Fig. 5: Thermal stability of migrated SGBs in the Mg-0.63 at.%Sn alloy.
From: Migration of solidification grain boundaries and prediction
a As-cast grain structures with migrated and non-migrated normal SGBs, where arrow 1 was chosen as the reference point; arrows 2–4 indicate the four SGBs that underwent migration; and arrow 5 points to a normal curved SGB that did not exhibit migration. b After annealing at 350 °C or 0.7Tsolidus for 48 h. No further migration was observed of the already migrated four SGBs (arrows 2–4), indicative of their high thermal stability. In contrast, the non-migrated curved SGB (arrow 5 in a) displayed clear migration during this annealing treatment.
