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dc.contributor.authorMedina, Sebastián F.
dc.contributor.authorRancel, Lucia
dc.contributor.authorGómez, Manuel
dc.contributor.authorCabrera Marrero, José M.
dc.contributor.authorGutierrez, Isabel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.identifier.citationMedina, S. [et al.]. Microstructural unit controlling cleavage crack propagation in high strength bainitic steels. "Key engineering materials", Setembre 2014, vol. 622-623, p. 846-853.
dc.description.abstractThe strengthening mechanisms which are operative in bainite are very well known: small bainite packet, small width of the laths, dislocation density and size and number of carbide particles (Fe 3 C), among others. Bainite packet size has been traditionally c onsidered as the value measured by optical microscopy (OM), as electron back scattered diffraction (EBSD) technique is relatively recent. In a V - microalloyed steel with bainitic microstructure of C=0.38% , V=0.12% and N= 0.0214% the average length and width of ferrite laths and of cementite carbides were measured. On the other hand, the bainite packet size was measured by OM and EBSD with a misorientation of 15º . These values of the microstructural units have been taken in account to calculate the effective surface energy  p given by Griffith’s model for cleavage fracture. It was concluded that bainite packet size determined by EBSD with a misorientation angle crit erion of 15º was the microstructural parameter that controls cleavage crack propagation. Given the relationship between the average unit crack path (UCP) and the bainite packet size, it was concluded that the effective surface energy of cleavage fracture (  p ) would be between 71.6 and 82.6 J m - 2
dc.format.extent8 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshBainitic steel
dc.titleMicrostructural unit controlling cleavage crack propagation in high strength bainitic steels
dc.contributor.groupUniversitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorMedina, S.; Rancel, Lucia; Gómez, M.; Cabrera, J.; Gutierrez, I.
local.citation.publicationNameKey engineering materials

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