What is it about?
The final shape of PM HIP components is determined by many factors. Current HIP simulation cannot predict non-uniform shrinkage if the powder inside the capsule is assummed to be homogeneous, . Results from this study has been proved that the initial powder distribution inside HIP capsules influences on the final shape of PM HIP components and it should be included as initial condition for FEM model in order to have better prediction.
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Why is it important?
The influence of the initial relative density (RD) gradient originating from an inhomogeneous powder distribution on the final shape of HIP products is not clear and hard to predict. In this work a method is presented to determine the influence of the initial RD distribution of powder on the final shape of the HIP products. The results are of particular importance for companies producing big and complex (near) net shape components by powder-HIP.
Perspectives
The powder inside a HIP capsule is distributed inhomogeneously and the relative density gradient strongly depends on the filling and pre-consolidation process. An exact knowledge of the initial powder distribution needs to be taken into account in the FEM models to predict the final shape and dimension of a component precisely.
Master Chung Nguyen Van
IWM, RWTH Aachen University
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This page is a summary of: Inclusion of initial powder distribution in FEM modelling of near net shape PM hot isostatic pressed components, Powder Metallurgy, April 2014, Taylor & Francis,
DOI: 10.1179/1743290114y.0000000087.
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