Photomicrograph Database

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Artifact ID BCES 0486/1395
Negative Number NS172
Magnification 600x
Etchant AH/HP, FeCl3
Photo Date 4/18/2000


Alloy

arsenical bronze

Structure

As-cast.

Metallographic Description

2% Sn, 4% As. The microstructure is cored dendritic, which appears at low magnification to be single phase. At 600x, however, there are small bits of what may be another phase, not alpha+delta eutectoid, but perhaps peritectic. Related to the As? There is little corrosion.




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