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Influence of pressing speed on microstructural development in equal-channel angular pressing

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Abstract

The influence of pressing speed in equal-channel angular (ECA) pressing was investigated using samples of pure Al and an Al-1 pct Mg alloy and a range of pressing speeds from ∼10−2 to ∼10 mm s−1. The results show that the speed of pressing has no significant influence on the equilibrium grain size, at least over the range used in these experiments. Thus, the equilibrium grain sizes were ∼1.2 µm for pure Al and ∼0.5 µm for the Al-1 pct Mg alloy for all pressing conditions. However, it is shown that the nature of the microstructure is dependent on the pressing speed, because recovery occurs more easily at the slower speeds, so that the microstructure is then more equilibrated. There is also indirect evidence for the advent of frictional effects when the cross-sectional dimensions of the samples are at or below ∼5 mm.

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Author notes

  1. Patrick B. Berbon (Research Assistant, Member of Technical Staff)

    Present address: Departments of Materials Science and Mechanical Engineering, University of Southern California, 90089-1453, Los Angeles, CA

Authors and Affiliations

  1. Structural Metals Division, MS-A25, Rockwell Science Center, 91360, Thousand Oaks, CA

    Patrick B. Berbon (Research Assistant, Member of Technical Staff)

  2. the Department of Technology, Fukuoka University of Education, Munakata, 811-4192, Fukuoka, Japan

    Minoru Furukawa (Associate Professor)

  3. the Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, 812-8581, Fukuoka, Japan

    Zenji Horita (Associate Professor) & Minoru Nemoto (Professor)

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

    Terence G. Langdon (Professor)

Authors
  1. Patrick B. Berbon
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  2. Minoru Furukawa
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  3. Zenji Horita
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  4. Minoru Nemoto
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  5. Terence G. Langdon
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Berbon, P.B., Furukawa, M., Horita, Z. et al. Influence of pressing speed on microstructural development in equal-channel angular pressing. Metall Mater Trans A 30, 1989–1997 (1999). https://doi.org/10.1007/s11661-999-0009-9

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  • DOI: https://doi.org/10.1007/s11661-999-0009-9

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