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

 
L.Ochkas
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #05/06
http://www.materials.kiev.ua/article/726

Abstract

The results of computer simulation and analysis of experimental data for densificationof copper as well as iron powder performs during impulse hot pressing are presented. It isestablished firstly that the shear viscosity of porous material matrix shows more stronger adependence upon initial impact velocity in comparison with the dependence one upon per-form heating temperature. An estimated activation energy for viscous flow of matrix is equalto 0.35 eVfor copper, 0.3 eV for α-Fe, and 0.5 eV for γ-Fe.


ANALYSIS, COPPER, DENSIFICATION DYNAMICS, IMPULSE HOT PRESSING, IRON, MODELING, POROUS BODY