Abstract
1. The densification process of tungsten, molybdenum, niobium, and chromium powders during compacting is characterized by the same regularities. 2. With increasing compacting pressure, microdistortions build up, their magnitude attaining a maximum at a pressure of 4000–6000 daN/cm2. Upon further increase of compacting pressure, the growth of microdistortions ceases. 3. The character of variation of the elastic expansion of tungsten, molybdenum, niobium, and chromium powders is similar to that of their second-type microstresses. 4. Second-type microstresses exert a substantial influence on the size of recrystallized grains. With increasing values of second-type microstresses, recrystallized grains grow intensively up to the stage corresponding to saturation with microstresses. Subsequently, grain size becomes stabilized and is practically independent of the magnitude of second-type microstresses.
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