A comparison of Short Fatigue Crack Growth (SFCG) rates, in a medium strength steel, under in-air and corrosion fatigue loading conditions

H. Hu*, R. Akid

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

An evaluation of the influence of the environment on the fatigue properties of an offshore structural steel has been carried out. Smooth shallow hour-glass specimens have been tested to evaluate the fatigue response (S - N curve) and fatigue crack growth rate under constant amplitude loading with a stress ratio of 0.1 in both air and 3.5% NaCl solution. CP at -950 mV/SCE was also applied for a number of corrosion fatigue tests. The generation and growth behaviour of cracks are investigated through successive observation of plastic replicas taken from the surface of the specimens at selected intervals. Fatigue cracks initiate mostly at defects such as inclusions in air, corrosion pits in 3.5%NaCl solution or artificial seawater under freely corroding conditions and surface defects and polishing micro-scratches under applied CP. The reduction in fatigue endurance caused by the presence of the corrosive environment can be partially recovered through CP.

Original languageEnglish
Title of host publicationHydrogen Effects on Material Behaviour and Corrosion Deformation Interactions - Proc. of the International Conference on Hydrogen Effects on Material Behaviour and Corrosion Deformation Interactions
EditorsN.R. Moody, A.W. Thompson, R.E. Ricker, G.S. Was, R.H. Jones
Pages617-628
Number of pages12
Publication statusPublished - 2003
EventInternational Conference on Hydrogen Effects on Material Behaviour and Corrosion Deformation Interactions - Moran, WY, United States
Duration: 22 Sept 200226 Sept 2002

Publication series

NameHydrogen Effects on Material Behaviour and Corrosion Deformation Interactions - Proc. of the International Conference on Hydrogen Effects on Material Behaviour and Corrosion Deformation Interactions

Conference

ConferenceInternational Conference on Hydrogen Effects on Material Behaviour and Corrosion Deformation Interactions
Country/TerritoryUnited States
CityMoran, WY
Period22/09/0226/09/02

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