Improving the Precipitation Hardness of Ductile Magnesium Alloys by Twin Roll Casting

authored by: Gerrit Kurz, Eneko Eizagirre Atxega, Fahrettin Özkaya, Jan Bohlen, Sven Hübner, Bernd Arno Behrens, Sumi Jo
Abstract: The challenge implementing magnesium sheets as a lightweight material is to manufacture sheets with an acceptable formability at room temperature and sheet components with a suitable strength. The aim of this work is qualifying suitable alloys and their manufacturing process in a way that precipitation hardening is enabled after the final forming process. The precipitation morphology and the rapid solidification obtained by twin roll casting process are used to find an optimum microstructure for deep drawing and to increase the strength of the formed component by heat treatment. The results show that magnesium sheets made from Mg-Zn-Al-Ca exhibit good forming properties even after rolling from the slab, as well as an increase in hardness after a suitable heat treatment. The production route of sheets via twin roll casting process exhibits higher increases in both ductility of the sheets and hardness after heat treatment compared to the production route via ingot-rolling. This paper presents results of rolling experiments with different feedstock of Mg-Zn-Al-Ca alloys, the microstructures and textures, as well as their mechanical properties and Erichsen values. In addition, various heat treatments were carried out to increase hardness. The second part of the paper deals with the development of a suitable heated deep-drawing tool and shows the heat distribution in the tool as well as first results of the deep-drawing tests.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Helmholtz Zentrum Geesthacht Centre for Materials and Coastal Research
Kyungpook National University
Type: Conference contribution
Pages: 492-499
No. of pages: 8
Publication date: 2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Automotive Engineering, Aerospace Engineering, Mechanical Engineering, Fluid Flow and Transfer Processes
Electronic version(s): https://doi.org/10.1007/978-3-031-41341-4_51 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{578633c503664ca59eecd6e76d405aff,
title = "Improving the Precipitation Hardness of Ductile Magnesium Alloys by Twin Roll Casting",
abstract = "The challenge implementing magnesium sheets as a lightweight material is to manufacture sheets with an acceptable formability at room temperature and sheet components with a suitable strength. The aim of this work is qualifying suitable alloys and their manufacturing process in a way that precipitation hardening is enabled after the final forming process. The precipitation morphology and the rapid solidification obtained by twin roll casting process are used to find an optimum microstructure for deep drawing and to increase the strength of the formed component by heat treatment. The results show that magnesium sheets made from Mg-Zn-Al-Ca exhibit good forming properties even after rolling from the slab, as well as an increase in hardness after a suitable heat treatment. The production route of sheets via twin roll casting process exhibits higher increases in both ductility of the sheets and hardness after heat treatment compared to the production route via ingot-rolling. This paper presents results of rolling experiments with different feedstock of Mg-Zn-Al-Ca alloys, the microstructures and textures, as well as their mechanical properties and Erichsen values. In addition, various heat treatments were carried out to increase hardness. The second part of the paper deals with the development of a suitable heated deep-drawing tool and shows the heat distribution in the tool as well as first results of the deep-drawing tests.",
keywords = "age-hardenability, formability, magnesium, precipitates, sheets, texture",
author = "Gerrit Kurz and Atxega, {Eneko Eizagirre} and Fahrettin {\"O}zkaya and Jan Bohlen and Sven H{\"u}bner and Behrens, {Bernd Arno} and Sumi Jo",
note = "Funding Information: We gratefully thank the German Research Foundation (DFG) for funding the project “FESTIMAG, Strength increase in components made of wrought magnesium alloys by precipitation hardening” under the grand numbers BE 1691/252-1/KU 3843/2-1.; 14th International Conference on Technology of Plasticity, ICTP 2023 ; Conference date: 24-09-2023 Through 29-09-2023",
year = "2024",
doi = "10.1007/978-3-031-41341-4_51",
language = "English",
isbn = "9783031413407",
series = "Lecture Notes in Mechanical Engineering",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "492--499",
editor = "Katia Mocellin and Pierre-Olivier Bouchard and R{\'e}gis Bigot and Tudor Balan",
booktitle = "Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity - ICTP 2023 - Volume 3",
address = "Germany",
}