Influence of the Quenching Rate and Natural Ageing Duration on the Formability and Mechanical Properties of EN AW-7075

authored by: B. A. Behrens, S. Hübner, H. Vogt, O. Golovko, S. Behrens, F. Nürnberger
Abstract: Due to the low density and high tensile strength, the aluminium alloy EN AW-7075 offers a high lightweight potential for structural components. In recent years, 7xxx-aluminium alloys have been the subject of numerous investigations in the field of warm and hot forming and suitable heat treatments to fully use their potential for applications in automotive bodies. Alternatively, forming blanks of these alloys at room temperature in the W-temper state is favourable since conventional tools can be used. However, this condition is unstable. As the ageing duration after quenching increases, the formability decreases due to natural ageing. Hence, the objective of this investigation was to determine the formability of EN AW-7075 as a function of the ageing time. Furthermore, since the quenching rate after solution heat treatment influences the resulting mechanical properties, an adapted process route to manufacture components with tailored properties was explored. For this purpose, samples were partially quenched after solution heat treatment and then artificially aged. To determine the influence of the quenching rate, hardness tests were carried out.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Institute of Materials Science
Type: Conference contribution
Pages: 959-971
No. of pages: 13
Publication date: 2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Energy Engineering and Power Technology, Mechanics of Materials, Metals and Alloys, Materials Chemistry
Electronic version(s): https://doi.org/10.1007/978-3-030-75381-8_80 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{e8a0de4c22de44ab8d387d0883a8ecb0,
title = "Influence of the Quenching Rate and Natural Ageing Duration on the Formability and Mechanical Properties of EN AW-7075",
abstract = "Due to the low density and high tensile strength, the aluminium alloy EN AW-7075 offers a high lightweight potential for structural components. In recent years, 7xxx-aluminium alloys have been the subject of numerous investigations in the field of warm and hot forming and suitable heat treatments to fully use their potential for applications in automotive bodies. Alternatively, forming blanks of these alloys at room temperature in the W-temper state is favourable since conventional tools can be used. However, this condition is unstable. As the ageing duration after quenching increases, the formability decreases due to natural ageing. Hence, the objective of this investigation was to determine the formability of EN AW-7075 as a function of the ageing time. Furthermore, since the quenching rate after solution heat treatment influences the resulting mechanical properties, an adapted process route to manufacture components with tailored properties was explored. For this purpose, samples were partially quenched after solution heat treatment and then artificially aged. To determine the influence of the quenching rate, hardness tests were carried out.",
keywords = "7xxx-aluminium alloys, Cold forming, Formability, Tailored tempering",
author = "Behrens, {B. A.} and S. H{\"u}bner and H. Vogt and O. Golovko and S. Behrens and F. N{\"u}rnberger",
note = "Funding Information: Acknowledgments The project “Tailored Tempering of 7xxx-Aluminum Alloys” Ref.-No. AiF 20190N was financed and supervised by the European Research Association for Sheet Metal Working (EFB). In the scope of the program to promote Industrial Collective Research, it was funded by the German Federation of Industrial Research Associations (AiF) by means of the Federal Ministry of Economic Affairs and Energy (BMWi) on the basis of a decision by the German Bundestag. Furthermore, the authors would like to thank the industrial partners in this research project.; 13th International Conference on the Technology of Plasticity, ICTP 2021 ; Conference date: 25-07-2021 Through 30-07-2021",
year = "2021",
doi = "10.1007/978-3-030-75381-8_80",
language = "English",
isbn = "9783030753801",
series = "Minerals, Metals and Materials Series",
publisher = "Springer, Cham",
pages = "959--971",
editor = "Glenn Daehn and Jian Cao and Brad Kinsey and Erman Tekkaya and Anupam Vivek and Yoshinori Yoshida",
booktitle = "Forming the Future",
}