Investigation of Geometrical and Microstructural Influences on the Mechanical Properties of an Extruded AA7020 Tube

Reblitz J, Wiesenmayer S, Trân R, Merklein M (2023)

Publication Language: English

Publication Type: Book chapter / Article in edited volumes

Publication year: 2023

Edited Volumes: Lecture Notes in Production Engineering

Pages Range: 439-450

ISBN: 9783031183171

DOI: 10.1007/978-3-031-18318-8_45

Abstract

In the automotive sector, an important strategy for reducing CO2-
emissions is lightweight construction. In this regard, body-in-white parts offer
a high potential for weight reductions by substituting conventional steel parts
with tubular, aluminum-based components. Due to their high strength-to-weightratio
and high crashworthiness, tube profiles are often used as safety-relevant car
body components. Therefore, an exact determination of the material properties is
necessary, in order to achieve a high prediction accuracy of FE-simulations. In
contrast to the testing of flat semi-finished parts, there are only few standardized
methods for the material characterization of tubular components. Furthermore,
a profound knowledge regarding the influences of geometry and manufacturing
process of the tube profiles on the material properties has to be gained. Thus,
AA7020 tubes are analyzed in this research work. Tensile specimens are cut out
of a tube by a laser-cutting machine. As a result, the cross-section of the samples
is curved as well. To ensure a proper material testing, the clamping jaws for the
tensile test are adjusted to the curvature of the samples. For the characterization of
the tube properties, caused by the manufacturing process, optical measurements
are performed. The mechanical properties of the different grain structures are
determined by the thermo-mechanical simulator Gleeble 3500 in T6 condition.
Therefore, tensile specimens with a reduced wall thickness are prepared. Afterwards
the curved tensile samples are tested in T6 and W-temper condition. To
validate the comparability of the determined material properties, a comparison is
conducted with flat specimens prepared from the semi-finished tube profiles.

Authors with CRIS profile

Jonas Reblitz Institute of Manufacturing Technology Sebastian Wiesenmayer Institute of Manufacturing Technology Marion Merklein Institute of Manufacturing Technology

Involved external institutions

Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik (IWU) DE Germany (DE)

How to cite

APA:

Reblitz, J., Wiesenmayer, S., Trân, R., & Merklein, M. (2023). Investigation of Geometrical and Microstructural Influences on the Mechanical Properties of an Extruded AA7020 Tube. In Lecture Notes in Production Engineering. (pp. 439-450).

MLA:

Reblitz, Jonas, et al. "Investigation of Geometrical and Microstructural Influences on the Mechanical Properties of an Extruded AA7020 Tube." Lecture Notes in Production Engineering. 2023. 439-450.

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