Shock compression of aluminum single crystals to 70 GPa: Role of crystalline anisotropy

Abstract

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Sound Velocities in Shock‐Synthesized Stishovite to 72 GPa

“…Plate-impact experiments were carried out using a two-stage light-gas gun with a 1 ′′ (up to 5.2 km/s) or 0.5 ′′ (up to 7.1 km/s projectile velocity) diameter barrel at the Institute for Shock Physics, Washington State University (Choudhuri & Gupta, 2013). Although the water content of the samples was not measured, Corning fused silica is reported by the manufacturer to have 800-1,000 ppm OH.…”

“…Although the water content of the samples was not measured, Corning fused silica is reported by the manufacturer to have 800-1,000 ppm OH. Plate-impact experiments were carried out using a two-stage light-gas gun with a 1 ′′ (up to 5.2 km/s) or 0.5 ′′ (up to 7.1 km/s projectile velocity) diameter barrel at the Institute for Shock Physics, Washington State University (Choudhuri & Gupta, 2013). Projectile velocities were measured by a four-beam optical beam-block system with uncertainties of <0.5%.…”

Ballistic Impact Response of Al0.1CoCrFeNi High‐Entropy Alloy

“…These studies demonstrated that the mechanical properties of HEAs are highly tunable over a wide range by suitable thermomechanical treatment . Deformation of HEAs at medium to high strain rates (in the range of 10 −2 –10 3 s −1 ) using Split‐Hopkinson Pressure Bar (SHPB) indicated that the mechanism, flow stress, and strain‐hardening were significantly dependent on the strain rate . For some HEAs, a transition in deformation mechanism from dislocation slip to a mixed mode of dislocation‐slip and deformation twinning was observed by increasing strain rate from 10 −3 to 10 2 s −1 .…”

“…[14][15][16][17] Deformation of HEAs at medium to high strain rates (in the range of 10 À2 -10 3 s À1 ) using Split-Hopkinson Pressure Bar (SHPB) [2,[18][19][20][21][22] indicated that the mechanism, flow stress, and strain-hardening were significantly dependent on the strain rate. [23][24][25][26][27][28][29][30] For some HEAs, a transition in deformation mechanism from dislocation slip to a mixed mode of dislocation-slip and deformation twinning was observed by increasing strain rate from 10 À3 to 10 2 s À1 . [22,[31][32][33] Several of these HEAs also show inhomogeneous deformation in the form of serrated flow with increasing applied stress.…”

Real-Time Observation of Stacking Faults in Gold Shock Compressed to 150 GPa

“…In addition to accessing extreme thermodynamic states, shock-wave experiments are ideally suited to examine condensed-matter changes in real time (picosecondnanosecond timescales). Although the majority of past studies have involved continuum measurements (e.g., impedance matching and wave profiles) [1][2][3][4]7,8], recent experimental advances are providing real-time microscopic information through in situ, x-ray diffraction (XRD) measurements, including new insights into phenomena such as shock-induced structural transformations [9][10][11] and deformation twinning [12,13].…”