Massive vanadium was prepared by the hot‐wire reduction of vanadium iodide vapor by both the Van Arkel‐de Boer method and a straight‐flow process. The iodide decomposition provides an excellent method of obtaining small quantities of vanadium exceptionally low in nonmetallic impurities. Metal prepared by the straight‐flow process could be worked directly, but specimens prepared by the Van Arkel‐de Boer process were not satisfactory for direct fabrications and were arc melted prior to a determination of their mechanical properties. Iodide vanadium has excellent ductility, moderate strength, and a high modulus of elasticity. The cold workability of iodide vanadium was evaluated by the use of cold rolling and flow‐curve data. The metal was found to have a high capacity for cold work and could be cold rolled to give a ninety per cent reduction without intermediate annealing.
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Nash et al. (1953) studied this question.