Simulation of hot isostatic pressing of metal powder components to near net shape

Presents a finite element formulation of hot isostatic pressing (HIP) based on a continuum approach using thermal-elastoviscoplastic constitutive equations with compressibility. The formulation takes into consideration dependence of the viscoplastic part on the porosity. Also takes into account the...

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Bibliographic Details
Published in:Engineering computations 1996-01, Vol.13 (5), p.13-37
Main Authors: Svoboda, Ales, Häggblad, Hans-Åke, Näsström, Mats
Format: Article
Language:English
Subjects:
Applied sciences
CAE
Computer Aided Design
Computer aided engineering
Concurrent engineering
Datorstödd maskinkonstruktion
Deformation
Density
Exact sciences and technology
Finite element analysis
Geometry
Heat treating
Hållfasthetslära
Material Mechanics
Materialmekanik
Metal powders
Metals
Metals. Metallurgy
Metalworking industry
Numerical analysis
Powder metallurgy
Powder metallurgy. Composite materials
Production techniques
Simulation
Soil mechanics
Solid Mechanics
Studies
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Summary:Presents a finite element formulation of hot isostatic pressing (HIP) based on a continuum approach using thermal-elastoviscoplastic constitutive equations with compressibility. The formulation takes into consideration dependence of the viscoplastic part on the porosity. Also takes into account the thermomechanical response, including nonlinear effects in both the thermal and mechanical analyses. Implements the material model in an implicit finite element code. Presents experimental procedures for evaluating the inelastic behaviour of metal powders during densification and experimental data. Chooses the simulation of the dilatometer measurement of a cylindrical component during HIP and manufacturing simulation of a turbine component to near net shape (NNS) as a demonstrator example. Both components are made of a hot isostatically pressed hot-working martensitic steel. Compares the result of the simulation in the form of the final geometry of the container with the geometry of a real component produced by HIP. Makes a comparison between the calculated and measured deformations during the HIP process for the cylindrical component. Measures the final geometry of the turbine component by means of a computer controlled measuring machine (CMM). Performs the complete process from design and simulation to geometry verification within a computer-aided concurrent engineering (CACE) system.
ISSN:0264-4401
1758-7077
1758-7077
DOI:10.1108/02644409610120713