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dc.contributor.authorAlvaro, Antonio
dc.contributor.authorWan, Di
dc.contributor.authorOlden, Vigdis
dc.contributor.authorBarnoush, Afrooz
dc.identifier.citationProcedia Structural Integrity. 2018, 13 1514-1520.nb_NO
dc.description.abstractIt is well known that the presence of hydrogen in ferrous materials promotes both static fracture and affect the material fatigue crack growth rates. The latter is often referred to as Hydrogen Enhanced Fatigue Crack Growth Rate (HE-FCGR) which defines the reduction of crack growth resistance of the material under cyclic stresses when hydrogen is present. When it comes to the determination of the life of components exposed to hydrogen it is therefore of paramount importance to establish such hydrogen induced variation in crack speed in the material in order to avoid unexpected catastrophic failures. In this study the fatigue crack growth rate was determined for a Fe-3wt%Si alloy. Compact tension specimens were used to determine the Paris regime of the fatigue crack growth rate curve of the material. Two environmental conditions were investigated: laboratory air and in-situ electrochemically charged hydrogen. Different mechanical conditions, in terms of load ratio (R=0.1 and R=0.5) and test frequency (f=0.1 Hz, 1 Hz and 10 Hz), were used under electrochemically charged hydrogen conditions. The results show that compared to the specimens tested in air, there is a clear detrimental effect of H for the specimens tested in hydrogen, in terms of accelerated crack growth. The strength of the impact of hydrogen in enhancing the fatigue crack growth rates of the Fe-3wt%Si alloy clearly depends on the test conditions. Fractographic investigations were also used to unveil the mechanisms involved in the process leading to accelerate crack growth in presence of hydrogen.nb_NO
dc.publisherElsevier Science Directnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectFatigue Crack Growthnb_NO
dc.subjectHydrogen Embrittlementnb_NO
dc.titleHydrogen Enhanced Fatigue Crack Growth Rates in a Ferritic Fe-3wt%Si Alloynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewed
dc.rights.holderThis article is available under the Creative Commons CC-BY-NC-ND license and permits non-commercial use of the work as published, without adaptation or alteration provided the work is fully attributed. For commercial reuse, permission must be requested below.nb_NO
dc.source.journalProcedia Structural Integritynb_NO
dc.relation.projectNorges forskningsråd: 244068nb_NO
cristin.unitnameMaterialer og nanoteknologi

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal