Abstract
We have processed fully dense, nano-structured vanadium (V), a bcc metal with a moderately high melting temperature (1910 °C) by high-energy ball milling followed by two-step consolidation. We have characterized the as-milled powder and the microstructure of the consolidated, fully dense material using X-ray diffraction and transmission electron microscopy. It was found that the grain size of the consolidated V is around 100 nm. Mechanical properties of the nano-structured V were studied under both quasi-static (strain rates in the range of 10 −3–10 0 s −1) and dynamic compression (Kolsky bar, strain rates in the range of ∼10 3 s −1). A high-speed camera was used to observe the deformation and failure process of the specimen under dynamic loading. Cracking was observed along the loading axis under quasi-static compression. Under dynamic loading, nano-structured V fails in a very similar manner to nano-structured Fe and metallic glasses, i.e., via shear banding.
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