The Effect of Tungsten Additions on the Shock Response of Tantalum
The behaviour of tantalum under shock loading conditions has received significant attention due to its use as a penetrator material by the military. In common with other body centred cubic materials such a tungsten and tungsten heavy alloy (WHA), it has been shown to display a significant drop in shear strength behind the shock front before release waves bring the material back to ambient conditions. Microstructural examination of recovered samples has shown that deformation is achieved largely by the motion of existing dislocations rather than dislocation generation. As dislocation motion can be considered to be a stress relief mechanism, the observed decrease in shear strength is in agreement with microstructural results. We now extend these shear strength measurements to Ta-2.5wt% W to examine the effects of simple alloying on tantalum.
KeywordsShear Strength Shock Front Shock Loading Lateral Stress Dislocation Generation
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