Abstract
The distribution of dislocations and twins over the cross section of shock-loaded copper and 18Cr-10Ni-Ti steel specimens is investigated experimentally and numerically. It is found that the volume fraction of twins near the loaded surface and a spall crack is an order of magnitude higher than their fraction at the center of the target. The features of twins arising in different parts of the target are discussed. A model of a twinning mechanism in coarse-grained metals is proposed and used for numerical simulation of the dislocation and twin depth distribution in shock-loaded targets. It is shown that in thin targets (less than 1 mm thick), the distribution of twins can be even more uniform than the distribution of the dislocations density.
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Original Russian Text © E.N. Borodin, S.A. Atroshenko, A.E. Mayer, 2014, published in Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 84, No. 8, pp. 59–66.
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Borodin, E.N., Atroshenko, S.A. & Mayer, A.E. Distribution of dislocations and twins in copper and 18Cr-10Ni-Ti steel under shock-wave loading. Tech. Phys. 59, 1163–1170 (2014). https://doi.org/10.1134/S1063784214080076
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DOI: https://doi.org/10.1134/S1063784214080076