Influence of Macro-Structured Tools on the Formability of Aluminum Alloys in the Cryogenic Temperature Range

Marc Tulke; Alexander Wolf; Rémi Lafarge; Fabius Grunow; Alexander Brosius

doi:10.4028/p-nhu9o5

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Influence of Macro-Structured Tools on the Formability of Aluminum Alloys in the Cryogenic Temperature Range

Abstract:

Aluminum materials are popular materials for research in terms of lightweight construction. How cryogenic forming can be used to increase material utilization in terms of resource efficiency is one of the areas being investigated. Subject of this study are numerical and experimental investigations regarding the formability of the aluminum alloy AA6014-T4 with macro-structured deep drawing tools at cryogenic temperatures. The macro-structure of the deep drawing dies significantly reduces the heat flux between the dies and the blank due to the reduced contact area. For this reason, active cooling or heating of the dies is not required. The process of heat conduction between the tool and the blank, as well as the deep drawing process, is calculated using the FE-method and compared with the experimental investigations. In addition, the induced residual stresses are determined using the hole-drilling method and compared with the computational solution. The presented examination shows an improved deep drawing ratio of the aluminum alloy AA6014-T4 at cryogenic blank temperature without active tool cooling. Additionally, the influence of the blank temperature on the forming regarding the residual stresses in the cups is analyzed and discussed.

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Periodical:

Key Engineering Materials (Volume 926)

Pages:

760-767

DOI:

https://doi.org/10.4028/p-nhu9o5

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Online since:

July 2022

Authors:

Marc Tulke*, Alexander Wolf, Rémi Lafarge, Fabius Grunow, Alexander Brosius

Keywords:

Cryogenic Temperature, Deep Drawing, Macro-Structured Tools, Residual Stress

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Creative Commons CC BY 4.0

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* - Corresponding Author

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