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α β - Brass 60 wt.% Cu, 40wt.% Zn
Click on regions of the micrograph for more information.
Widmanstätten microstructure can be recognised by the 'basketweave' appearance and is seen due to grain growth in preferred crystallographic directions.
The alpha phase precipitates out of solid solution from the beta phase. This example was cooled quickly in air as can be seen from the Widmanstätten microstructure.
α β - Brass 60 wt.% Cu, 40wt.% Zn
This micrograph is of a lower magnification than the sketch. The 'basket-weave' microstructure is more obvious here. See also the DoITPoMS micrograph library entry.