Photomicrograph Database

Artifact ID DK 0302/0457
Negative Number NS279
Magnification 600x
Etchant Marshall's and 2% nital
Photo Date 12/22/2000

Alloy

iron

Structure

Metallographic Description

Heterogeneous structure: a mixture of carburized regions and regions of pure ferrite. The carbon content varies from 0-0.7% across the sample. The carbon-rich areas are anomalous, in that they have the appearance of bainite. The ferrite within the the carburized region and in the grain boundaries has a Widmanst├Ątten structure, indicating a rapid cooling from high temperatures.








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