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Cokey center, pits, and dendritic pattern - Forging defects


Figure 1: Hot-acid etching of this disc from an AISI 1050 billet revealed a "cokey" center, inclusion pits, and a dendritic pattern.

Defect name: "Cokey" center, pits, and dendritic pattern
Record No.: 3270
Type of defect (Internal/Surface): Internal
Defect classification: Forging defects
Steel name: AISI 1050 steel
Steel composition in weight %: No data.
Note:  Macroetching. Figure 1 shows a "cokey" center, pits, and a well-defined dendritic pattern in a disc of carbon steel.
Reference: Not shown in this demonstration version.