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

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:

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

June 24-29, 2001