Hugoniot elastic limit and spall strength of aluminum and copper single crystals over a wide range of strain rates and temperatures.

S.V. Razorenov1, G.I. Kanel2, K. Baumung3, H. Bluhm3, and J. Singer3

1Institute for Chemical Physics Research. Chernogolovka,142432 Russia.

2Institute for High Energy Densities. IVTAN, Izhorskaya 13/19, Moscow, 127412 Russia

3Forschungszentrum Karlsruhe, Germany.

Abstract. Anomalous rise of the Hugoniot elastic limit (HEL) with increasing temperature was observed for aluminum and copper single crystals. Within the temperature range from 20° C to 650° C the HEL of aluminum single crystals increased from 0.12 to 0.96 Gpa for 3 mm thick samples and to 3 GPa for ~0.25 mm thick samples. The spall strength decreased from 2.3 GPa and 3.2 GPa at room temperature to 1.3 GPa and 2.2-3 GPa near the melting temperature for thicker and thinner samples, respectively. For copper single crystals a HEL of 2.5 GPa was recorded at 833° C; whereas the spall strength decreased from 5.4 GPa at room temperature to 4.8 GPa at 485° C.




Als Vortrag:

12th APS Conference on Shock Compression of Condensed Matter, Atlanta, Georgia,

June 24-29, 2001