Título:
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Fracture and fatigue behavior of cement carbides:3D focused ion beam tomography of crack-microstructure interactions
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Autor/a:
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Tarragó Cifre, Jose María; Jiménez Piqué, Emilio; Turón Viñas, Miquel; Rivero, Lorenzo; Al-Dawery, Ihsan; Schneider, Ludwig; Llanes Pitarch, Luis Miguel
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
Abstract:
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The fracture and fatigue phenomena in WC-cobalt cemented carbides (hard-metals) have been subjects extensively investigated in the last 30 years. From these studies, it is well established that the metallic binder phase plays a key role as the toughening and fatigue-susceptible agent in these materials, as its effective ductility is critical for defining crack-growth resistance and cyclic-induced degradation. However, experimental proof of the role of toughening and fatigue micromechanisms has usually been presented on the basis of post-failure fractographic examination. In this work, the fracture and fatigue behavior of WC-cobalt is investigated and a 3D characterization of crack microstructure interaction during stable crack growth in hardmetals is carried out in order to gain a better understanding of the failure processes in cemented carbides under monotonic and cyclic loads. In doing so, focused ion beam/field emission scanning electron microscopy (FIB/FESE114), 3D tomography, and imaging reconstruction are combined with systematic mechanical and indentation protocols for assessing crack-extension behavior of cemented carbides. Experimental findings clearly highlight existing differences regarding failure mechanisms operative under monotonic and cyclic loads, and provide new and interesting insights for understanding them. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Carbides -WC-CO -HARD METALS -MECHANICAL-PROPERTIES -TOUGHNESS EVALUATION -GROWTH-BEHAVIOR -HARDMETALS -CERMETS -DUCTILE -DEFORMATION -PROPAGATION -Carburs -- Fractura -Metalls -- Fractura -Materials ceràmics |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Artículo |
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