Effects of early stages of prestretching on the aging kinetics in Al-Cu-Li-based alloy

Muna S. Khushaim

Research output: Contribution to journalArticlepeer-review


A combination of high hardness values and a low energy-consumption preparation method was used to induce the precipitation of the T1 phase in the Al alloy AA2195. This combination was obtained by subjecting the alloy samples to sequential and early stages of prestretching. Hardness testing and differential scanning calorimetry were employed to explore the behaviours of the hardness and enthalpy values as functions of the prestretching level applied before aging. Results demonstrated that the optimal aging thermomechanical conditions are (1) 150 °C for 10 h after applying prestretching levels of 0%, 1%, and 2% and (2) 150 °C for 20 h after applying prestretching levels of 3% and 4%. Under these conditions, the recorded enthalpy values for the formation of the T1 phase at prestretching levels of 0%, 1%, and 2% were 2.86, 1.72, and 1.14 J g−1, respectively and those obtained at prestretching levels of 3% and 4% were 1.43 and 1.27 J g−1, respectively.
Original languageEnglish (US)
Pages (from-to)056502
JournalMaterials Research Express
Issue number5
StatePublished - May 5 2023
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2023-05-24
Acknowledgements: Prof Osman Bakr (Professor—Material Science and engineering, King Abdullah University of Science and Technology) is gratefully acknowledged. The authors extend their appreciation to the Deputyship for Research & Innovation, Ministry of Education in Saudi Arabia for funding this research work the project number (442/144) Also the authors would like to extend their appreciation to Taibah University for its supervision support.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Polymers and Plastics
  • Surfaces, Coatings and Films


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