Investigation of green strength of powder compacts by axial and radial loading

摘要

Cohesion and angle of the internal friction, characterizing the fracture region of the Drucker--Prager's threshold states contour were experimentally determined for copper and iron green powder compacts. Iron compacts demonstrated more intensive growth of cohesion by density increase. The angle of internal friction increase in the area from 67° to 70,5° for copper compacts and decrease in the area from 70,5° to 69,9° for iron compacts by the density growth.