Shock Compression of the New 47Zr45Ti5Al3V Alloys up to 200 GPa

Shock compression experiments on a new kind of 47Zr45Ti5Al3V alloys at pressures between 28 and 200 GPa are performed using a two-stage light gas gun. The Hugoniot data are obtained by combining the impedance-match method and the electrical probe technique. The relationship between the shock wave velocity U_s and particle velocity u_p can be described linearly by U_s=4.324(±0.035) +1.177(±0.012) u_p. No obvious evidence of phase transition is found in the shock compression pressure range. The calculated U_s?u_p relationship obtained from the additive principle is different from the experimental data, indicating that the α→β phase transition occurs below 28 GPa. The Grüneisen parameter γ obtained from the experimental data can be expressed by γ=1.277(ρ₀/ρ). The zero-pressure bulk modulus B_0s=97.96 GPa and its pressure derivative B'_0s=3.68. The P–V–T equation of state for 47Zr45Ti5Al3V is given using the Vinet equation of state to describe the cold curve and the Debye model for the thermal contributions.