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Optimization of the Mechanical Properties and Residual Stresses in 2024 Aluminum Alloy Through Heat Treatment

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Abstract

Residual stresses induced during quenching of aluminum alloys cause dimensional instability and distortion. In this study, the effects of different concentrations of polyalkylene glycol (PAG) quenchants on residual stresses and mechanical properties of 2024 aluminum alloy were investigated. Surface residual stresses were measured by using hole-drilling strain-gauge method. Also, mechanical properties and microstructure of the heat-treated samples were analyzed using hardness measurements, tensile tests, and transmission electron microscopy. Results showed that quenching into a 15% polymeric solution and aging at 190 °C for 12 h cause 50% reduction in residual stress as compared with quenching in water at 20 °C and naturally aging. Moreover, tensile strength decreased by 104 MPa (~ 20%) in compared with the T6 sample.

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Authors and Affiliations

  1. Department of Materials Engineering, Malek Ashtar University of Technology, Isfahan, Iran

    M. Araghchi, H. Mansouri & R. Vafaei

  2. Materials and Surface Science Institute, University of Limerick, Limerick, Ireland

    Y. Guo

Authors
  1. M. Araghchi
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  2. H. Mansouri
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  3. R. Vafaei
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  4. Y. Guo
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Correspondence to H. Mansouri.

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Araghchi, M., Mansouri, H., Vafaei, R. et al. Optimization of the Mechanical Properties and Residual Stresses in 2024 Aluminum Alloy Through Heat Treatment. J. of Materi Eng and Perform 27, 3234–3238 (2018). https://doi.org/10.1007/s11665-018-3400-0

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  • DOI: https://doi.org/10.1007/s11665-018-3400-0

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