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Densification dynamics of copper and iron powder billets in hot shock compaction: Simulation and analysis

  • Theory and Technology of Forming Process
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Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

The paper presents the results from computer simulation and analysis of experimental data on the densification of copper and iron powder billets during hot shock compaction. It is established for the first time that the shear viscosity of the porous material matrix shows a stronger dependence on the initial impact velocity than the billet temperature does. The estimated activation energy of the viscous flow in the matrix is equal to 0.35 eV for copper, 0.3 eV for α-Fe, and 0.5 eV for γ-Fe.

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Authors and Affiliations

  1. Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine

    M. S. Koval’chenko & L. F. Ochkas

Authors
  1. M. S. Koval’chenko
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  2. L. F. Ochkas
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Correspondence to M. S. Koval’chenko.

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__________

Translated from Poroshkovaya Metallurgiya, Vol. 47, No. 5–6 (461), pp. 13–25, 2008.

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Koval’chenko, M.S., Ochkas, L.F. Densification dynamics of copper and iron powder billets in hot shock compaction: Simulation and analysis. Powder Metall Met Ceram 47, 273–283 (2008). https://doi.org/10.1007/s11106-008-9016-4

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  • DOI: https://doi.org/10.1007/s11106-008-9016-4

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