Abstract
The densification and microhardness values of copper and bronze powders were investigated experimentally using a computer controlled uniaxial die, and numerically using a non-linear finite element program. They, also, were analyzed statistically by establishing a hyperbolic relationship, using best fit, between density and pressure applied.The ratios of experimentally obtained maximum density to theoretical density for copper and bronze were 91 % and 81 %, respectively, at 800 MPa pressure as used in practical applications.Microhardness values were 116 and 192 kg/mm² for copper and bronze powders, respectively. The results obtained from experimental, statistical (best fit) and numerical studies were found to be in good agreement, and showed that a hyperbolic relationship existed between the density and pressure.

Key words
copper and bronze powders, uniaxial pressing, densification, microhardness, plaxis, hardening soil model.

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