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Fabrication of submicrometer-grained Zn–22% Al by torsion straining

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Abstract

The Zn–22% Al eutectoid alloy is capable of exhibiting very high superplastic elongations, in excess of 2000% in tension, when the grain size is in the range of ~1–10 μm. This paper describes the fabrication of a submicrometer grain size in the Zn–22% Al alloy by subjecting the samples to intense plastic straining in torsion under high pressure (~5 GPa) at room temperature. Observations after straining revealed a heterogeneous microstructure with grain sizes in the range of ~0.1–0.5 μm. As a result of the low melting temperature of the alloy, the high internal stresses introduced by torsion straining are relaxed and the grain boundaries are close to an equilibrium configuration.

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Authors and Affiliations

  1. Department of Technology, Fukuoka University of Education, Munakata, Fukuoka, 811-41, Japan

    Minoru Furukawa

  2. Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 812-81, Japan

    Zenji Horita & Minoru Nemoto

  3. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, 450000, Russia

    Ruslan Z. Valiev

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

    Terence G. Langdon

Authors
  1. Minoru Furukawa
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  2. Zenji Horita
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  3. Minoru Nemoto
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  4. Ruslan Z. Valiev
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  5. Terence G. Langdon
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Furukawa, M., Horita, Z., Nemoto, M. et al. Fabrication of submicrometer-grained Zn–22% Al by torsion straining. Journal of Materials Research 11, 2128–2130 (1996). https://doi.org/10.1557/JMR.1996.0270

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  • DOI: https://doi.org/10.1557/JMR.1996.0270

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