Thermomechanical Properties of Polycrystalline Vanadium in Compression

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Abstract
The mechanical behavior of commercially pure polycrystalline vanadium (99.8%) has been characterized in compression over a strain rate range of 104 to 6x103 s-1. In addition, the temperature dependence of the flow stress of vanadium has been examined over a range of temperatures from 25 to 700 °C for a strain rate of 103 s-1. Optical metallography of the deformed specimens revealed no twins, deformation bands or microcracks, suggesting that the deformation proceeded largely by crystallographic slip. The strain rate and temperature dependence of the strain hardening rate and flow stress is indicative of a BCC material, although a pronounced local peak in the flow stress was observed at about 400 °C

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