Development of a high-strength Al-Zn-Mg-Cu-based alloy via multi-strengthening mechanisms

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

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We develop high-strength of Al-Zn-Mg-Cu-based alloys (7xxx series) by optimizing the amount of Mg/Cu with a trace addition of Sc. The highest mechanical properties are achieved with σUTS=672 MPa (σy=644 MPa) and ε=8.6%. Based on quantitative symmetry measurements, the improved mechanical strength originates from nanoscopic structural distortion caused by the excessive solutes of Mg and Cu as the amount of Mg/Cu increases. In addition, Sc microalloying induces grain refinement, thus enhancing the mechanical properties.

Original languageEnglish
Article number114216
JournalScripta Materialia
Publication statusPublished - 2021 Dec


  • 7xxx Series aluminum alloy
  • Mechanical properties
  • Microalloying
  • Symmetry quantification

ASJC Scopus subject areas

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


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