Metal 3D-printing for repair of steel structures

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dc.contributor.authorGhafoori, Elyas
dc.contributor.authorDahaghin, Hamid
dc.contributor.authorDiao, Chenglei
dc.contributor.authorPichler, Niels
dc.contributor.authorLi, Lingzhen
dc.contributor.authorDing, Jialuo
dc.contributor.authorGanguly, Supriyo
dc.contributor.authorWilliams, Stewart
dc.date.accessioned2023-10-06T14:07:05Z
dc.date.available2023-10-06T14:07:05Z
dc.date.issued2023-09-12
dc.description.abstractThis work employs an innovative technique, wire arc additive manufacturing (WAAM) which is a type of directed energy deposition, for fatigue strengthening of cracked steel components. Different steel plates with a central crack were tested under high-cycle fatigue loading regime, including a reference plate, a plate repaired by WAAM with as-deposited profile, and a plate repaired by WAAM and subsequently machined to reduce stress concentration factors. Corresponding finite element simulation was conducted to provide a better understanding on the mechanism of WAAM-repair. The existing central crack in the reference plate propagated and led to a rupture after 0.94 million cycles, while those in the two WAAM-repaired plates did not propagate, due to the increased net cross-section and the compressive stresses induced by the depositing process. However, in the second plate, a new crack initiated at the root of WAAM profile as a result of local stress concentration, and the fatigue life reached 2.2 million cycles (2.3 times as the reference plate). The third plate, on the other hand, survived more than 9 million fatigue cycles with no visible degradation, thanks to its smooth machined profile. The findings of this work indicate that WAAM repair shows great potential as a technique to address fatigue-related damages in steel structures.en_UK
dc.identifier.citationGhafoori E, Dahaghin H, Diao C, et al., (2023) Metal 3D-printing for repair of steel structures. In: 10th Eurosteel Conference, 12-14 September 2023, Amsterdam, The Netherlandsen_UK
dc.identifier.urihttps://doi.org/10.1002/cepa.2285
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20343
dc.language.isoenen_UK
dc.publisherErnst & Sohn (Wiley)en_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectdirected energy depositionen_UK
dc.subjectfatigue strengtheningen_UK
dc.subject3D-printingen_UK
dc.subjectcrack arresten_UK
dc.subjectfatigue life extensionen_UK
dc.titleMetal 3D-printing for repair of steel structuresen_UK
dc.typeConference paperen_UK

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