Photomicrograph Database

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Artifact ID BC 2208/0918
Negative Number NS151
Magnification 200x
Etchant AH/HP, FeCl3
Photo Date 7/14/2000

Photomicrograph Description

Beta-tin martensite with alpha found intra- and intergranularly. Longitudinal view. High-tin.

Alloy

high-tin bronze

Structure

Hot-worked and quenched.

Metallographic Description

The specimen is extensively corroded. Transverse: Alpha with many martensitic needles in a dark matrix. Longitudinal: Very heavily needled. Almost the only matrix, or beta, visible is in a fringe around the alpha. The alpha is longitudinal in most of the sample, but not in some places. In those areas, the alpha outlines the grain boundaries. High-tin bronze.




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