Abstract
The Hugoniot of preheated metal is related with its principal Hugoniot by means of the Grüneisen equation of state and the Rankine-Hugoniot equation. Modeling calculations show that the preheating lowers to a certain extent the shock impedance. The evaluated Hugoniot of preheated Mo is comparable with the available experimental data. Hugoniots of 6061-T6 Al flyers of different preheat temperatures in reported Hugoniot experiments on Z pinch [Knudson et al., J. Appl. Phys. 94, 4420 (2003)] are calculated, and the determined shock states of 6061-T6 Al using the impedance-match method are consistent with the reported results. This approach allows a reasonable evaluation for Hugoniot of the preheated metal mainly from its principal Hugoniot.
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