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Enhancement of Strength and Ductility of Al-Ag Alloys Processed by High-Pressure Torsion and Aging

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Abstract

This research was conducted by the application of high-pressure torsion (HPT) to Al-X wt pct Ag alloys (X = 5, 11, 20). Grain refinement was achieved to the size of ~300 nm after HPT processing at room temperature. The aging behavior of the alloys after HPT processing was investigated using Vickers microhardness measurement, tensile testing, scanning electron microscopy, and transmission electron microscopy. This study confirms the dual effect of grain refinement and fine precipitation on the enhancement of the strength. It is also shown that at peak-aged condition, the tensile strength is enhanced while maintaining considerable ductility.

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Acknowledgments

One of the authors (SL) would like to thank the AQ program for a PhD scholarship. This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the MEXT, Japan, in innovative Areas “Bulk Nanostructured Metals,” and in part by the Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (P&P).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 819-0395, Japan

    Seungwon Lee (Academic Researcher) & Zenji Horita (Professor)

  2. WPI, International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, 819-0395, Japan

    Seungwon Lee (Academic Researcher) & Zenji Horita (Professor)

Authors
  1. Seungwon Lee
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  2. Zenji Horita
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Correspondence to Seungwon Lee.

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Manuscript submitted January 15, 2012.

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Lee, S., Horita, Z. Enhancement of Strength and Ductility of Al-Ag Alloys Processed by High-Pressure Torsion and Aging. Metall Mater Trans A 44, 3221–3231 (2013). https://doi.org/10.1007/s11661-013-1664-4

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  • DOI: https://doi.org/10.1007/s11661-013-1664-4

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