Calculation of the plastic flow of P/M material during the forging of axisymmetric disks

Conclusions As a result of an investigation into the process of compression of a porous annular blank, curves have been constructed of the distribution of density and of the parameter of strengthening of the material of the basis. Radial flow leads to the formation, at the inner surface of the blank, of a zone of maximum intensity of bulk and shear strains. This brings the appearance of a region of solid material (=1), whose boundary shifts during compression toward the side wall of the container. The velocities and stresses at the interface between the solid and porous materials are continuous owing to the dependence of the permissible field of velocities on density. With the results obtained it is possible to determine an optimum starting blank shape, ensuring, at a given degree of deformation, the required final dimensions and density of the part.Translated from Poroshkovaya Metallurgiya, No. 7(271), pp. 16–20, July, 1985.