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Finite element simulation of hot isostatic pressing of metal powders
Author(s) -
Abouaf M.,
Chenot J. L.,
Raisson G.,
Bauduin P.
Publication year - 1988
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620250116
Subject(s) - hot isostatic pressing , viscoplasticity , finite element method , materials science , pressing , compressibility , constitutive equation , porosity , turbine , mechanics , metallurgy , composite material , mechanical engineering , structural engineering , engineering , physics , sintering
Rate form constitutive equations of elasto‐viscoplastic type are expressed in a manner similar to that of classical metals, but the viscoplastic part, which is no longer incompressible, is related to the rate of variation of porosity. An incremental and implicit algorithm has been implemented in a finite element program in order to simulate hot isostatic pressing of an Astroloy powder. Temperature distributions are shown to induce strong density variations in real parts during hot isostatic pressing (HIP). For one particular turbine disk, we tested the sensitivity of the final shape to different processing parameters. Computed final shapes compare well with experimental ones.