The strength of single crystal copper under uniaxial shock compression at 100 GPa

WJ Murphy and A Higginbotham and G Kimminau and B Barbrel and EM Bringa and J Hawreliak and R Kodama and M Koenig and W McBarron and MA Meyers and B Nagler and N Ozaki and N Park and B Remington and S Rothman and SM Vinko and T Whitcher and JS Wark, JOURNAL OF PHYSICS-CONDENSED MATTER, 22, 065404 (2010).

DOI: 10.1088/0953-8984/22/6/065404

In situ x-ray diffraction has been used to measure the shear strain (and thus strength) of single crystal copper shocked to 100 GPa pressures at strain rates over two orders of magnitude higher than those achieved previously. For shocks in the 001 direction there is a significant associated shear strain, while shocks in the 111 direction give negligible shear strain. We infer, using molecular dynamics simulations and VISAR (standing for 'velocity interferometer system for any reflector') measurements, that the strength of the material increases dramatically ( to similar to 1 GPa) for these extreme strain rates.

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