Super Duplex Stainless Steel

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Detail focus: Transgranular Fracture clear all

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The through wall cracking was opened by citting the two sides and the aspect was characterized by SEM. Although there was a film at the fracture surface, probably because the fitting was removed from service some time after it was leaking, the fracture micromechanism is by quasecleavage, typical of a stress corrosion cracking.
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ML00094 / Sep.2017
MIC of a Subsea Hydraulic Line
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Behavior
Cm - Fractography by SEMDf - Transgranular Fracture