Dynamics of deformation bands initiated by impact of an indenter on the surface of aluminum-magnesium alloy

A. A. Shibkov, A. E. Zolotov, A. A. Denisov, M. F. Gasanov

Tambov State University named after G.R. Derzhavin, Tambov, Russia

Abstract: The dynamics of macrolocalized deformation bands generated by the impact of a Vickers indenter on the surface of an AlMg6 aluminum-magnesium alloy deformed under creep conditions was studied by high-speed video recording and acoustic emission methods. It has been established that these bands are the trigger for the development of a macroscopic jump in plastic deformation on the creep curve. It is shown that in alloys exhibiting the Portevin–Le Chatelier effect it is necessary to take into account the initiation and propagation of deformation macrobands during surface erosion damage and to estimate the volume and morphology of the plastic zone during impact microindentation of a deformable alloy.

Keywords: intermittent deformation, deformation band, impact, indenter, aluminum-magnesium alloy.

Received: 21.04.2022
Revised: 21.04.2022
Accepted: 31.05.2022

DOI: 10.21883/PJTF.2022.14.52866.19228

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