Physics of the Solid State
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- 2022
In situ diagnostics of the deformation-induced surface evolution of polycrystalline copper during plastic flow
Yasnikov I. S.
1, Agletdinov E. A.
1, Danyuk A. V.
1
1Togliatti State University, Togliatti, Russia
Email: yasnikov@phystech.edu, aeinar7@gmail.com, alvdan@mail.ru
The paper presents an experimental implementation of a technique for diagnosing the surface of a polycrystalline copper sample during its plastic flow using an optical profilometer based on the principle of scanning white light interferometry (SWLI) and fractal dimension (self-similarity structure) analysis. A distinctive feature of the presented method is the deformation of the sample using a compact tensile testing machine with a mechanism for opposite stroke traverses, which reduces any displacement of test area of the sample in observation field of scanning white light interferometer during testing. This was provide to mine data of the same surface area during deformation and avoid a number of experimental artifacts. From the experimental data, the values of the fractal dimension were obtained using various modern computational methods, and possible correlations between the experimental data obtained in this work and the data of other researchers were indicated. Keywords: plastic flow, fractal dimension, self-similar structures, polycrystalline copper, dislocation, fractals, scanning white light interferometry, opposite movement of traverses.
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