In this work the behaviour of ferrous powder during uniaxial compaction was investigated; experiments were carried out in a hydraulic press, producing green parts with different H/D ratio and different density. The data continuously recorded by the press in terms of force and displacement of the axes were analysed, allowing to distinguish the contribution of the reversible phenomena (elastic deformation of powders and tools) and of the irreversible phenomena (rearrangement and plastic deformation of the powders). A preliminary analytical model describing the trend of reversible and permanent deformations of the column of powder versus the applied pressure was proposed. From the analysi s of the data recorded in different compaction cycles, densification curves have also been derived.

From Experimental Data an Analytical Model of Powder Behavior During Uniaxial Cold Compaction / Cristofolini, Ilaria; Molinari, Alberto; Pederzini, Gianluca; Piva, Massimiliano; Grandi, Andrea. - CD-ROM. - 01:(2015), pp. 19-30. ((Intervento presentato al convegno PowderMet2015 tenutosi a San Diego - CA nel 17-20 May 2015.

From Experimental Data an Analytical Model of Powder Behavior During Uniaxial Cold Compaction

Cristofolini, Ilaria;Molinari, Alberto;
2015

Abstract

In this work the behaviour of ferrous powder during uniaxial compaction was investigated; experiments were carried out in a hydraulic press, producing green parts with different H/D ratio and different density. The data continuously recorded by the press in terms of force and displacement of the axes were analysed, allowing to distinguish the contribution of the reversible phenomena (elastic deformation of powders and tools) and of the irreversible phenomena (rearrangement and plastic deformation of the powders). A preliminary analytical model describing the trend of reversible and permanent deformations of the column of powder versus the applied pressure was proposed. From the analysi s of the data recorded in different compaction cycles, densification curves have also been derived.
Advances in Powder Metallurgy and Particulate Materials - 2015
Princeton, New Jersey
Metal Powder Industries Federation
9781943694020
Cristofolini, Ilaria; Molinari, Alberto; Pederzini, Gianluca; Piva, Massimiliano; Grandi, Andrea
From Experimental Data an Analytical Model of Powder Behavior During Uniaxial Cold Compaction / Cristofolini, Ilaria; Molinari, Alberto; Pederzini, Gianluca; Piva, Massimiliano; Grandi, Andrea. - CD-ROM. - 01:(2015), pp. 19-30. ((Intervento presentato al convegno PowderMet2015 tenutosi a San Diego - CA nel 17-20 May 2015.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/112913
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