Photomicrograph Gallery IV:

Copper Color Metallography . . .







Following are examples of annealed and cold worked copper metallography.









Click a photomicrograph to open a larger, close up view.


Figure 1.  This dendritic microstructure of sand-cast hypoeutectic Cu-4.5P was revealed when prepared by the contemporary method (Klemm's II reagent, 200X, crossed-polarized light plus sensitive tint plate.





Figure 2.   Dendritic microstructure of sand-cast hypereutectic Cu-10.5P is clearly shown when prepared by the contemporary method (Klemm's II reagent, 500X, bright field).





Figure 3.  Microstructure of Everdur, Cu-3Si-1Mn, cold drawn to half hardness, prepared by the contemporary method (Klemm's I reagent, 100X, crossed-polarized light plus sensitive tint).





Figure 4.   Microstructure of cold worked phosphor bronze, Cu-5 Sn-0.15P, prepared using the contemporary method (Klemm's II reagent, 200X, crossed-polarized light plus slight sensitive tint.





Figure 5.   Microstructure of annealed aluminum bronze, slightly hypoeutectoid, prepared by the contemporary method (equal parts NH, OH and H2O2 50X, crossed-polarized light).




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