Dissimilar joints between ferritic steels and nickel alloys are used in many subsea applications, typically without problems, but cracking at the interface may arise when hydrogen is present. The paper includes the results of constant load, step load and slow strain rate tests on tensile specimens, with and without notches, and slow strain rate fracture mechanics tests on notched bend specimens, all under cathodic charging in simulated seawater. Specimens were taken from an 8630 forging welded with nickel alloy 625 and 725 consumables.

Subject
Materials, Cathodic protection, Nickel based alloys, Notches, Seawater, Joints, Mechanical failure, Interfaces, Stainless steel, Fracture, Alloys, Slow strain rate technique, Hydrogen
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2008
Association for Materials Protection and Performance (AMPP)
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