Abstract
The purpose of this paper is to present a remarkable effect of the deformation procedure on the ductility of chromium in air at the temperature just below the ductile-brittle transition temperature (DBTT). The experiments were carried out with not only chromium, but also molybdenum and tungsten, all of which are bcc metals of the 6A group in the periodic table. Furthermore, the relationship between the deformation procedure and test environments was investigated experimentally for chromium. All these experiments were performed using a small punch (SP) test.
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