Precipitation behaviour in AlMgZnCuAg crossover alloy with coarse and ultrafine grains

Patrick Willenshofer, Matheus Tunes, Christina Laura Kainz, Oliver Renk, Thomas M. Kremmer, Stefan Gneiger, Peter J. Uggowitzer, Stefan Pogatscher

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung


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.
Seiten (von - bis)1063-1072
FachzeitschriftMaterials Research Letters
PublikationsstatusVeröffentlicht - 2 Dez. 2023

Research Field

  • Casting Processes for High Performance Materials

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