The formation of a quasi-periodic surface profile by means of dislocation slip

E A Alfyorova ,Д В Лычагин ,D V Soprunov

doi:10.1088/1742-6596/803/1/012002

Abstract

This work presents the experimental results concerning the research of the morphology of the face-centered cubic (FCC) single crystals surface after compression deformation. Our aim is to identify the method of forming a quasiperiodic profile of single crystals with different crystal geometrical orientation. A set of modern methods as optical and confocal microscopy is applied. It is done to determine the morphology of surface parameters. The results show that the octahedral slip is an integral part of the formation of quasiperiodic profile surface and is starting with the initial strain. We present values of shear quantity directly in shear traces, meso- and macrobands and in shear tracks shift within them. The similarity of the process of surface profile forming at different levels of scale is given.Finally, we suppose that octahedral slip is the main way to form quasiperiodic deformation relief. We compare our results to published data and identify common regularities for various metal FCC single crystals with different deformation methods. The experimental results presented can be used for mathematical modeling of plastic deformation.

Highlights

Changes in topology of solid surface after deformation are of interest to researchers from various branches of science for many years
The experimental data and results of mathematical models indicate that folding, wrinkling, extrusion and intrusion, checkerboard distribution regions, etc. are frequent and appear in a variety of load conditions. This process is typical for the poly- and single crystals, the folds can be observed in geology and metal forming
The results of finite element modeling of the emergence of roughness during plastic deformation of polycrystalline aluminum are given in article [1]

Summary

Introduction

Changes in topology of solid surface after deformation are of interest to researchers from various branches of science for many years. Are frequent and appear in a variety of load conditions. The experimental data and results of mathematical models indicate that folding, wrinkling, extrusion and intrusion, checkerboard distribution regions, etc. This process is typical for the poly- and single crystals, the folds can be observed in geology and metal forming. The results of finite element modeling of the emergence of roughness during plastic deformation of polycrystalline aluminum are given in article [1]. Article [2] represents the experimental data which show that the size and orientation of the grain influence roughness during plastic deformation. There is a quasi-periodic surface profile after the deformation

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