Abstract
In this work two models for predicting the densification behavior of sintered refractory metals during hot working operations are presented. It is known from experiments and cell model calculations that the pore shape change has a significant influence on the densification behavior. Therefore this effect should be included in a continuum constitutive description. The first model presented is a phenomenological extension of the Gurson model, the second one is the model of Gologanu, Leblond & Devaux, which was implemented as a user material model into the finite element code ABAQUS. The numerical results are compared with the density distribution of a tapered disk made of pure molybdenum after the hot forming operation.
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