Photomicrograph Database

Artifact ID BC 0713/0893A
Negative Number 1525
Magnification 100x
Etchant AH/HP
Photo Date 1/6/1993

Metallographic Description

At 100x, the structure is of highly corroded cored dendrites. Blue-gray inclusions are concentrated in the interdendritic zones and in the shrinkage and corrosion voids. Twinned redeposited copper can be seen in some voids. At 600x, the metal becomes a mosaic of tiny grains filled with strain lines and twins. Some of the twins are bent. Grain size varies and working is more evident near the edges.

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