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dc.contributor.authorFrómeta Gutiérrez, David
dc.contributor.authorCuadrado Lafoz, Nuria
dc.contributor.authorRehrl, Johannes
dc.contributor.authorSuppan, Clemens
dc.contributor.authorDieudonné, Thomas
dc.contributor.authorDietsch, Pascal
dc.contributor.authorCalvo Muñoz, Jessica
dc.contributor.authorCasellas Padró, Daniel
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Ciència i Enginyeria dels Materials
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC
dc.date.accessioned2021-02-02T13:13:12Z
dc.date.available2021-02-02T13:13:12Z
dc.date.issued2021-01-20
dc.identifier.citationFrómeta, D. [et al.]. Microstructural effects on fracture toughness of ultra-high strength dual phase sheet steels. "Materials science and engineering A. Structural materials properties microstructure and processing", 20 Gener 2021, núm. 802, p. 140631.
dc.identifier.issn0921-5093
dc.identifier.urihttp://hdl.handle.net/2117/336707
dc.description.abstractThe influence of the microstructure on the fracture toughness of two industrially processed 1000 MPa dual-phase (DP) steel grades is investigated. Crack initiation and propagation resistance are evaluated by means of the essential work of fracture (EWF) methodology and the main damage and fracture mechanisms are investigated. The results are discussed in terms of the proportion and distribution of the different microstructural constituents, which is assessed by scanning electron microscopy (SEM), high-resolution electron backscatter diffraction (HR-EBSD) and nanoindentation hardness measurements. The investigations show that strain-induced transformation of retained austenite to martensite (TRIP effect), may be detrimental to cracking resistance, even though it increases tensile properties. This phenomenon is attributed to a brittle network effect generated by the presence of hard fresh martensite islands in the fracture process zone. The connectivity of the hard secondary phases and the proportion of soft phase (ferrite) also have a major role in fracture toughness. The DP steel with larger volume fraction of ferrite and homogeneously distributed martensite islands shows significantly higher crack propagation resistance. The contribution of necking to the ductile fracture process is evaluated by means of thickness measurements in fractured DENT specimens and the correlation between the specific essential work of fracture (we) and tensile properties is investigated. It is concluded that the global formability and cracking resistance of high strength DP steels can be balanced through microstructural tailoring.
dc.format.extent1 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::Metal·lúrgia
dc.subject.lcshStrength of materials
dc.subject.lcshSteel
dc.subject.otherDual phase steels
dc.subject.otherMicrostructure
dc.subject.otherFracture toughness
dc.subject.otherEssential work of fracture
dc.subject.otherTRIP effect
dc.titleMicrostructural effects on fracture toughness of ultra-high strength dual phase sheet steels
dc.typeArticle
dc.subject.lemacResistència de materials
dc.subject.lemacAcer
dc.contributor.groupUniversitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
dc.identifier.doi10.1016/j.msea.2020.140631
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0921509320316944
dc.rights.accessOpen Access
local.identifier.drac29885106
dc.description.versionPostprint (published version)
local.citation.authorFrómeta, D.; Cuadrado, N.; Rehrl, J.; Suppan, C.; Dieudonné, T.; Dietsch, P.; Calvo, J.; Casellas, D.
local.citation.publicationNameMaterials science and engineering A. Structural materials properties microstructure and processing
local.citation.number802
local.citation.startingPage140631
local.citation.endingPage140631


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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain