Efficient oscillating micro-grid mixing of CFA-aluminium composite melts

Georgios Kaisarlis, Efstratios Tsolakis, Georgios Vasileiou, Vasileios Spitas, Zhandos Tauanov, Vassilis Inglezakis, Grigorios Itskos, Christos Spitas

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An analytical, numerical and experimental study is presented on the deagglomeration and dispersion of fine coal fly ash (CFA) reinforcing particles in an A380 aluminium matrix using a piston-actuated oscillating micro-grid mixing method with a specially designed grid geometry. Based on real-time measurement of the piston force, the apparent viscosity of the melt and the effectiveness of the deagglomeration are measured indirectly. The oscillating micro-grid mixing process is shown to be considerably more time-efficient that comparative stir-casting processes currently employed, leading to a two-fold or three-fold reduction in processing time for the same or better mixing quality, or alternatively a nearly two-fold reduction in the standard deviation of the micro-hardness throughout the material.

Original languageEnglish
Pages (from-to)60-71
Number of pages12
JournalJournal of Materials Processing Technology
Volume254
DOIs
Publication statusPublished - 1 Apr 2018

Keywords

  • A380 aluminium alloy
  • coal fly ash
  • deagglomeration
  • dispersion
  • metal matrix composites
  • oscillating micro-grid mixing

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