The mechanical response of pre-strained [100] aluminium single crystals under plane impact

New data have been obtained on the resistance to high-strain rate and fracture of a [100] aluminum single crystal under plane impact loading. The evolution of the elastoplastic compression wave, the Hugoniot elastic limit, and the spall strength of samples in the states before and after pre-starined of 0.6%, 5.5%, and 10.5% were measured. Pre-strain was carried out by compression on a hydraulic press. Shock loading was carried out on an air gun with simultaneous recording of wave profiles $u_{fs}(t)$ using a VISAR laser interferometer. The maximum shock compression pressure did not exceed 4 GPa. It was found that pre-strain by 0.6% and the associated change in the defectiveness of the structure, changes the kinetics of deformation and reduces the value of the Hugoniout elastic limit. Increase in the amount of pre-strain to 5.5% and 10.5% leads to an insignificant increase in the Hugoniout elastic limit relative to the samples without deformation. The compression rate in a plastic shock wave does not depend on the state of single crystals. Pre-strain does not affect the spall strength. Based on the results of measurements, dependences of decay elastic precursor on the thickness of the samples and rate dependences of the spall strength were plotted in the range of 10$^5$–10$^6$ s$^{-1}$.