Formability of 7000 aluminum alloys in warm and hot forming condition

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Behrens, B.-A.; Hübner, S.; Vogt, H.: Formability of 7000 aluminum alloys in warm and hot forming condition. In: IOP Conference Series: Materials Science and Engineering 418 (2018), Nr. 1, 12027. DOI:

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Sum total of downloads: 116

In recent years, the automobile industry has been calling for new lightweight solutions to fulfill increasing ecologically requirements. A weight reduction of automobile body constructions is necessary to reduce fuel consumption and CO2 emissions. In order to reach this aim, new materials and novel forming processes are required. Also, the importance of aluminum alloys in the automobile industry is constantly increasing. Nowadays, mainly alloys of the 5000 and 6000 aluminum series are used for structure parts or shell parts, respectively. Another alloy series are the 7000 aluminum materials. These alloys offer a great lightweight potential due to their high specific strength combined with a moderate ultimate elongation. Nevertheless, these alloys are not yet widely used in the automobile industry. The reason is the limited formability of 7000 aluminum at room temperature in high-strength heat treatment condition. There are two approaches to increase the formability based on elevated temperatures, specifically the two processes of warm and hot forming at temperatures lower than the recrystallization temperature or above it, respectively. This paper deals with the investigation of the influence of forming conditions, especially the forming temperature. Trapezoidal parts were deep-drawn at different forming temperatures and subsequently investigated by determining the deformation with an optical measurement system as well as the springback of the material. In addition, the influence of the forming temperature on the flange feed was investigated as well as the influence of the paint bake process on the artificial aging step. Results show, that the formability increases with increasing forming temperature in the warm forming process route. Also, the artificial aging time can be decreased by a combined aging with paint bake heat treatment.
License of this version: CC BY 3.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2018
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 73 62.93%
2 image of flag of United States United States 15 12.93%
3 image of flag of China China 8 6.90%
4 image of flag of United Kingdom United Kingdom 4 3.45%
5 image of flag of Singapore Singapore 2 1.72%
6 image of flag of Sweden Sweden 2 1.72%
7 image of flag of Russian Federation Russian Federation 2 1.72%
8 image of flag of Netherlands Netherlands 2 1.72%
9 image of flag of Italy Italy 2 1.72%
10 image of flag of Czech Republic Czech Republic 2 1.72%
    other countries 4 3.45%

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