Photomicrograph Database

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Artifact ID BC 0652/0912
Negative Number 1607
Magnification 100x
Etchant FeCl3, AH/HP
Photo Date 8/2/1992


Alloy

bronze or copper

Structure

As-cast.

Metallographic Description

Dendritic with grain boundaries forming and a good deal of shrinkage voiding and interdendritic corrosion. Some mechanical twins or strain markings can be seen at high magnification, suggesting that there was some plastic deformation after casting. Cast, fairly slow cooling, a little work or post-production stress of some kind.




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