Continual model variant of viscous materials Report 2. Experimental proof

Abstract

Considering the non-uniform character of viscous flow of hard phase, the continual model of hot deformation of porous powder materials has been checked. The procedure of the phenomenological creep parameter identification for the hard phase of powder materials is described. A particular mechanism of viscous flow of hard phase particles is shown to be realized depending on temperature-force strain conditions. Unlike the cast materi- als the powder material creep process, alongside with volume and boundary diffusion, can be controlled by superficial diffusion as well. In case of the same creep mechanism, the offered continual model allows us to use for powder materials directly the phenomenological constants of cast materials.