Abstract
It is shown that preloading of fine-grained copper with a the grain size of 0.5 m by a shock wave of intensity ≈25–50 GPa does not lead to changes in its internal microstructure and mechanical properties, and the dislocation density increases only slightly from 1.8 · 1011 cms-2 in the initial state to (3.1–3.6) · 1011 cms-2 after shockwave loading. An increase in shock wave intensity to pressures > 55 GPa leads to a decrease in the dislocation density to 2.5 · 109 cms-2, an increase in the grain size to ≈19 fum, the occurrence of microtwins inside the grains, and a reduction in the mechanical properties of fine-grained copper to the level of coarse-crystalline copper.
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Translated from Fizika Goreniya i Vzryva, Vol. 46, No. 6, pp. 119–124, November–December, 2010.
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Ignatova, O.N., Kaganova, I.I., Malyshev, A.N. et al. Effect of shock-wave loading on the internal microstructure and mechanical properties of fine-grained copper. Combust Explos Shock Waves 46, 719–723 (2010). https://doi.org/10.1007/s10573-010-0096-3
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DOI: https://doi.org/10.1007/s10573-010-0096-3