Abstract
The influence of shock compression on the spall strengths of copper, brass, nickel, stainless steel, armco iron, and titanium nickelide Ti51.1Ni48.9 is studied in the pressure range 2–80 GPa at a strain rate higher than 104 s−1 by recording wave profiles with a VISAR laser velocimeter and subsequent analysis. The strengths of the metals subjected to strong twinning during shock compression are shown to increase with the pressure in a shock wave, and the dependence of the strength on the shock pressure has a threshold character due to thermal softening at the maximum shock wave amplitude. The metals that undergo phase transformations have a more complex relation between the spall strength and the shock compression intensity.
Published Version
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