Fig. 17. SEM fractographs of the AZ91D Mg-alloy tensile parts: (a) low magnification, HPDC; (b) high magnification, HPDC; (c) low magnification, FCS Rheo-HPDC; (d) high
magnification, FCS Rheo-HPDC; (e) low magnification, FCS Rheo-HPDC + T4 treatment; (f) high magnification, FCS Rheo-HPDC + T4 treatment; (g) low magnification, FCS
Rheo-HPDC + T6 treatment and (h) high magnification, FCS Rheo-HPDC + T6 treatment.