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Published February 2022 | public
Journal Article

Inelastic behavior of tungsten carbide at high pressures


Tungsten carbide (WC) is commonly used in plate impact experiments for generating high pressures due to its combination of high impedance and high strength. In pressure-shear plate impact (PSPI) experiments, WC is used as anvil plates, which sandwich a thin sample of the material of interest. At pressures up to its HEL (∼5 GPa), an elastic response may be assumed for the anvil plate, enabling a straightforward analysis to extract the shear strength of the material. At higher pressures, exceeding the HEL, the inelastic behavior of WC must be taken into account to extract the shearing resistance of the material of interest. We report the results of pressure-shear plate impact experiments conducted in the pressure range of 9–37 GPa. Two modeling approaches are considered to account for the inelastic behavior of WC: (1) an elasto-plastic response, accounting for strain and strain-rate hardening, and (2) a brittle-like response, which incorporates pressure hardening and damage. The material models were calibrated using numerical simulations to reconstruct the measured free surface velocity components in the normal and transverse directions. Both models effectively simulate the measured velocity profiles. Above 20 GPa, the brittle model appears to better capture the experimental trends. The calibrated models for WC enable the reconstruction of the experimental data from the current work, as well as from results reported by others, for a broad range of pressures.

Additional Information

© 2021 Elsevier. Received 22 August 2021, Revised 4 December 2021, Accepted 18 December 2021, Available online 20 December 2021. The authors are grateful for support from the Office of Naval Research (Award No. N00014-16-1-2839) for the development of the PSPI capability at high pressures. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. I hear by declare that this statement has been approved by all authors.

Additional details

August 22, 2023
October 23, 2023