IMPURITIES SEGREGATION IN TWIN-ROLL CAST AL-MG-SC-ZR MATERIAL

1 BAJTOŠOVÁ Lucia
Co-authors:
1 ŠLAPÁKOVÁ Michaela 1 BAJER Jan 1 KŘIVSKÁ Barbora 2 GRYDIN Olexandr 2 STOLBCHENKO Mykhailo 3 ZAUNSCHIRM Stefan 3 KASTNER Johann 1 CIESLAR Miroslav
Institutions:
1 Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic, EU, lucibajtos@gmail.com, slapakova@karlov.mff.cuni.cz, JanBajer69@seznam.cz, krivska.barbora@seznam.cz, cieslar@met.mff.cuni.cz
2 University Paderborn, Faculty of Mechanical Engineering, Paderborn, Germany, EU, olexandr.grydin@uni-paderborn.de, stolbchenko@lwk.uni-paderborn.de
3 University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, 4600 Wels, Austria, EU, Stefan.Zaunschirm@fh-wels.at, johann.kastner@fh-ooe.at
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1455-1459
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
35 views / 16 downloads
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.

Keywords: Twin-roll casting, aluminum alloy, segregation, computer tomography
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