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#17885, Dynamic Strength of Cemented Tungsten Carbides Under Shock Loading

In order gain further insights into thermodynamic states of shock-compressed cemented tungsten carbides with 3.7 wt.% cobalt binder, we present results of longitudinal sound (release wave) speed measurement and their analysis as a function of peak stress up to 100 GPa. The sound speeds were determined using plate impact experiments using front surface impact and release wave overtake experiments using laser interferometry. The elastic longitudinal and shear moduli of the tungsten carbide at each shock compression states in the experiments are determined using the measured longitudinal sound speed data along with bulk sound speed estimated via the fourth-order Birch-Murnaghan EoS and thermodynamics. Moreover, the dynamic strength of the cemented shocked tungsten carbide samples is determined using plate impact shock re-shock and shock release experiments using the self consistent technique developed by Asay and Lipkin for determining the dynamic yield strength of shock loaded metals.

Bingsen Wang   Washington State University
Vikas Prakash   Washington State University