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A comparison of microstructures and mechanical properties in a Cu–Zr alloy processed using different SPD techniques

  • Nanostructured Materials
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Abstract

Experiments were conducted to evaluate the microstructures and mechanical properties of a Cu–0.1 % Zr alloy processed using two different techniques of severe plastic deformation: equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). The samples were processed at room temperature through ECAP for eight passes or through HPT for 10 turns. The results show HPT is more effective both in refining the grains and in producing a large fraction of grain boundaries having high angles of misorientation. Both procedures produce reasonably homogeneous hardness distributions but the average hardness values were higher after HPT. In tensile testing at 673 K, the highest strength and ductility was achieved after processing by HPT. This is attributed to the grain stability and high fraction of high-angle grain boundaries produced in HPT.

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Acknowledgements

This work was supported in part by the National Science Foundation of the United States under Grant No. DMR-1160966 and in part by the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS.

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Authors and Affiliations

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

    Jittraporn Wongsa-Ngam, Megumi Kawasaki & Terence G. Langdon

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

    Megumi Kawasaki

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

    Terence G. Langdon

Authors
  1. Jittraporn Wongsa-Ngam
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  2. Megumi Kawasaki
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  3. Terence G. Langdon
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Correspondence to Jittraporn Wongsa-Ngam.

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Wongsa-Ngam, J., Kawasaki, M. & Langdon, T.G. A comparison of microstructures and mechanical properties in a Cu–Zr alloy processed using different SPD techniques. J Mater Sci 48, 4653–4660 (2013). https://doi.org/10.1007/s10853-012-7072-0

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  • DOI: https://doi.org/10.1007/s10853-012-7072-0

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