak link with the power law (scale-invariant or fractal) basic distribution of the defect concentration over the links of the chain [19,27]. As a result of this study, the change of the plastic deformation mechanism was revealed in Al nanocrystals with <011>{011} and <010>{010} orientations under conditions of localized plastic deformation: from the uniform laminar flow (based on easy dislocation slip) to the inhomogeneous localized (hydrodynamic) mechanism (based on the correlated movements of groups of atoms, or highly excited atom-vacancy states), which is in good correlation with our previous experimental studies [13,18,12].…”

“…From a physical point of view the work was motivated by the previous results [13,12,24] that single crystal aluminum foil under the influence of compressed cyclic stretch revealed macro-and micro-scale evolution of crystalline defects in bulk and on surface. Such defect evolution demonstrates several signs of self-similar geometry and self-organized behavior [31,8], that was analyzed by several idealized models [14,17,16,15].…”

Multiscale 2D Rectangular and 3D Rhombic Gratings Created by Self-Organization of Crystal Structure Defects under Constrained Cyclic Deformation and Fracture

“…The initial state of the Al plates was investigated by optical microscopy, atomic force microscopy (AFM), X-ray diffraction, and high-precision white light phase shifting interferometry (WLPSI) (Veeco white light interferometer) [8]. The careful preparation of the single crystalline Al plates was performed, because it is necessary to avoid the well-known honeycomb and band pattern formation on an Al surface after long electropolishing [9,10].…”

Heterogeneous Pattern Formation at Aluminum Surface — Fourier, Morphology and Fractal Analysis

“…Recently the evolution of single crystalline Al under constrained cyclic mechanical tension was found [1][2][3]. The Al surface undergoes the sharp transition from initially solid flat state to the macroscopic band-like pattern, and then to the more pronounced lattice microscopic substructure [4][5]. The plates are used for estimation of deformation damage and fracture at places with a priori known homogeneous and heterogeneous strain distribution (Fig.…”