Shock response of cobalt-based cemented tungsten carbides at pressures up to 100 GPa

Wang, Bingsen; Prakash, Vikas

doi:10.1063/12.0020355

Shock response of cobalt-based cemented tungsten carbides at pressures up to 100 GPa

Journal Article · Tue Sep 26 00:00:00 EDT 2023 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/12.0020355· OSTI ID:2376169

Wang, Bingsen ^[1]; Prakash, Vikas ^[2]

Washington State University, Pullman, WA (United States); Institute for Shock Physics, Washington State University
Washington State University, Pullman, WA (United States)

In the present study, shock wave experiments are conducted on General Carbide cemented tungsten carbides with 3.7 wt.% and 6.0 wt.% cobalt binder to determine their shock compression response up to 100 GPa. A three-stage particle velocity profile is observed in the experiments -- an initial elastic-rise to the Hugoniot elastic limit (HEL), an elastic-plastic ramp indicating post-yield hardening, and finally a rise to the peak shocked Hugoniot state. The results of the experiments are used to determine the HEL, shock velocity (U_s) vs. particle velocity (u_p) Hugoniot relationship, and the longitudinal stress vs. specific volume Hugoniot relationship for the two samples. Here, the HEL for the WC 3.7wt% Co and WC 6.0wt% Co samples was determined to be ~4.45 GPa and 3.72 GPa, respectively. The U_s – u_p relation was determined to be U_s = 4.97(0.006)+1. 446 (0.018) u_p for WC 3.7 wt.% Co and U_s = 4.93(0.006)+1. 454(0.017)u_p for the WC 6.0 wt.% Co sample at peak particle velocities>0.75 km/s. For both WC grades, in the particle velocity regime less than ~0.75 km/s, the measured shock wave velocities were found to be larger than those predicted by the linear U_s–u_p Hugoniot relationship, indicating the two WC samples to preserve substantial strength in the post-yield deformation regime. Both WC grades show a catastrophic drop in shear stress carrying capacity when shocked to longitudinal stresses greater than ~70 GPa.

View Accepted Manuscript (DOE)

Research Organization:: Washington State University, Pullman, WA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)

Grant/Contract Number:: NA0003957

OSTI ID:: 2376169

Journal Information:: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Vol. NA; ISSN 0094-243X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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