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In-situ SEM study of fatigue micro-crack initiation and propagation behavior in pre-corroded AA7075-T7651

dc.contributor.authorSong, Haipeng
dc.contributor.authorLiu, Changchun
dc.contributor.authorZhang, Hao
dc.contributor.authorDu, Juan
dc.contributor.authorYang, Xudong
dc.contributor.authorLeen, Sean B.
dc.date.accessioned2020-08-27T12:28:22Z
dc.date.issued2020-04-18
dc.identifier.citationSong, Haipeng, Liu, Changchun, Zhang, Hao, Du, Juan, Yang, Xudong, & Leen, Sean B. (2020). In-situ SEM study of fatigue micro-crack initiation and propagation behavior in pre-corroded AA7075-T7651. International Journal of Fatigue, 137, 105655. doi: https://doi.org/10.1016/j.ijfatigue.2020.105655en_IE
dc.identifier.issn0142-1123
dc.identifier.urihttp://hdl.handle.net/10379/16147
dc.description.abstractFatigue micro-cracking behavior in pre-corroded AA7075-T7651 is analyzed by in-situ scanning electron microscopy (SEM) observation and SEM-based fractography. The experimental results show that (i) fatigue microcracks nucleated mainly from inclusions at the specimen notch and from corrosion pits on the specimen surface, (ii) pre-corrosion severity degree and maximum stress level significantly affected the extent and time of microcrack initiation. Corrosion pits are shown to play a crucial role in fatigue micro-crack propagation, due to crack deflection (light corrosion) and crack coalescence (severe corrosion). The growth rate of minor cracks was suppressed by pre-dominant rapid propagation of the main crack.en_IE
dc.description.sponsorshipThis research was supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 11972364, 11502285 and 51971242), the Science Foundation Ireland (SFI, Grant No. 14/IA/2604) and the Fundamental Research Funds for the Central Universities (FRFCU, Grant No. 3122014H006).en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofInternational Journal Of Fatigueen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectCORROSION-FATIGUEen_IE
dc.subjectGROWTH-BEHAVIORen_IE
dc.subjectLIFE PREDICTIONen_IE
dc.subjectALLOYen_IE
dc.subjectMODELen_IE
dc.subjectPITen_IE
dc.subject2024-T3en_IE
dc.subject7075-T6en_IE
dc.subjectAIRen_IE
dc.titleIn-situ SEM study of fatigue micro-crack initiation and propagation behavior in pre-corroded AA7075-T7651en_IE
dc.typeArticleen_IE
dc.date.updated2020-08-27T06:52:02Z
dc.identifier.doi10.1016/j.ijfatigue.2020.105655
dc.local.publishedsourcehttps://doi.org/10.1016/j.ijfatigue.2020.105655en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderNational Natural Science Foundation of Chinaen_IE
dc.contributor.funderScience Foundation Irelanden_IE
dc.contributor.funderFundamental Research Funds for the Central Universitiesen_IE
dc.description.embargo2022-04-18
dc.internal.rssid21311626
dc.local.contactSean Leen, Mechanical & Biomedical Eng, Eng-2051, New Engineering Building, Nui Galway. 5955 Email: sean.leen@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
dcterms.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2604/IE/Multi-scale, Through-process Chracterisation for Innovative Manufacture of Next-generation Welded Connections (MECHANNICS)/en_IE
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland