Fig. 19

Comparison of predicted PCG and grain size maps with micrographs for profile B extruded with a billet preheating temperature of 500 °C: (a) 2 mm/s, (b) 5 mm/s, (c) 10 mm/s, (d) 15 mm/s, (e) 20 mm/s. PCG formation shown in black.

Comparison of predicted PCG and grain size maps with micrographs for profile B extruded with a billet preheating temperature of 500 °C: (a) 2 mm/s, (b) 5 mm/s, (c) 10 mm/s, (d) 15 mm/s, (e) 20 mm/s. PCG formation shown in black.