Effect of Dispersoids and Intermetallics on Hardening the Al-Si-Cu-Mg Cast Alloys

Figure 8

Bright field electron micrographs showing the progress in the size and distribution of the precipitated second phase during aging at 190ºC. (a) 2 h, (b) 200 h, (c) 1000 h, (d) dislocation/particle imteractions in condition (c), note the high dislocation density, (e) dislocation density in alloy A after solutionizing treatment, note the size of the preciptated particles in the white area, and (f) EDS spectrum corresponding to square area in (c) revealing Al and Cu peaks.

(a)

(b)

(c)

(d)

(e)

(f)