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.
-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 language | English |
|---|---|
| Pages (from-to) | 1063-1072 |
| Number of pages | 10 |
| Journal | Materials Research Letters |
| Volume | 11.2023 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 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