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An investigation of ductility and microstructural evolution in an Al−3% Mg alloy with submicron grain size

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Abstract

A submicrometer-grained (SMG) Al−3% Mg solid solution alloy, with an initial grain size of ∼0.2 μm, was produced by intense plastic straining. Experiments show that tensile specimens of the SMG alloy exhibit high elongations to failure at low testing strain rates at the relatively low temperature of 403 K. The stress exponent is high (∼7–8) and calculations show deformation is within the region of power-law breakdown. The initial microstructure of the alloy consists of diffuse boundaries between highly deformed grains. At strain rates of ∼10−4 s−1 and lower, plastic deformation leads to dynamic recrystallization and the formation of highly nonequilibrium grain boundaries that gradually evolve into a more equilibrated configuration.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Kyushu University, Fukuoka, 812, Japan

    Jingtao Wang, Zenji Horita, Minoru Furukawa & Minoru Nemoto

  2. Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, 450001, Russia

    Nikolai K. Tsenev & Ruslan Z. Valiev

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

    Yan Ma & Terence G. Langdon

  4. Fukuoka University of Education, Munakata, 811-41, Japan

    Minoru Furukawa

Authors
  1. Jingtao Wang
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  2. Zenji Horita
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  3. Minoru Furukawa
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  4. Minoru Nemoto
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  5. Nikolai K. Tsenev
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  6. Ruslan Z. Valiev
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  7. Yan Ma
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  8. Terence G. Langdon
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Wang, J., Horita, Z., Furukawa, M. et al. An investigation of ductility and microstructural evolution in an Al−3% Mg alloy with submicron grain size. Journal of Materials Research 8, 2810–2818 (1993). https://doi.org/10.1557/JMR.1993.2810

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  • DOI: https://doi.org/10.1557/JMR.1993.2810

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