Free surface velocity profiles in molybdenum shock compressed at 1400 °C
The equation of state, constitutive properties and unloading wave velocities of molybdenum have been determined from free surface velocity profiles on samples shock compressed from a 1400 °C initial state. The equation of state of 1400 °C molybdenum agrees with previous streak camera measurements and the combined equation of state between 12 and 96 GPa is: U_S =4.78 (0.02)+1.42 (0.02)u_p . Unloading wave velocities measured between 12 and 81 GPa range from 6.30 to 7.91 km/s and are 4–8% below extrapolated 25 °C compressional velocities. The yield strength, Y, was found to be 0.79–0.94 GPa, compared with values of 1.3–1.6 GPa from ambient‐temperature experiments.
© 1994 American Institute of Physics. Published online 10 July 1994. We thank L. Rowan, E. Gelle, M. Long for experimental assistance and M. Furnish for providing us with copies of his data. We also thank L. S. Durango for editorial assistance. This work was supported by the NSF. Division of Geological and Planetary Sciences, California Institute of Technology contribution 5290.
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