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

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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.

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Correspondence to A. A. Shibkov.

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Original Russian Text © A.A. Shibkov, A.A. Denisov, M.A. Zheltov, A.E. Zolotov, M.F. Gasanov, V.I. Ivolgin, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 6, pp. 1046–1051.

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Shibkov, A.A., Denisov, A.A., Zheltov, M.A. et al. Investigation of the effect of electric current on serrated deformation and acoustic emission in the aluminum-magnesium alloy 5056. Phys. Solid State 57, 1060–1066 (2015). https://doi.org/10.1134/S106378341506030X

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  • DOI: https://doi.org/10.1134/S106378341506030X

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