Stereological analysis of the microstructural inhomogeneities in direct-chill cast and continuous-cast Aluminium-Magnesium alloy (AA5754)

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Abstract

In this study, quantitative microstructural investigations were performed to understand the influence of the processing route on the grain and particle structures in an Al-Mg alloy (AA5754) The microstructures of two different batches of 5754-O sheets of the same composition (one produced by direct-chill casting (DC) and the other by continuous casting (CC)) were investigated using optical, scanning and transmission electron microscopy. Several characteristic microstructural features were linked to the processing route, especially the banding of the Fe-rich constituent particles along the rolling direction (RD) combined with a through-thickness variation in grain size alloys produced by CC, compared to a random particle distribution of relatively coarser sizes and a roughly uniform through-thickness grain size distribution in the alloys produced by DC The study also assessed the significanoe of the characteristic microstructural features associated with DC and CC (e.g. particle size banding and grain size variation) on the identification the processing route, highlighting the features that represent inconclusive evidence for a certain route.

Translated title of the contributionStereological analysis of the microstructural inhomogeneities in direct-chill cast and continuous-cast Aluminium-Magnesium alloy (AA5754)
Original languageGerman
Pages (from-to)77-94
Number of pages18
JournalPraktische Metallographie
Volume51
Issue number2
DOIs
Publication statusPublished - 13 Mar 2014

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Mechanics of Materials

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