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International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions

Editor
B. P. Somerday
B. P. Somerday
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P. Sofronis
P. Sofronis
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ISBN:
9780791860298
No. of Pages:
844
Publisher:
ASME Press
Publication date:
2014

A study has been carried out in order to verify if the Hyper Duplex Stainless Steel (HDSS) could suffer HISC like its predecessor, the super duplex stainless steel (SDSS). The HDSS tubes in as-received condition were cathodically charged for 160 h in artificial seawater, under tensile stress, using different cathodic currents in each sample. The charged tubes were submitted to tensile test and their susceptibility to Hydrogen Induced Stress Cracking (HISC) was assessed, as well as an examination of fracture surface. Hydrogen-induced phase transformation was studied by XRD. The γ→α’ transformation was the dominant hydrogen-induced phase transformation in HDSS. The HDSS showed a higher resistance against HISC in comparison with the SDSS. In summary, under these conditions, the results show that the HDSS underwent hydrogen embrittlement.

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