Spheroidization and Coarsening of Eutectic Si Particles in Al-Si-Based Alloys

Figure 14

Changes in the size and distribution of Si particles in Sr-modified 356 alloy as a function of heating at 550°C at various times: (a) as-cast, (b) 24 h, (c) 200 h, (d) 400 h, (e) 800 h, and (f) 1200 h (white arrows point to necking).

(a)

(b)

(c)

(d)

(e)

(f)