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 hal.structure.identifier
EL MAY, Mohamed
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.author
 hal.structure.identifier
PALIN-LUC, Thierry
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
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 hal.structure.identifier
SAINTIER, Nicolas
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
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DEVOS, Olivier
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.date.accessioned2012
dc.date.available2012
dc.date.issued2012
dc.identifier.citationInternational Journal of Fatigue
dc.identifier.issn0142-1123
dc.identifier.urihttp://hdl.handle.net/10985/6515
dc.description.abstractThis paper addresses the effects of corrosion on the high cycle fatigue (HCF) strength of a high mechanical strength martensitic stainless steel (X12CrNiMoV12-3) that is used in aeronautic applications. HCF tests (between 105 and 107 cycles) were carried out in two environments: (i) in air and (ii) in an aqueous solution (pH = 6) of 0.1 M NaCl + 0.044 M Na2SO4 at a loading frequency of 120 Hz. Surface crack initiation is observed in air, whereas in solution, the crack initiated at corrosion defects. The decrease observed in the corrosion fatigue strength of specimens at 107 cycles was 33% of that of similar specimens tested in air. The electrochemical behaviour of the passive film was investigated during fatigue testing in a NaCl aqueous solution by monitoring the free potential and through electrochemical impedance spectroscopy (EIS). Based on fractography analysis and the EIS tests results, fatigue crack initiation mechanisms in air and in the NaCl aqueous solution were identified. A scenario for fatigue crack initiation is proposed based on the physical evidence. Local passive film ruptures are the cause of the corrosion fatigue crack initiation. The film is broken by material strain from the applied cyclic stress during fatigue testing, causing increased local corrosive attack. This effect has been shown at 10 Hz and 120 Hz because the characteristic time for repassivation for the steel is very low compared to the period of the cyclic loading.
dc.publisherElsevier
dc.rightsPost-print
dc.subjectcorrosion fatigue
dc.subjectstainless steel
dc.subjectsodium chloride aqueous solution
dc.subjecthigh cycle fatigue
dc.subjectelectrochemical impedance spectroscopy
dc.subjectpassive film
dc.titleEffect of Corrosion on the High Cycle Fatigue Strength of Martensitic Stainless Steel X12CrNiMoV12-3
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Bordeaux-Talence
dc.subject.halSciences de l'ingénieur: Matériaux
hal.identifierhal-00748668
hal.version1
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