Investigation of Acoustic Emission Produced by Individual Structural Defects in FCC Lattice

AY Nikonov and AM Zharmukhambetova, PROCEEDINGS OF THE ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES, 2051, 020215 (2018).

DOI: 10.1063/1.5083458

In the paper simulation of the indentation of copper crystal was carried out using the method of molecular dynamics. We investigated the effect of dislocations on the acoustic emission under the impact of a single element (indenter) with a certain amount of material. Forces acting on the sensor and internal structure of sample were analyzed. According to the results, a significant change in the signal is associated with the emergence of dislocations on the sample surface. The development of plastic deformation in the volume of the sample also leads to a change in the acoustic signal, which is shown by the results of the Fourier analysis.

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