Hydrogen enhanced cracking studies on Fe-3wt%Si single and bi-crystal microcantilevers
MetadataShow full item record
© 2017 The Author(s) Published by the Royal Society. All rights reserved. Hydrogen (H) enhanced cracking was studied in Fe-3wt%Si by means of in situ electrochemical microcantilever bending test. It was clearly shown that the presence of H causes hydrogen embrittlement (HE) by triggering crack initiation and propagation at the notch where stress concentration is existing. Additionally, the effect of carbon content and the presence of a grain boundary (GB) in the cantilever were studied. It was shown that in the presence of H the effect of carbon atom on pinning the dislocations is reduced. On the other hand, the presence of a GB, while the chemical composition of material kept constant, will promote the HE. Crack initiation and propagation occur in the presence of H, while the notch blunting was observed for both single and bicrystalline beams bent in air. Post-mortem analysis of the crack propagation path showed that a transition from transgranular fracture to intragranular fracture mechanism is highly dependent on the position of the stress concentration relative to the GB.
Showing items related by title, author, creator and subject.
Galvin, Robert (2007)Development of a hydrocarbon reservoir requires information about the type of fluid that saturates the pore space, and the permeability distribution that determines how the fluid can be extracted. The presence of fractures ...
Hazarabedian, M.S.; Viereckl, Andy; Quadir, Z.; Leadbeater, G.; Golovanevskiy, Vladimir ; Erdal, S.; Georgeson, P.; Iannuzzi, Mariano (2019)A recent subsea failure of two subsea connectors made of UNS S32760, a 25 wt% Cr super duplex stainless steel, led to an extensive root cause failure analysis. The components showed a single longitudinal crack along a ...
Hydrogen induced stress cracking of super duplex stainless steel UNS S32760 - A root cause failure investigationHazarabedian, M.S.; Viereckl, Andy; Quadir, Z.; Leadbeater, G.; Golovanevskiy, Vladimir ; Iannuzzi, Mariano ; Georgeson, P.; Erdal, S. (2019)© 2019 by NACE International. A recent subsea failure of two coupling assembly flanges made of UNS S32760, a 25 wt% Cr super duplex stainless steel, lead to an extensive root cause failure analysis. The components showed ...