Precipitation behaviour in AlMgZnCuAg crossover alloy with coarse and ultrafine grains

Patrick Willenshofer, Matheus Araujo Tunes, Christina Kainz, Oliver Renk, Thomas Kremmer, Stefan Gneiger, Peter Uggowitzer, Stefan Pogatscher

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Crossover aluminium alloys have recently been introduced as a new class of coarse-grained age-hardenable alloys. Here, we study the evolution of precipitation of the T-phase — Mg32(Zn,Al)49
-phase — in a 5xxx/7xxx crossover alloy with coarse- and ultrafined microstructures. Both alloys were examined using differential scanning calorimetry, X-ray diffraction and in situ transmission electron microscopy. The ultrafine-grained alloy revealed significant different and accelerated precipitation behaviour due to grain boundaries acting as fast diffusion paths. Additionally, the ultrafine-grained alloy revealed high resistance to grain growth upon heating, an effect primarily attributed to inter-granular precipitation synergistically with trans-granular precipitation of T-phase.
Original languageEnglish
Pages (from-to)1063-1072
Number of pages10
JournalMaterials Research Letters
Volume11.2023
Issue number12
DOIs
Publication statusPublished - 15 Nov 2023

Bibliographical note

Publisher Copyright:
© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Keywords

  • DSC
  • in situ transmission electron microscopy
  • Precipitation of T-phase ()
  • ultrafine-grained aluminium crossover alloys
  • XRD

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