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dc.contributor.authorMejía, Ignacio
dc.contributor.authorAltamirano, G.
dc.contributor.authorBedolla Jacuinde, Arnoldo
dc.contributor.authorCabrera Marrero, José M.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2014-03-27T11:34:36Z
dc.date.created2013-11
dc.date.issued2013-11
dc.identifier.citationMejía, I. [et al.]. Effect of boron on the hot ductility behavior of a low carbon advanced ultra-high strength steel (A-UHSS). "Metallurgical and materials transactions A-Physical metallurgy and material", Novembre 2013, vol. 44, núm. 11, p. 5165-5176.
dc.identifier.issn1073-5623
dc.identifier.urihttp://hdl.handle.net/2117/22408
dc.description.abstractThis research work studied the effect of boron additions (14, 33, 82, 126, and 214 ppm) on the hot ductility behavior of a low carbon advanced ultra-high strength steel. For this purpose, specimens were subjected to a hot tensile test at different temperatures [923 K, 973 K, 1023 K, 1073 K, 1173 K, and 1273 K (650 °C, 700 °C, 750 °C, 800 °C, 900 °C, and 1000 °C)] under a constant true strain rate of 10-3 s-1. The reduction of area (RA) of the tested samples until fracture was taken as a measure of the hot ductility. In general, results revealed a marked improvement in hot ductility from 82 ppm B when the stoichiometric composition for BN (0.8:1) was exceeded. By comparing the ductility curve of the steel with the highest boron content (B5, 214 ppm B) and the curve for the steel without boron (B0), the increase of hot ductility in terms of RA is over 100 pct. In contrast, the typical recovery of hot ductility at temperatures below the Ar3, where large amounts of normal transformation ferrite usually form in the structure, was not observed in these steels. On the other hand, the fracture surfaces indicated that the fracture mode tends to be more ductile as the boron content increases. It was shown that precipitates and/or inclusions coupled with voids play a meaningful role on the crack nucleation mechanism, which in turn causes hot ductility loss. In general, results are discussed in terms of boron segregation and precipitation on austenitic grain boundaries during cooling from the austenitic range and subsequent plastic deformation.
dc.format.extent12 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshMetals Ductility
dc.subject.lcshStrength of materials
dc.subject.lcshSteel Heat treatment
dc.titleEffect of boron on the hot ductility behavior of a low carbon advanced ultra-high strength steel (A-UHSS)
dc.typeArticle
dc.subject.lemacResistència de materials
dc.subject.lemacAcer -- Tractament tèrmic
dc.contributor.groupUniversitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
dc.identifier.doi10.1007/s11661-013-1870-0
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac13640136
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorMejía, I.; Altamirano, G.; Bedolla-Jacuinde, A.; Cabrera, J.
local.citation.publicationNameMetallurgical and materials transactions A-Physical metallurgy and material
local.citation.volume44
local.citation.number11
local.citation.startingPage5165
local.citation.endingPage5176


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