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Influence of rolling direction on strength and ductility of aluminium and aluminium alloys produced by accumulative roll bonding

  • Ultrafine-Grained Materials
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Abstract

Sheets from commercial purity aluminium AA1050 and aluminium alloy AA6016 were processed by accumulative roll bonding to obtain an ultrafine-grained microstructure. The accumulative roll bonded samples showed a significant increase in specific strength paired with high ductility. Despite a strongly elongated grain structure, tensile testing of samples oriented 45° to the rolling direction revealed considerable improvement in elongation to failure compared to the samples oriented parallel to the rolling direction. From hydraulic bulge tests, it was observed that the accumulative roll bonded samples reached higher burst pressures and slightly lower equivalent strains in comparison to the as-received conventionally grain-sized samples. This behaviour reflects the extraordinary mechanical properties of the ultrafine-grained materials and indicates promising metal sheet formability.

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Acknowledgements

The authors thank the German Research Association (Deutsche Forschungsgemeinschaft DFG) for financial support within SFB 396, the Chair of Manufacturing Technology at the Friedrich-Alexander University Erlangen-Nürnberg, for the support and cooperation regarding bulge testing and W. Skrotzki at the Technical University of Dresden for conducting the texture measurements.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Institute I: General Materials Properties, University Erlangen-Nürnberg, Martensstr. 5, 91058, Erlangen, Germany

    Irena Topic, Heinz Werner Höppel & Mathias Göken

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  1. Irena Topic
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  2. Heinz Werner Höppel
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  3. Mathias Göken
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Correspondence to Irena Topic.

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Topic, I., Höppel, H.W. & Göken, M. Influence of rolling direction on strength and ductility of aluminium and aluminium alloys produced by accumulative roll bonding. J Mater Sci 43, 7320–7325 (2008). https://doi.org/10.1007/s10853-008-2754-3

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  • DOI: https://doi.org/10.1007/s10853-008-2754-3

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