naa a22 4500 510815413 CHVBK 20180411083504.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1134/S0031918X13050074 doi (NATIONALLICENCE)springer-10.1134/S0031918X13050074 Dislocation density in copper and tantalum subjected to shock compression depending on loading parameters and original microstructure [Elektronische Daten] [A. Podurets, M. Tkachenko, O. Ignatova, A. Lebedev, V. Igonin, V. Raevskii] The dislocation density ρ in copper and tantalum specimens with various grain size that remained after high-strain-rate loading by shock and quasi-isentropic waves with amplitudes of 20-100 GPa has been studied using X-ray diffraction analysis. The deformation rate was 106-109 s−1. It has been confirmed that high-strain-rate loading generates a higher dislocation density in copper than does quasi-static deformation, as well as that the shock-wave loading generates a higher dislocation density than quasi-isentropic loading. In copper, a maximum of ρ has been found in the pressure range of P = 30-40 GPa, which corresponds to a degree of deformation of 0.25-0.3, followed by a drop. This drop in ρ is explained by the partial annealing of defects during adiabatic heating resulting from compression. An increase in ρ in copper with decreasing specimen temperature has been noted. In tantalum, an increase in the shock wave pressure leads to a monotonic increase in the dislocation density. No effect of heating on the annealing of defects in tantalum has been found, even under the maximum pressure. As the average grain size increases, ρ increases in both copper and tantalum. Pleiades Publishing, Ltd., 2013 copper nationallicence tantalum nationallicence shock wave nationallicence dislocation density nationallicence Podurets A. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut Tkachenko M. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut Ignatova O. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut Lebedev A. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut Igonin V. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut Raevskii V. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/5(2013-05-01), 440-447 0031-918X 114:5<440 2013 114 11508 https://doi.org/10.1134/S0031918X13050074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0031918X13050074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Podurets A. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 700 1- Tkachenko M. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 700 1- Ignatova O. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 700 1- Lebedev A. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 700 1- Igonin V. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 700 1- Raevskii V. All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, pr. Mira 37, 607188, Sarov, Nizhegorodskaya oblast, Russia aut NATIONALLICENCE 773 0- The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/5(2013-05-01), 440-447 0031-918X 114:5<440 2013 114 11508 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer