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Effects of semi-solid thermomechanical processing on microstructure and mechanical properties of Al 2024

  • Hamzeh NeginiEmail author
  • Amin Rezaei
  • Mahmoud Hajisafari
  • Hossein Momeni
Technical Paper
  • 8 Downloads

Abstract

A thermomechanical processing (TMP) method consisting of annealing, cold working, and partial remelting was employed to modify the microstructure and mechanical properties of Al 2024 alloy. The effects of the semi-solid temperature and holding time at the semi-solid temperature on the microstructure of the alloy were studied. The results showed that the optimum parameters were 610 °C and 7 min. Also, T6 heat treatment was applied to the thermomechanical processed alloy with the best combination of the parameters to examine its effect on the characteristics of the alloy. The results revealed that the amounts of yield strength and ultimate tensile strength increased, but T6 heat treatment did not have any remarkable effect on the tensile properties of the thermomechanical processed sample but improved the hardness of the alloy. In addition, the fracture mode in the thermomechanical processed sample was ductile while in the sample that underwent T6, brittle fracture was dominant.

Keywords

Semi-solid Thermomechanical 2024 alloy Partial remelting 

Notes

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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  • Hamzeh Negini
    • 1
    • 3
    Email author
  • Amin Rezaei
    • 1
  • Mahmoud Hajisafari
    • 2
  • Hossein Momeni
    • 1
  1. 1.Metallic Materials CenterMalek Ashtar University of TechnologyTehranIran
  2. 2.Department of Metallurgical and Materials Engineering, Yazd BranchIslamic Azad UniversityYazdIran
  3. 3.Malek Ashtar University of TechnologyTehranIran

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