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Grinding effects on surface integrity and mechanical strength of WC-Co cemented carbides

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10.1016/j.procir.2014.04.044
 
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Yang, Jing
Odén, Magnus
Johansson-Jõesaar, M.P.
Llanes Pitarch, Luis MiguelMés informacióMés informacióMés informació
Document typeArticle
Defense date2014
PublisherElsevier
Rights accessOpen Access
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
Abstract
In this study, the correlation existing among grinding, surface integrity, and flexural strength is investigated for WC-Co cemented carbides (hardmetals). A fine-grained WC-13 wt % Co grade and three different surface conditions: (1) ground, (2) mirror-like polished (reference), and (3) ground plus high-temperature annealed, are investigated. Surface integrity and mechanical characterization is complemented with fractography. The grinding strongly affects both surface integrity and flexural strength. During grinding, a damaged thin layer together with high compressive residual stresses is introduced. The layer results in considerable strength enhancement compared to the reference polished surface condition. Fractography reveals that the improved strength mainly stems from grinding-induced changes on effective location, from surface into subsurface levels, of the strength-controlling flaw.
CitationYang, J., Oden, M., Johansson-Jõesaar, M.P., Llanes, L. Grinding effects on surface integrity and mechanical strength of WC-Co cemented carbides. "Procedia CIRP", 2014, vol. 13, p. 257-263. 
URIhttp://hdl.handle.net/2117/101424
DOI10.1016/j.procir.2014.04.044
ISSN2212-8271
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S2212827114000456
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  • Departament de Ciència dels Materials i Enginyeria Metal·lúrgica - Articles de revista [961]
  • CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials - Articles de revista [283]
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