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Microstructural evolution and the mechanical properties of an aluminum alloy processed by high-pressure torsion

  • Ultrafine Grained Materials
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Abstract

Processing by high-pressure torsion (HPT) was performed on disks of an Al-7075 alloy at room temperature. The alloy was initially annealed at 753 K and then processed by HPT under a pressure of 6.0 GPa up to a maximum of ten turns. Measurements of the Vickers microhardness showed lower values at the centers of the disks after small numbers of turns but higher numbers of turns led to a reasonable hardness homogeneity across each disk. After five turns, the grain size at the edge of the disk was ~250 nm. It is demonstrated that results from mechanical testing are consistent with the hardness and microstructural data.

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Acknowledgements

This work was supported in part by the National Science Foundation of the United States under Grant No. DMR-0855009 and in part by the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS.

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Authors and Affiliations

  1. Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089-0241, USA

    Shima Sabbaghianrad

  2. Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089-1453, USA

    Megumi Kawasaki & Terence G. Langdon

  3. Division of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul, 133-791, South Korea

    Megumi Kawasaki

  4. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK

    Terence G. Langdon

Authors
  1. Shima Sabbaghianrad
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  2. Megumi Kawasaki
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  3. Terence G. Langdon
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Correspondence to Shima Sabbaghianrad.

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Sabbaghianrad, S., Kawasaki, M. & Langdon, T.G. Microstructural evolution and the mechanical properties of an aluminum alloy processed by high-pressure torsion. J Mater Sci 47, 7789–7795 (2012). https://doi.org/10.1007/s10853-012-6524-x

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  • DOI: https://doi.org/10.1007/s10853-012-6524-x

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