In previous works the deformation of the powder column during uniaxial cold compaction was studied by means of experimental data, also deriving relationships with densification and the axial and radial stresses distribution. Cylindrical specimens were considered in all the previous works. Aiming at enlarging the field of application of the results, obtained by the data continuously recorded by an industrial press without any additional device, the influence of geometry is investigated in this work. Rings characterised by different H/T ratios (Height on Thickness equal to 1, 2, 3, 4), considerably higher than in the previous works, were produced using different compaction strategies. Densification curves are derived, where density is reported as a function of the pressure applied by the upper punch, also highlighting density gradients. The deformation of the powder column is derived from experimental data and related to the densification. The results are compared with those obtained investigating cylindrical specimens.

THE INFLUENCE OF H/T RATIO ON THE DENSIFICATION MODEL OF AISI 316L POWDER DURING UNIAXIAL COLD COMPACTION / Cristofolini, Ilaria; Molinari, Alberto; Zago, Marco; Pederzini, Gianluca; Rambelli, Alex. - Part 1 - Design & Modeling of PM Materials, Components & Processes(2017), pp. 30-40. ((Intervento presentato al convegno PowderMet 2017 tenutosi a Las Vegas, Nevada nel 13-16 June 2017.

THE INFLUENCE OF H/T RATIO ON THE DENSIFICATION MODEL OF AISI 316L POWDER DURING UNIAXIAL COLD COMPACTION

Ilaria Cristofolini;Alberto Molinari;Marco Zago;
2017

Abstract

In previous works the deformation of the powder column during uniaxial cold compaction was studied by means of experimental data, also deriving relationships with densification and the axial and radial stresses distribution. Cylindrical specimens were considered in all the previous works. Aiming at enlarging the field of application of the results, obtained by the data continuously recorded by an industrial press without any additional device, the influence of geometry is investigated in this work. Rings characterised by different H/T ratios (Height on Thickness equal to 1, 2, 3, 4), considerably higher than in the previous works, were produced using different compaction strategies. Densification curves are derived, where density is reported as a function of the pressure applied by the upper punch, also highlighting density gradients. The deformation of the powder column is derived from experimental data and related to the densification. The results are compared with those obtained investigating cylindrical specimens.
Advances in Powder Metallurgy & Particulate Materials - 2017
Princeton, New Jersey
MPIF
978-1-943694-15-0
Cristofolini, Ilaria; Molinari, Alberto; Zago, Marco; Pederzini, Gianluca; Rambelli, Alex
THE INFLUENCE OF H/T RATIO ON THE DENSIFICATION MODEL OF AISI 316L POWDER DURING UNIAXIAL COLD COMPACTION / Cristofolini, Ilaria; Molinari, Alberto; Zago, Marco; Pederzini, Gianluca; Rambelli, Alex. - Part 1 - Design & Modeling of PM Materials, Components & Processes(2017), pp. 30-40. ((Intervento presentato al convegno PowderMet 2017 tenutosi a Las Vegas, Nevada nel 13-16 June 2017.
File in questo prodotto:
File Dimensione Formato  
POWDERMET2017_Sacmi.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 564.24 kB
Formato Adobe PDF
564.24 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/198531
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? ND
social impact