Deformation Microstructure of a Copper Single Crystal after Loading by Spherically Converging Shock Waves


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Abstract

A layer by layer study of the structure of a 34-mm ball of a copper single crystal after loading by spherically converging shock waves has been performed using transmission electron microscopy. The deformation microstructure along directions \(\left\langle {100} \right\rangle \) and \(\left\langle {110} \right\rangle \) has been studied. It has been revealed that the character of the deformation microstructure substantially depends on both the direction of the shock-wave propagation and on the depth of the layer location in the sample. In the near-surface layers of the ball that are located perpendicular the \(\left\langle {100} \right\rangle \) direction, a well-pronounced cellular dislocation structure is present; in the layers located perpendicular to the \(\left\langle {110} \right\rangle \) direction, no formation of the cellular structure occurs; there is only a high density of homogeneously distributed dislocations. Regardless of the single-crystal orientation, microbands, microtwins, banded structures, and recrystallized grains are detected along with the dislocations. Dislocation vacancy loops are observed in all layers of the ball.

About the authors

A. V. Dobromyslov

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: Dobromyslov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

N. I. Taluts

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: Dobromyslov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

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