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Entrapped gas, heavy segregation, voids, and ingot pattern - Forging defects


Figure 1: Hot-acid etching of this disc from an AISI 4140 alloy steel billet revealed entrapped gas, heavy segregation, voids, and ingot pattern.

Defect name: Entrapped gas, heavy segregation, voids, and ingot pattern
Record No.: 3268
Type of defect (Internal/Surface): Internal
Defect classification: Forging defects
Steel name: AISI 4140 steel
Steel composition in weight %: No data.
Note:  Macroetching. In Figure 1 the standard hot etching has revealed entrapped gas, heavy segregation, voids, and ingot pattern in a disc of AISI4140 alloy steel.
Reference: Not shown in this demonstration version.