Figure 1.

The different stages of the manufacturing process of extrusions from semi-continuous cast billets. Correlation with its corresponding microstructure: (a) after casting; (b) in the as-heat treated condition; (c) after extrusion; and (d) after anodizing. Note: Scale bars for magnification have not been included here since these micrographs are the same as those in Figure 3a,b and Figure 7a,c.