Modeling of the Hot Isostatic Pressing Process.
Abstract
This report describes the first year of progress of a two year investigation to develop a modeling strategy to predict the final shape of components manufactured by the Hot Isostatic Pressing (HIP) process. When a powder metal is subjected to the high pressures at high temperatures there is a permanent reduction in the macroscopic volume by approximately 30 percent. The volume reduction, which is not included in classical creep and plasticity theories, necessitates the modification of the classical theories. The major part of this report concerns the development of a constitutive model for powder metals. A model for powder Metals subjected to an external hydrostatic pressure has been developed and compares well with experimental results. The exact form of the theory depends on the results of mechanical tests presently being performed. The constitutive model is being incorporated into the MARC Analysis Research Corporation (MARC) nonlinear finite element computer program and experiments analyzes using the modified code will be performed to verify the accuracy of the theory. Once the theory has been verified it will be applied to the HIP of a disk where a sensitivity study will determine an efficient modeling strategy. The results and future plans of the program are discussed in detail. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA078162
Entities
People
- Brice N. Cassenti
- K. J. Cheverton
Organizations
- United Technologies Corporation