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dc.contributor.authorRojas Gregorio, José Ignacio
dc.contributor.authorCabrera, Blai
dc.contributor.authorMusterni Girbau, Gerard
dc.contributor.authorNicolas, Jorge
dc.contributor.authorTristancho Martínez, Joshua
dc.contributor.authorCrespo Artiaga, Daniel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2016-03-16T15:23:28Z
dc.date.available2016-06-20T00:31:32Z
dc.date.issued2015-11
dc.identifier.citationRojas, J., Cabrera, B., Musterni, G., Nicolas, J., Tristancho, J., Crespo, D. Innovative NDT technique based on ferrofluids for detection of surface crack. "Journal of nondestructive evaluation", Novembre 2015, vol. 34, núm. 4, p. 1-12.
dc.identifier.issn0195-9298
dc.identifier.urihttp://hdl.handle.net/2117/84524
dc.descriptionThe final publication is available at Springer via http://dx.doi.org/10.1007/s10921-015-0309-5
dc.description.abstractAn innovative NDT technique is proposed for surface inspection of materials not necessarily magnetic or conductive, based on local magnetic field variations due to ferrofluid deposited in the cracks. The feasibility of the technique is assessed preliminarily, based on signal detectability without applied external magnetic field, and under applied DC fields. The signals (local magnetic flux density variations) are quantified analytically, experimentally and numerically. The model agrees well with the tests, showing that the signal increases with the applied field strength, up to the saturation magnetization of the ferrofluid, and decreases with the distance to the crack longitudinal axis, and thus it can provide useful estimations of the signal. The proposed technique, requiring application of external fields to magnetize the ferrofluid to enhance the signal, seems promising: the model suggests that signals associated to cracks significantly smaller than surface cracks in a target application like aircraft skin panel inspection NASA STD-5009 are easily detectable with commercial magnetometers.
dc.format.extent12 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshMetallic glasses
dc.subject.othersurface flaw
dc.subject.othermagnetic particle
dc.subject.otherferrofluid
dc.subject.otheraluminium alloys
dc.subject.othercomposite materials
dc.titleInnovative NDT technique based on ferrofluids for detection of surface crack
dc.typeArticle
dc.subject.lemacVidres metàl·lics
dc.contributor.groupUniversitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
dc.contributor.groupUniversitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai
dc.identifier.doi10.1007/s10921-015-0309-5
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://link.springer.com/article/10.1007/s10921-015-0309-5
dc.rights.accessOpen Access
local.identifier.drac17251122
dc.description.versionPostprint (author's final draft)
local.citation.authorRojas, J.; Cabrera, B.; Musterni, G.; Nicolas, J.; Tristancho, J.; Crespo, D.
local.citation.publicationNameJournal of nondestructive evaluation
local.citation.volume34
local.citation.number4
local.citation.startingPage1
local.citation.endingPage12


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