Flow behavior and mechanical properties of multi-pass thermomechanically processed 7075 Al-alloy

Eman El-Shenawy, Ahmed I. Z. Farahat, Adham E. Ragab, Ahmed Elsayed, Reham Reda

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Research on multi-pass hot processing of 7075 Al-alloy was rarely discussed. This study aims to design and evaluate different thermomechanical processing strategies (TMPS) to produce 3 mm-thick sheets of 7075 Al-alloy. A physical simulation was performed using the hot compression test of a Gleeble 3500 to study flow mechanisms and microstructural evolution, while an experimental investigation was carried out using a rolling mill to examine the effect of TMPS on the mechanical properties. Four hot forming strategies were designed and tested at a constant strain rate of 0.1 s−1 over a temperature range of 200–450 °C. These strategies involved applying a constant amount of deformation of 65–70% in single (SP), double (DP), triple (TP), and quadruple (QP) passes of thermomechanical processing to study the influence of multi-pass thermomechanical processing on the final mechanical properties and industrial feasibility. The microstructure analysis showed a significant refinement and more uniform distribution of precipitates with an increasing number of passes, as observed through optical micrographs and the full width at half maximum (FWHM)-position relationship of XRD data. The results indicate that QP is the optimum strategy for producing the best mechanical properties in the shortest production time.
Original languageEnglish
Article number1158
Number of pages20
Issue number7
Publication statusPublished - 22 Jun 2023


  • 7075 Al-alloy
  • Gleeble physical simulation
  • flow mechanism
  • multi-pass thermomechanical processing
  • mechanical properties
  • industrial feasibility


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