Effective area in powder compacts under uniaxial compression

A simple equation is proposed for calculating the effective area in a powder compact at any stage of a uniaxial compression process. In this equation, the effective area is a function of both the sample porosity and the tap porosity of the starting powder. The tap porosity determines to a great exte...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-03, Vol.395 (1), p.208-213
Hauptverfasser: Montes, J.M., Cuevas, F.G., Cintas, J.
Format: Artikel
Sprache:eng
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Zusammenfassung:A simple equation is proposed for calculating the effective area in a powder compact at any stage of a uniaxial compression process. In this equation, the effective area is a function of both the sample porosity and the tap porosity of the starting powder. The tap porosity determines to a great extent the pore structure of the compact, since this depends on the size, shape and distribution of powder particles. The proposed equation was evaluated by using a computer simulation of the deformation process for a simple cubic packing, and direct measurements on SEM images of powder compacts prepared at different pressures. Results are in very good agreement with theoretical predictions.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2004.12.023