A new mechanical model for powder metallurgy compaction is presented. In this model, variousamount of voids can be introduced into a continuous solid, therefore porosity can be conveniently controlled.The elastic-plastic finite element method was used to analyze the sintered powder material. The model was usedto simulate compressing of a sintered cylinder. MSC.Marc of MSC.Software Corporation was applied here.Experiment was carried out by a computer controlled a universal tensile testing machine. The load-displacementcurves agree with the experimental results very well. Plastic deformation of metallic material is mostly causedby the slipping of crystal lattice. Although very small, a metal powder particle is composed of metallic crystal.Mechanical properties of a powder particle should be very close to their as solid metal counterpart.
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