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Achieving enhanced ductility in a dilute magnesium alloy through severe plastic deformation

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Abstract

Experiments were conducted to evaluate the utility of a new processing procedure developed for Mg-based alloys in which samples are subjected to a two-step processing route of extrusion followed by equal-channel angular pressing (designated as EX-ECAP). The experiments were conducted using a Mg-0.6 wt pct Zr alloy and, for comparison purposes, samples of pure Mg. It is shown that the potential for successfully using ECAP increases in both materials when adopting the EX-ECAP procedure. For the Mg-Zr alloy, the use of EX-ECAP produces a grain size of ∼1.4 µm when the pressing is undertaken at 573 K. By contrast, using EX-ECAP with pure Mg at 573 K produces a grain size of ∼26 µm. Tensile testing of the Mg-Zr alloy at 523 and 573 K after processing by EX-ECAP revealed the occurrence of significantly enhanced ductilities with maximum elongations of ∼300 to 400 pct.

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Authors and Affiliations

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

    Kiyoshi Matsubara (Graduate Student), Yuichi Miyahara (Graduate Student) & Zenji Horita (Professor)

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

    Terence G. Langdon (Professor)

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  1. Kiyoshi Matsubara
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  2. Yuichi Miyahara
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  3. Zenji Horita
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  4. Terence G. Langdon
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Matsubara, K., Miyahara, Y., Horita, Z. et al. Achieving enhanced ductility in a dilute magnesium alloy through severe plastic deformation. Metall Mater Trans A 35, 1735–1744 (2004). https://doi.org/10.1007/s11661-004-0082-z

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  • DOI: https://doi.org/10.1007/s11661-004-0082-z

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