Identification of Porous Materials Rheological Coefficient Using Experimental Determination of the Radial and Longitudinal Strain Rate Ratio

Identification of Porous Materials Rheological Coefficient Using Experimental Determination of the Radial and Longitudinal Strain Rate Ratio

Gerard Raisson, Vassily Goloveshkin, Victor Samarov

Abstract. Traditional approach of identification of the f1 and f2 function of the Green plasticity criterion [1] for porous materials is based on the two experiments: isostatic pressing of samples in the interrupted cycles (determining density as a function of pressure providing the f2 values) and upsetting providing an equation for determining the f1 values responsible for the shear deformations. Treatment of HIP dilatometer data allows to get an independent f1 evaluation which shows that upsetting is not representative of stress state met during powder HIP densification. In the second part, a new approach is suggested allowing to determine these two functions using only the deviations from the isotropic shrinkage obtained in the interrupted cycles. This anisotropy is characterized by the ψ coefficient ratio between the radial and the axial strain rate.

Keywords
HIP Modeling, Powder Rheology

Published online 12/8/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Gerard Raisson, Vassily Goloveshkin, Victor Samarov, Identification of Porous Materials Rheological Coefficient Using Experimental Determination of the Radial and Longitudinal Strain Rate Ratio, Materials Research Proceedings, Vol. 38, pp 150-159, 2023

DOI: https://doi.org/10.21741/9781644902837-21

The article was published as article 21 of the book Hot Isostatic Pressing

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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