Fig. 4: SGBM at different cooling rates.
From: Migration of solidification grain boundaries and prediction
a An as-cast cone-shaped Mg-0.63 at.%Sn (3 wt.%Sn) specimen. b–d Grain structures at each specified position in the cone-shaped specimen (a). e–g Closer views of the SGBM in the grain structures at each specified position. Arrow 1 in each micrograph points to the initial SGB position while Arrow 2 indicates the observed SGB position. The cross-sectional diameters are 6.5 mm at b, 3.0 mm at c and 0.5 mm at d. The corresponding cooling rates are 54 °C/s at b, 166 °C/s at c and 1690 °C/s at d (Table 1).
