Study of the fragile-to-ductile transition of tungsten

The aim of this study consists in analyzing the ductile-brittle transition temperature of a sintered tungsten. We lay emphasis on the appraisal of the influence of the triaxial stress state, of the strain rate and of the applied loading direction on the transition temperature. A simple modeling based on local competition between cleavage stress and theorical elastic yield stress is presented. It allows to appraise the transition temperature of a material under any loading condition.