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Cooling rate as a process parameter in advanced roll forming to tailor microstructure, mechanical and corrosion properties of EN AW 7075 tubes

Sajadifar, Seyed Vahid ; Suckow, Timon ; Heider, Ben ; Oechsner, Matthias ; Groche, Peter ; Niendorf, Thomas (2023)
Cooling rate as a process parameter in advanced roll forming to tailor microstructure, mechanical and corrosion properties of EN AW 7075 tubes.
In: Materials Science & Engineering Technology : Materialwissenschaft und Werkstofftechnik, 2022, 53 (12)
doi: 10.26083/tuprints-00023709
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Item Type: Article
Type of entry: Secondary publication
Title: Cooling rate as a process parameter in advanced roll forming to tailor microstructure, mechanical and corrosion properties of EN AW 7075 tubes
Language: English
Date: 27 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2022
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Materials Science & Engineering Technology : Materialwissenschaft und Werkstofftechnik
Volume of the journal: 53
Issue Number: 12
DOI: 10.26083/tuprints-00023709
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

The effects of solution heat treatment parameters and quench media as a processing tool for tailoring microstructure, mechanical and corrosion properties in roll forming of EN AW 7075 alloy were studied. The highest yield stress and ultimate tensile strength were obtained for the specimens quenched in water, while the air‐cooled specimens exhibited inferior mechanical properties. Microstructural analysis of specimens showed that except water‐quenched specimens, the parts cooled/quenched in oil, in direct contact with tool steel and air are characterized by coarse precipitates and precipitate‐free zones. The corrosion tests showed that the cooling rate has a pronounced influence on the corrosion resistance and related mechanism of EN AW 7075 alloy. The surfaces of specimens quenched in water remained intact although pitting corrosion took place. The microstructure of the part processed by roll forming was explored in direct comparison. It is revealed that by the employment of quenching nozzles, a high cooling rate similar to the water‐quenched condition can be achieved. Results obtained in the present study pave the way to directly tailor aluminum parts for specific applications.

Uncontrolled Keywords: High-strength aluminum alloys, corrosion behavior, heat treatment, microstructure, fracture
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-237094
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Center for Engineering Materials, State Materials Testing Institute Darmstadt (MPA) Chair and Institute for Materials Technology (IfW)
16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Date Deposited: 27 Nov 2023 13:58
Last Modified: 05 Jan 2024 08:20
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23709
PPN: 514465913
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