Abstract
The results of stress wave measurements under shock-wave loading of specimens of zirconium alloy W110 of thickness from 0.5 to 8 mm at normal and elevated temperatures are presented. The duration of shock loading pulses varied from ∼0.05 to 1 µs with amplitude from 3.4 to 23 GPa. The free surface velocity profiles were registered by interferometric velocimeters VISAR and PDV with nanosecond time resolution. The results of measurement of the elastic precursor decay were used to determine the plastic strain rate behind its front, which decreases from 106 s−1 at a distance of 0.46 mm to 2 × 104 s−1 at a distance of 8 mm in the course of propagation. The spall strength values at normal and elevated temperatures were obtained, and its dependencies on the strain rate in the range from 105 to 106 s−1 were constructed. The three-wave configuration of the shock wave caused by the polymorphic transformation as α → ω was registered under a shock compression pressure of 10.6 GPa.
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