HOMOGENIZATION OF TWIN-ROLL CAST AL-LI-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY

1 CIESLAR Miroslav
Co-authors:
1 KŘIVSKÁ Barbora 1 KRÁLÍK Rostislav 1 BAJTOŠOVÁ Lucia 2 GRYDIN Olexandr 2 STOLBCHENKO Mykhailo 2 SCHAPER Mirko
Institutions:
1 Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic, EU, cieslar@met.mff.cuni.cz, krivska.barbora@seznam.cz, rkralik96@seznam.cz, lucibajtos@gmail.com
2 Paderborn University, Chair of Materials Science, Paderborn, Germany, EU, grydin@lwk.upb.destolbchenko@lwk.upb.de, schaper@lwk.upb.de
Conference:
31st International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 18 - 19, 2022
Proceedings:
Proceedings 31st International Conference on Metallurgy and Materials
Pages:
593-598
ISBN:
978-80-88365-06-8
ISSN:
2694-9296
Published:
30th June 2022
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
348 views / 175 downloads
Abstract

Transformation of Fe- and Cu-rich primary phase particles was studied in an Al-Li-based alloy prepared by twin-roll casting. Thin foils for combined STEM and SEM experiments were prepared by electrolytic twin-jet polishing. They were in-situ heated in a TEM heating stage and observed at 200 kV in the JEOL JEM 2200FS electron microscope equipped with STEM HAADF and BF detectors and SEM BSE and SE detectors working both in composition and topographic modes. The resulting structures were combined with EDS mapping performed directly in the heating holder. Dissolution and transformation of Cu- and Fe-rich particles occur above 500 °C. EDS maps acquired on the foil cooled down to room temperature show that Cu and Fe are both still present in newly formed particles, most likely indicating the presence of the Al7Cu2Fe phase.

Keywords: Al-Li-based alloy, in-situ TEM, homogenization, phase transformation

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Scroll to Top