Enhanced Coarsening Resistance of Q-phase in Aluminum alloys by the addition of Slow Diffusing Solutes

Kyoungdoc Kim, Andrew Bobel, Sung Il Baik, Mike Walker, P. W. Voorhees, G. B. Olson*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations


Here, we design thermally stable microstructures of Al3Cu2Mg9Si7 (Q) precipitates based on commercial aluminum alloy (AS7GU) for automotive applications utilizing low-diffusivity solutes in aluminum. We find that the newly developed alloys show a ~ 20% enhancement in mechanical properties at 300 °C compared to the baseline AS7GU alloy.

Original languageEnglish (US)
Pages (from-to)318-323
Number of pages6
JournalMaterials Science and Engineering A
StatePublished - Sep 26 2018



  • Aluminum alloys
  • Atom-Probe Tomography (APT)
  • Coarsening
  • Mechanical strength
  • Q-phase precipitates
  • Transmission-Electron Microscopy (TEM)

ASJC Scopus subject areas

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

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