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Technical Briefs

Density Measurement of Powder Metallurgy Compacts by Means of Small Indentation

[+] Author and Article Information
Fabrizio Quadrini

Department of Mechanical Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italyquadrini@ing.uniroma2.it

Erica Anna Squeo

Department of Mechanical Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italysqueo@ing.uniroma2.it

J. Manuf. Sci. Eng 130(3), 034503 (May 16, 2008) (4 pages) doi:10.1115/1.2927441 History: Received December 07, 2006; Revised January 25, 2008; Published May 16, 2008

In this study, the density of powder metallurgy compacts was measured by means of small indentation. Zinc (Zn) and aluminum (Al) tablets were fabricated by cold compaction of powders: different tablet densities were obtained by changing the packing pressure. Instrumented indentation tests were carried out by means of flat cylindrical indenters having diameters of 1mm and 2mm. After a calibration procedure, the slope of the indentation curve or the indentation load can be used for the density evaluation.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 4

Indentation curve slope versus tablet relative density for both materials and indenters

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Figure 5

Indentation load versus tablet relative density for both materials and indenters

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Figure 6

Ratio between the indentation data related to different indenters

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Figure 3

Relative density of Zn and Al tablets versus maximum packing pressure

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Figure 2

Indentation curves for both materials and indenters: (a) Zn, 1mm; (b) Al, 1mm; (c) Zn, 2mm; (d) Al, 2mm

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Figure 1

Forces acting on the tablet under compaction and typical compression curves for Zn and Al

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