Mechanical properties and microstructural evolution in Al–Cu–Mg–Ag alloy with a CuxMgx/10 content

Hyeongsub So, Sung Jae Won, Jihoon Park, Soong Ju Oh, Leeseung Kang, Kyou Hyun Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In this study, we investigate the effect of CuxMgx/10 (x = 5.0, 5.5, 6.0, 6.8 wt.%) in Al–Cu–Mg-based alloys on the mechanical properties. Of these, the Cu6.0Mg0.60 alloy shows the highest mechanical properties of σUTS = 532 MPa (σy = 504 MPa) and ε = 11.1%. The amount of CuxMgx/10 solutes affects both macroscopic and microscopic microstructures of fabricated alloys. In the macroscopic observation, a higher content of CuxMgx/10 induces the grain size refinement and the formation of large particles in the grain boundaries. For the microscopic investigation using electron microscopies, the formation of θ′ strengthening phase is more accelerated by a higher content of CuxMgx/10 rather than the formation of Ω phase. Furthermore, microscopic structural distortion is significantly induced with a higher content of CuxMgx/10, which affects the tensile properties of the developed alloys.

Original languageEnglish
Article number141573
JournalMaterials Science and Engineering A
Publication statusPublished - 2021 Sep 8


  • 2xxx series aluminum alloy
  • Mechanical properties
  • Microstructural investigation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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