Influence of the packing and compaction parameters of spherical waxy elements on the stress-strain state of the compact

Obtaining predictable characteristics for complex-geometry products made from dissimilar-material powder compositions used for lost-wax molding allows substantially expanding the applicability of special investment-casting methods. It has been established that no distribution of properties over the finished product is achieved when molding complex-shape compacts from a mixture of waxy and water-soluble components. The problem of elastic response of the compacted material of such nature is solved by means of a material experiment which allows for determining the influence of the initial packing and compaction parameters of spherical waxy elements on the stress-strain state of the compact. The paper presents the research findings in the form of empirical third order polynomial of stress-strain relations in powder bodies, considering various cases of positioning of deformable plastic and elastic elements.