TY - GEN
T1 - Strength effect on the Hugoniot-compression curves of some metals (Cu, W and Au)
AU - Oka, Keiichi
AU - Mashimo, Tsutomu
AU - Gomoto, Yuya
AU - Takashima, Hideyuki
AU - Liu, Xun
AU - Nagayama, Kunihito
AU - Zaretsky, Eugene
PY - 2013/6/1
Y1 - 2013/6/1
N2 - To derive true EOS of matter from the Hugoniot data or to discuss the
Grüneisen parameter, we need the precise Hugoniot data, and must
access the strength under shock compression to draw the hydrostatic
compression curve. For this, we have refined the measurement facility
and analysis procedure. The measurement accuracy of Hugoniot data had
increased by constructing the high-time resolution streak photographic
system consisting of rotating-mirror type streak camera and pulsed dye
laser, and considering the effects of impact inclination. The Hugoniot
data of copper (Cu) and tungsten (W) were measured in the pressure range
up to >200 GPa by the symmetric-impact experiment using a one-stage
powder gun and two-stage light gas gun. It was found that the
zero-intercept values (C0) of US-UP
relation (Us =C0 + SUp) of Cu and W were larger than the bulk
sound velocities (3.867 and 4.023 km) by 0.14 and 0.13 km/s,
respectively, which showed the effect of shear strength in plastic
region. The hydrostatic-compression curves were drawn using the strength
values reported by Chhabildas et al., and the equation of state (EOS)
parameters were discussed. The result on gold (Au) will be also
presented at the conference.
AB - To derive true EOS of matter from the Hugoniot data or to discuss the
Grüneisen parameter, we need the precise Hugoniot data, and must
access the strength under shock compression to draw the hydrostatic
compression curve. For this, we have refined the measurement facility
and analysis procedure. The measurement accuracy of Hugoniot data had
increased by constructing the high-time resolution streak photographic
system consisting of rotating-mirror type streak camera and pulsed dye
laser, and considering the effects of impact inclination. The Hugoniot
data of copper (Cu) and tungsten (W) were measured in the pressure range
up to >200 GPa by the symmetric-impact experiment using a one-stage
powder gun and two-stage light gas gun. It was found that the
zero-intercept values (C0) of US-UP
relation (Us =C0 + SUp) of Cu and W were larger than the bulk
sound velocities (3.867 and 4.023 km) by 0.14 and 0.13 km/s,
respectively, which showed the effect of shear strength in plastic
region. The hydrostatic-compression curves were drawn using the strength
values reported by Chhabildas et al., and the equation of state (EOS)
parameters were discussed. The result on gold (Au) will be also
presented at the conference.
M3 - Conference contribution
BT - Topical Conference on the Shock Compression of Matter 2013
ER -