Hall-Petch strengthening of the constrained metallic binder in WC–Co cemented carbides: Experimental assessment by means of massive nanoindentation and statistical analysis
WC–Co cemented carbides are geometrically complex composites constituted for two interpenetrating networks of the constitutive ceramic and metal phases. Accordingly, assessment of microstructural effects on the local mechanical properties of each phase is a challenging task, especially for the metal...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2016-10, Vol.676, p.487-491 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Roa, J.J. Jiménez-Piqué, E. Tarragó, J.M. Sandoval, D.A. Mateo, A. Fair, J. Llanes, L. |
| description | WC–Co cemented carbides are geometrically complex composites constituted for two interpenetrating networks of the constitutive ceramic and metal phases. Accordingly, assessment of microstructural effects on the local mechanical properties of each phase is a challenging task, especially for the metallic binder. In this work, it is attempted by combining massive nanoindentation, statistical analysis, and implementation of a thin film model for deconvolution of the intrinsic hardness and flow stress of the metallic phase. Plotting of yield stress values as a function of the binder mean free path results in a Hall-Petch strengthening relationship with a slope (ky) of 0.98MPam1/2. This value points out the effectiveness of WC–Co phase boundaries as strong obstacles to slip propagation; and thus, for toughening of the brittle phase (WC) by means of crack-bridging ductile (Co) reinforcement. |
| doi_str_mv | 10.1016/j.msea.2016.09.020 |
| format | Article |
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A, Structural materials : properties, microstructure and processing</title><description>WC–Co cemented carbides are geometrically complex composites constituted for two interpenetrating networks of the constitutive ceramic and metal phases. Accordingly, assessment of microstructural effects on the local mechanical properties of each phase is a challenging task, especially for the metallic binder. In this work, it is attempted by combining massive nanoindentation, statistical analysis, and implementation of a thin film model for deconvolution of the intrinsic hardness and flow stress of the metallic phase. Plotting of yield stress values as a function of the binder mean free path results in a Hall-Petch strengthening relationship with a slope (ky) of 0.98MPam1/2. 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A, Structural materials : properties, microstructure and processing</jtitle><date>2016-10-31</date><risdate>2016</risdate><volume>676</volume><spage>487</spage><epage>491</epage><pages>487-491</pages><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>WC–Co cemented carbides are geometrically complex composites constituted for two interpenetrating networks of the constitutive ceramic and metal phases. Accordingly, assessment of microstructural effects on the local mechanical properties of each phase is a challenging task, especially for the metallic binder. In this work, it is attempted by combining massive nanoindentation, statistical analysis, and implementation of a thin film model for deconvolution of the intrinsic hardness and flow stress of the metallic phase. Plotting of yield stress values as a function of the binder mean free path results in a Hall-Petch strengthening relationship with a slope (ky) of 0.98MPam1/2. This value points out the effectiveness of WC–Co phase boundaries as strong obstacles to slip propagation; and thus, for toughening of the brittle phase (WC) by means of crack-bridging ductile (Co) reinforcement.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2016.09.020</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2016-10, Vol.676, p.487-491 |
| issn | 0921-5093 1873-4936 |
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| source | Recercat; Elsevier ScienceDirect Journals |
| subjects | Binders Carbides Carburs Cemented carbides Cobalt Composites Enginyeria dels materials Hall-Petch relationship Microstructure Nanoindentation Nanotechnology Nanotecnologia Phase boundary strengthening Phases Propietats mecàniques Statistical analysis Tungsten carbide Àrees temàtiques de la UPC |
| title | Hall-Petch strengthening of the constrained metallic binder in WC–Co cemented carbides: Experimental assessment by means of massive nanoindentation and statistical analysis |
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