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Grain refinement and mechanical behavior of a magnesium alloy processed by ECAP

  • Ultrafine Grained Materials
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Abstract

Equal-channel angular pressing (ECAP) is an effective tool for refining the grain structure of magnesium alloys and improving the ductility at moderate temperatures. However, grain refinement in these alloys differs from other metals because new grains are formed along the boundaries of the initial structure and these newly formed grains slowly spread to consume the interiors of the larger grains in subsequent passes. A model is presented for grain refinement in magnesium alloys processed by ECAP based on the principles of dynamic recrystallization where new fine grains are formed along the initial boundaries and along twin boundaries. This model provides an explanation for a wide range of experimental data and introduces the concept of grain size engineering for achieving selected material properties in magnesium alloys.

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Acknowledgement

This study was supported by the National Science Foundation of the United States under Grant No. DMR-0855009.

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Authors and Affiliations

  1. Materials Research Group, School of Engineering Sciences, University of Southampton, Southampton, SO17 1BJ, UK

    Roberto B. Figueiredo & Terence G. Langdon

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

    Terence G. Langdon

Authors
  1. Roberto B. Figueiredo
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  2. Terence G. Langdon
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Correspondence to Terence G. Langdon.

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Figueiredo, R.B., Langdon, T.G. Grain refinement and mechanical behavior of a magnesium alloy processed by ECAP. J Mater Sci 45, 4827–4836 (2010). https://doi.org/10.1007/s10853-010-4589-y

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  • DOI: https://doi.org/10.1007/s10853-010-4589-y

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