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High-resolution electron microscopy on the structure of Guinier-Preston zones in an Al-1.6 mass Pct Mg2Si alloy

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Abstract

The structure of the Guinier-Preston (GP) zone in an Al-1.6 mass pct Mg2Si alloy aged at 343 and 423 K was investigated by high-resolution transmission electron microscopy (HRTEM). The morphology of the GP zone is that of a fine plate having the dimensions of a monolayer in thickness, 2.5 nm in width, and less than 30 nm in length. Its elongated direction is parallel to the 〈100〉 m direction. The chemical composition of the GP zone in an Al-Mg2Si alloy indicated a ratio of Mg/Si=1.0. The zones aggregate with increasing aging time and exhibit a more complicated morphology because of the transformation to the metastable phase that takes place inside the GP zones.

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Author notes

  1. H. Gamada (Graduate Student) & K. Fujii (Graduate Student, Researcher)

    Present address: the Department of Materials Science and Engineering, Toyama University, 930, Toyama, Japan

Authors and Affiliations

  1. the Department of Research and Development, Hokuriku Fabrication Center, Shin-Nikkei Co. Ltd., 933, Toyama, Japan

    H. Gamada (Graduate Student)

  2. the Department of Materials Science and Engineering, Toyama University, 930, Toyama, Japan

    K. Matsuda (Research Associate) & S. Ikeno (Professor)

  3. Industrial Research Institute of Ishikawa, 920-02, Ishikawa, Japan

    K. Fujii (Graduate Student, Researcher)

  4. the Research Institute for Technology, Toyama Prefectural University, 939-03, Toyama, Japan

    Y. Uetani (Associate Professor)

  5. the Department of Metallurgical Engineering, Tokyo Institute of Technology, 152, Tokyo, Japan

    T. Sato (Associate Professor) & A. Kamio (Professor)

Authors
  1. K. Matsuda
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  2. S. Ikeno
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Matsuda, K., Ikeno, S., Gamada, H. et al. High-resolution electron microscopy on the structure of Guinier-Preston zones in an Al-1.6 mass Pct Mg2Si alloy. Metall Mater Trans A 29, 1161–1167 (1998). https://doi.org/10.1007/s11661-998-0242-7

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  • DOI: https://doi.org/10.1007/s11661-998-0242-7

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