Impurities segregation in twin-roll cast Al-Mg-Sc-Zr material

Lucia Bajtošová, Michaela Šlapáková, Jan Bajer, Barbora Křivská, Olexandr Grydin, Mykhailo Stolbchenko, Stefan Zaunschirm, Johann Kastner, Miroslav Cieslar

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review

Abstract

Twin-roll casting (TRC) is a modern method of preparation of aluminum alloys. The distinctive feature of TRC is the combination of rapid metal solidification and subsequent plastic reduction in a single combined processing step. As a result of intensive heat extraction to the coolant via caster rolls, the melt solidifies and undergoes plastic reduction similar to the rolling process. However, some specific microstructural features of twin-roll cast strips, which restrict applications of this technology, are known. These are localized centre line segregation, surface and near-surface microsegregation and microstructural inhomogeneity. These features lead to the deterioration of mechanical properties of the strips, in particular strength, formability and corrosion resistance and can only be eliminated during a complex thermomechanical treatment. In the present contribution segregations in TRC Al-Mg-Sc-Zr alloy were studied by means of light optical microscopy, electron microscopy and 3D X-ray computer tomography. The spatial distribution was succesfully detected and morphology was described.

Original languageEnglish
Title of host publicationMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
PublisherTANGER Ltd.
Pages1455-1459
Number of pages5
ISBN (Electronic)9788087294840
Publication statusPublished - 2018
Event27th International Conference on Metallurgy and Materials, METAL 2018 - Brno, Czech Republic
Duration: 23 May 201825 May 2018

Publication series

NameMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings

Conference

Conference27th International Conference on Metallurgy and Materials, METAL 2018
CountryCzech Republic
CityBrno
Period23.05.201825.05.2018

Keywords

  • Aluminum alloy
  • Computer tomography
  • Segregation
  • Twin-roll casting

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