This article is cited in 3 papers

Metals

Investigation of the effect of electric current on serrated deformation and acoustic emission in the aluminum-magnesium alloy 5056

A. A. Shibkov, A. A. Denisov, M. A. Zheltov, A. E. Zolotov, M. F. Gasanov, V. I. Ivolgin

Tambov State University named after G.R. Derzhavin

Abstract: The effect of direct electric current on the serrated deformation of the aluminum-magnesium alloy 5056 has been studied using the acoustic emission method and high-speed video filming of propagating deformation bands. The phenomenon of the electric current-induced suppression of low-frequency acoustic emission signals has been revealed in the range of 1 Hz–2 kHz, which is connected with the development of Portevin-Le Chatelier deformation bands. The characteristic times of damping and growth of plastic instabilities and acoustic signals caused by them after current turn-on and turn-off, respectively, have been estimated.

Received: 17.11.2014

 English version: Physics of the Solid State, 2015, 57:6, 1060–1066

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