Kinetics of Zr under shock-ramp compression

Abstract

<p indent=0mm>The dynamics of Zr under shock-ramp wave loading was studied with experiments and simulations. The shock-ramp wave compression experiments of Zr with different loading thermodynamics path were carried out with photonic Doppler velocimetry (PDV) and compact pulsed power generator CQ-4. The velocity wave profiles show that Zr undergoes shock and then ramp wave compression in the loading section. When the shock pressure reaches about <sc>10 GPa,</sc> the velocity profile contains phase transition information. However, the phase transition information could not be observed when the shock pressure is up to <sc>25 GPa.</sc> It is a single shock wave when the shock pressure is at <sc>44 GPa.</sc> The experimental results are simulated with the Hayes multi-phase equation of state and the non-equilibrium phase transition kinetic model, which can well describe the physical processes of the elastoplastic transition and the phase transition in the loading section.