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Acoustic wave correlation of elementary deformation events in a low-stability crystal lattice of FCC-metals S. V. Makarov, V. A. Plotnikov, A. I. Potekaev, L. S. Grinkevich

Contributor(s): Makarov, Sergey V | Potekaev, Aleksandr I, 1951- | Grinkevich, Larisa S, 1969-2019 | Plotnikov, V. A | Томский государственный университет Высшая школа бизнеса Отделение банковского дела | Томский государственный университет Сибирский физико-технический институт Научные подразделения СФТИMaterial type: ArticleArticleSubject(s): ГЦК-металлы | акустическая эмиссия | акустические волны | деформацияGenre/Form: статьи в журналахOnline resources: Click here to access online In: Russian physics journal Vol. 57, № 12. P. 1676-1682Abstract: A discrete pattern of the low-frequency acoustic emission spectrum under conditions of high-temperature plastic deformation of aluminum is analyzed. It is attributed to re-distribution of vibrational energy of the primary acoustic signal over resonant vibrations of standing waves of the resonators. In a low-stability crystal medium, standing-wave oscillations initiate elementary deformation displacements in a certain material volume. The linear dimensions of this volume are related to the length of the standing wave, thus determining the macroscopic scale of correlation. The correlated deformation displacements in turn generate acoustic signals, whose interference results in the formation of a single acoustic signal of abnormally high amplitude. In a low-stability state of the crystal lattice, activation of the elementary plastic shears could result from a combined action of static forces, thermal fluctuations and dynamic forces of standing acoustic waves.
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Библиогр.: 23 назв.

A discrete pattern of the low-frequency acoustic emission spectrum under conditions of high-temperature plastic deformation of aluminum is analyzed. It is attributed to re-distribution of vibrational energy of the primary acoustic signal over resonant vibrations of standing waves of the resonators. In a low-stability crystal medium, standing-wave oscillations initiate elementary deformation displacements in a certain material volume. The linear dimensions of this volume are related to the length of the standing wave, thus determining the macroscopic scale of correlation. The correlated deformation displacements in turn generate acoustic signals, whose interference results in the formation of a single acoustic signal of abnormally high amplitude. In a low-stability state of the crystal lattice, activation of the elementary plastic shears could result from a combined action of static forces, thermal fluctuations and dynamic forces of standing acoustic waves.

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