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Effect of Heat Treatment on Friction-Stir-Processed Nanodispersed AA7075 and 2024 Al Alloys

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Book cover Friction Stir Welding and Processing IX

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Friction stir processing (FSP) is gaining wide recognition in producing surfaces with high hardness and enhanced properties for light weight transportation application and armored vehicles. This work compares the effect of T6 peak-aging heat treatment on the toughness properties and the aging precipitation behavior of friction stir processed and nanodispersed AA2024 and AA7075 alloys. Plates of aluminum alloy AA7075-O with and without the addition of alumina nano-particles (Al2O3) of average size ~40 nm were FSP. The AA2024 nanodispersed alloys were prepared by casting, then were FSP. Combining nanodispersion and friction stir processing with peak-aged condition has shown to be an effective route in enhancing the elongation % of AA2024 alloy to double that of the T6 peak aged condition, and improving the impact toughness of AA7075 by 35% compared to the peak aged condition. The presence of nanodispersions affects the precipitation behavior of both AA2024 and AA7075 in peak aged condition, where the precipitates attach themselves to the nanoparticles and spinel type precipitates form resulting de-acceleration of the aging process.

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Authors and Affiliations

  1. Faculty of Engineering, Department of Metallurgy and Materials Engineering, Cairo University, Giza, 12316, Egypt

    I. El-Mahallawi

  2. Suez and Sinai Metallurgical and Materials Research Center of Scientific, Excellence (SSMMR-CSE), Suez University, Suez, Egypt

    M. M. Z. Ahmed

  3. Faculty of Engineering, Department of Metallurgy, Mining & Petroleum Engineering, Al-Azhar University, Cairo, 11884, Egypt

    A. A. Mahdy & W. Hoziefa

  4. Faculty of Engineering, Department of Mechanical Engineering, The British University in Egypt, El-Shorouk City, 11837, Egypt

    M. M. Z. Ahmed & M. Refat

  5. Centre for Advanced Materials, The British University in Egypt, El-Shorouk City, 11837, Egypt

    A. M. M. Abdelmotagaly

  6. Mechanical Engineering Department, Polytechnic School, University of Girona, Campus Montilivi s/n, 17071, Girona, Spain

    M. Refat

Authors
  1. I. El-Mahallawi
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  2. M. M. Z. Ahmed
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  3. A. A. Mahdy
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  4. A. M. M. Abdelmotagaly
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  5. W. Hoziefa
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  6. M. Refat
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Corresponding author

Correspondence to I. El-Mahallawi .

Editor information

Editors and Affiliations

  1. Brigham Young University , Provo, Utah, USA

    Yuri Hovanski

  2. Denton, Texas, USA

    Rajiv Mishra

  3. Tohoku University , Sendai, Japan

    Yutaka Sato

  4. Pacific Northwest National Laboratory , Richland, Washington, USA

    Piyush Upadhyay

  5. University of Wisconsin Green Bay , Green Bay, Wisconsin, USA

    David Yan

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© 2017 The Minerals, Metals & Materials Society

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El-Mahallawi, I., Ahmed, M.M.Z., Mahdy, A.A., Abdelmotagaly, A.M.M., Hoziefa, W., Refat, M. (2017). Effect of Heat Treatment on Friction-Stir-Processed Nanodispersed AA7075 and 2024 Al Alloys. In: Hovanski, Y., Mishra, R., Sato, Y., Upadhyay, P., Yan, D. (eds) Friction Stir Welding and Processing IX. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52383-5_29

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