Photomicrograph Database

Artifact ID DK 0146/0329
Negative Number NS228
Magnification 400x
Etchant AH/HP, FeCl3
Photo Date 7/7/2000


high-tin bronze


Hot-worked and quenched.

Metallographic Description

This is a beta-tin martensite. The needles are very densely layered. A thin dark ring surrounds each bit of alpha--a separate tin-rich phase? The alpha is often twinned. As one would expect from a cross-section, the alpha is not unidirectional.

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