A modified hardness model for WC-Co cemented carbides
2004 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, Vol. 386, no 1-2, 262-268 p.Article in journal (Refereed) Published
Nanoindentation tests have been made to measure the elastic modulus and hardness of WC particles. Using a general relationship between elastic modulus, hardness, and representative stress of indentation, a constraint factor, i.e. hardness/yield stress, of 2.24 is determined for WC particles through nanoindentation test. With that as an input, finite-element simulations of indentations of WC-Co cemented carbides have been carried out and a constraint factor of 2.7 is obtained for WC-Co cemented carbides. Based on the so-determined constraint factors, a modification of Lee and Gurland hardness model is proposed. Comparisons of the modified hardness model and Lee and Gurland hardness model with the results of finite-element simulations and the experimental results from literature show that the modified model gives better estimation of the hardness of WC-Co cemented carbides.
Place, publisher, year, edition, pages
2004. Vol. 386, no 1-2, 262-268 p.
cemented carbide, hardness, constraint factor, nanoindentation, finite-element simulations
IdentifiersURN: urn:nbn:se:kth:diva-39792DOI: 10.1016/j.msea.2004.07.061ISI: 000225127800031ScopusID: 2-s2.0-5744227424OAI: oai:DiVA.org:kth-39792DiVA: diva2:440783
QC 201109132011-09-132011-09-122012-01-17Bibliographically approved