Abnormal Grain Growth Mechanism in the Twin-Roller Cast Al-Fe-Si Alloy in the Annealing Process

Figure 6

Growth penetrating into the semidissolved Fe-enriched coarse particles. (a) The dissolution of coarse precipitates leading to bugling of GB. (b) Zigzags at the location with partially dissolved original segregation. (c) Rapid bugling of GB into the location with high content Fe. (d) TEM micrograph of the annealed alloy.

(a)

(b)

(c)

(d)