Study of rheological behaviour of stainless steel feedstock taking into account the thermal effects

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Powder injection moulding (PIM) process is well established for production of small precision components with both metal and ceramic powders. In comparison to unfilled polymers, the PIMfeedstocks are highly filled multiphase systems, whose flow behaviour is very sensitive to composition of binder and powder loading. Furthermore, the rheology of highly filled multiphase systems is characterized by strain and temperature dependence and influenced by flow instabilities and yield stress. In this study, the rheological behaviour of 316L feedstocks with a polypropylene/wax binder system and different powder loadings was investigated. The experimental work was performed with a rotational and a high pressure capillary rheometer. The aim of this work was to evaluate mixing rules predicting the viscosity of the feedstock out of its composition taking into account the melt temperature rise due to dissipative heating. Hence, measured data were corrected with respect to temperature. Thus the influence of the temperature onto the viscosity and the related model was evaluated.
Original languageEnglish
Title of host publicationIBEREO’15 IBERIAN RHEOLOGY CONFERENCE
EditorsMaria Graca Rasteiro
Place of PublicationCoimbra, Portugal
PublisherUniversidad Nacional de Colombia
Pages50-53
Number of pages4
Publication statusPublished - 30 Nov 2015
EventIBEREO15 - Challenges in rheology and product development - FCT/UC, Coimbra, Portugal
Duration: 7 Sept 20159 Sept 2015

Conference

ConferenceIBEREO15 - Challenges in rheology and product development
Country/TerritoryPortugal
CityCoimbra
Period7/09/159/09/15

Keywords

  • Rheology
  • powder injection moulding
  • highly filled polymer
  • heat dissipation
  • modelling

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