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Tailored heat treated accumulative roll bonded aluminum blanks: failure under bending stresses

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Abstract

Ultrafine-grained accumulative roll bonded (ARB) sheet metals of aluminum alloys have a high potential for lightweight construction. The mechanical properties can be enhanced regarding strength and ductility by the combination of ARB and a local heat treatment according to the Tailor Heat Treated Blanks technology. The present investigation focuses on the failure behavior of ultrafine-grained ARB blanks. Due to the low formability of these high-strength ARB metals, a detailed understanding of the failure mechanisms is essential. For this purpose, an established approach to determine the different stages of damage of the material for conventional materials is now applied to multilayered aluminum in the as-received and heat-treated condition. In this context, air bending tests are used to qualify and quantify the bending and forming behavior of ARB sheets of AA1050A and AA6016 aluminum alloys.

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Acknowledgments

The authors gratefully acknowledge the support of the Cluster of Excellence ‘Engineering of Advanced Materials’ (EAM) and the funding of the Graduate School in Advanced Optical Technologies (SAOT) at the Friedrich-Alexander-Universität Erlangen-Nürnberg, which are funded by the German Research Foundation (DFG) within the framework of its ‘Excellence Initiative’.

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Correspondence to W. Böhm.

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Nguyen, H., Böhm, W., Tsoupis, I. et al. Tailored heat treated accumulative roll bonded aluminum blanks: failure under bending stresses. Prod. Eng. Res. Devel. 10, 399–407 (2016). https://doi.org/10.1007/s11740-016-0685-4

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  • DOI: https://doi.org/10.1007/s11740-016-0685-4

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