title: Ultrafast dynamic compression technique to study the kinetics of phase transformations in bismuth.
abstract: Preheated Bi (296-532 K) was ramp compressed with 15-35 ns rise times to a peak stress of approximately 11 GPa to explore structural phase-transformation kinetics under dynamic loading conditions. At high strain rates, epsilon[over ]>5 x 10;{6} s;{-1}, deviation from equilibrium phase boundaries suggests that compression time scales are comparable to the new phase incubation period. The dependence of DeltaP/kT on epsilon[over ] is consistent with a thermally activated transformation.
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
authors.forename: R F
authors.initials: RF
authors.lastname: Smith
authors.forename: J H
authors.initials: JH
authors.lastname: Eggert
authors.forename: M D
authors.initials: MD
authors.lastname: Saculla
authors.forename: A F
authors.initials: AF
authors.lastname: Jankowski
authors.forename: M
authors.initials: M
authors.lastname: Bastea
authors.forename: D G
authors.initials: DG
authors.lastname: Hicks
authors.forename: G W
authors.initials: GW
authors.lastname: Collins