V. Samarov, V. Goloveshkin, D. Seliverstov, LNT PM Inc., Garden Grove, CA
The general task of HIP modeling is in designing the initial shape of the HIP tooling providing the final “net” or “near net shape” part after HIP consolidation of powder. It is well known that there are no precise mechanical models of material behavior for stress and temperature conditions far beyond the yield level typical for HIP. Therefore in most of the cases the initial adequacy of the constitutive equations does not enable to provide the necessary precision of modeling. The real process of adequate mathematical modeling for this complex technological process comprises one or two iterations when after the first modeling and its experimental verification , the necessary corrections are installed into the model. The core of modeling is the description of the mutual deformation of the compressible (powder) and non-compressible (HIP tooling) materials. The paper presents the evolution of the models providing adequate description of the HIP deformation for parts of different geometrical complexity and physical non-uniformity mainly used for the aerospace applications.
Summary: The general task of HIP modeling is in designing the initial shape of the HIP tooling providing the final “net” or “near net shape” part after HIP consolidation of powder. It is well known that there are no precise mechanical models of material behavior for stress and temperature conditions far beyond the yield level typical for HIP. Therefore in most of the cases the initial adequacy of the constitutive equations does not enable to provide the necessary precision of modeling.
The real process of adequate mathematical modeling for this complex technological process comprises one or two iterations when after the first modeling and its experimental verification , the necessary corrections are installed into the model.
The core of modeling is the description of the mutual deformation of the compressible (powder) and non-compressible (HIP tooling) materials.
The paper presents the evolution of the models providing adequate description of the HIP deformation for parts of different geometrical complexity and physical non-uniformity mainly used for the aerospace applications.
