2008
DOI: 10.1016/j.msea.2007.12.036
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Analytical modeling to calculate the hardness of ultra-fine WC–Co cemented carbides

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Cited by 23 publications
(5 citation statements)
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“…The hardness of WC–Co is mainly affected by the average grain size of WC and Co content, 28 which is negatively correlated with the grain size of WC for a particular Co content 29 . Meanwhile, hardness decreases as the mean free path of Co increases 30 .…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The hardness of WC–Co is mainly affected by the average grain size of WC and Co content, 28 which is negatively correlated with the grain size of WC for a particular Co content 29 . Meanwhile, hardness decreases as the mean free path of Co increases 30 .…”
Section: Resultsmentioning
confidence: 99%
“…The hardness of WC-Co is mainly affected by the average grain size of WC and Co content, 28 which is negatively correlated with the grain size of WC for a particular Co content. 29 Meanwhile, hardness decreases as the mean free path of Co increases. 30 From Figure 7a, for a given Co content, the hardness of cemented carbides decreases with increasing carbothermal prereduction temperature.…”
Section: Hardness and Fracture Toughnessmentioning
confidence: 99%
“…one that accounts not only for the solid solution strengthening by dissolved tungsten and carbon but also for the limitation of slip length by the adjacent carbide crystals) is fundamental for formulating useful and reliable hardness and toughness models. Regarding hardness modelling attempts, in previous studies it has been estimated by considering the hardness of bulk cobalt (or Co W C dilute alloys) as baseline and assuming it obeys a conventional Hall-Petch relationship [1,2,[7][8][9][10][11]. This is also the case for toughness modelling, where the flow stress (σ flow ) for the constrained metallic binder (a critical parameter for reliable evaluation of the energy expended in the flow and fracture of the reinforcing ductile ligaments [37][38][39]) has been calculated through simple conversion of previously estimated intrinsic hardness data.…”
Section: Phasementioning
confidence: 99%
“…Refs. [1,2,[7][8][9][10][11]). In this regard, many of these studies have provided a relatively satisfactory agreement between experimental and estimated data by recalling diverse assumptions at the corresponding small length scale, such as in situ hardness for both phases obeying Hall-Petch relations independently from each other or constraint factors for individual phases and composite being the same.…”
Section: Introductionmentioning
confidence: 99%
“…Although the average grain size of WC–20HEA is larger than that of WC–10HEA, the hardness and compression strength of WC–20HEA is higher than that of WC–10HEA. It may be explained by the new relationship, while the WC grain sizes below 1 μm [23]: where is Poission's ratio of the HEA binder phase, d is the grain size of WC. In this relationship, the hardness of WC-based cemented carbides is not consistent with the Hall–Petch relationship when the grain size is very fine.…”
Section: Discussionmentioning
confidence: 99%