Photomicrograph Database

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Artifact ID DK 0255A/0400
Negative Number NS248
Magnification 100x
Etchant nital 2%
Photo Date 7/24/2000


Alloy

iron

Structure

Metallographic Description

Pearlite near some edges, ferrite in the middle and along a few edges. In the densest pearlite the carbon content is ~.05%. In this cross-section view, the slag stringers are just dots. At 600x the pearlite shows evidence of partial spheroidization (lamellar plates become round dots), which indicates that this was either held several hours just below the pearlite transformation temperature or reheated to this temperature for several hours.


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