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

Abstract:

The substructure evolution was observed in the range of scales from dozens nanometers to millimeters on the surface of the aluminum single crystalline plates under restricted cyclic tension. The self-similar systems of crossing bands that create the grid-like ordered structures on different scales are assumed to be clear manifestation of their self-organization. The selforganization of these grid-like structures is assumed to be inevitably related to the crystal structure defects (dislocations, point-like defects and their ensembles). The model is proposed for explanation of 2-dimensional rectangular "tweed" and 3-dimensional rhombic "pullover" pattern formations which are related to cooperative arrangement of crystal structure defects.

• Periodical: Materials Science Forum (Volumes 567-568)
• Pages: 421-424
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.567-568.421
• Online since: December 2007
• Authors: Yuri Gordienko, Pavel V. Kuznetsov, Elena Zasimchuk, Rimma Gontareva, Jürgen Schreiber, Vladimir Karbovsky
• Keywords: Aluminum (Al), Cyclic Deformation, Ductile Fracture, Macroscale, Microscale, Nanoscale, Self-Organization, Self-Similarity, Strain Localization, Sub-Microscale, Surface Evolution

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