Shock adiabats of metals with different initial volumes and pressures have been calculated with the use of multiphase equation of state. The stability of shock wave has been investigated using the known criteria. We found two types of instabilities occurring in the vicinity and inside two-phase liquid-gas region. They are the specific sound instability arising as a spontaneous sound emission from the shock discontinuity and two-wave configuration. The position of the instability region and its dependence on initial pressure and volume has been analyzed. Discussed are regularities obtained for 30 metals.

Topics
Phase transitions, Shock compression, Acoustical properties, Shock waves, Speed of sound, Entropy, Equations of state, Wave mechanics, Transition metals, Chemical elements
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© 2008 American Institute of Physics.
2008
American Institute of Physics
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