Título:
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Mapping of mechanical properties at microstructural length scale in WC-Co cemented carbides: Assessment of hardness and elastic modulus by means of high speed massive nanoindentation and statistical analysis
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Autor/a:
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Roa Rovira, Joan Josep; Phani, P. Sudharshan; Oliver, Warren C.; 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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This paper studies the correlation between the microstructure and the mechanical properties at the nanometric length
scale of individual WC grains as well as the metallic cobalt binder in cemented carbide systems. The local
crystallographic orientation has been determined by electron backscattered diffraction and the microstructural analysis
has been performed using field emission scanning electron microscopy. Small-scale hardness and elastic modulus
have been assessed by means of high speed massive nanoindentation and subsequent statistical analysis. The
attained mechanical property mappings present a clear correlation between local hardness and stiffness with chemical
nature for each constitutive phase as well as with the crystallographic orientation for the WC particles. Besides
expected findings associated with individual phases, such as clear anisotropy of the ceramic phase (basal plane being
harder and stiffer than the prismatic one) and relatively high flow stress for constrained binder, the protocol
implemented provides novel information on local mechanical response at interfaces between ceramic particles with
different orientations as well as regions within the metallic cobalt binder close to the WC-Co interface. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Carbides -Hardness -cemented carbides -nanoindentation -massive indentation -statistical method -mechanical mapping -mechanical anisotropy -hardness -elastic modulus -Carburs -- Propietats mecàniques -Duresa |
Derechos:
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Tipo de documento:
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Artículo - Borrador Artículo |
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