Abstract
The hot isostatic pressing (HIPing) of metal powder is increasingly becoming a popular route for manufacturing engineering products. Based on the thermally coupled viscoplastic analysis of the HIPed part, the predicting capability of densification characteristics is displayed during the consolidation of Astroloy powder compacts. The calculations and conclusions drawn were based on the important parameters of pressure, temperature and relative density. The results obtained are then compared, for with- and without-container cylindrical HIP preforms. Both isothermal and non-isothermal temperature cycles were used for the simulation study. The numerical predictions show that the powder is not in the hydrostatic pressure state during the normal HIP temperature and pressure cycle, whereas during isothermal and isotropic heating the isostatic pressure distribution was achieved. Also, the present study demonstrates clearly the influence of the container on the densification of powder under thermomechanical loading.
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