Abstract
KIc-values of tungsten carbide-cobalt (WC-Co) hard metals were measured using the short-rod (chevron-notched) specimen geometry. Nine alloys of various cobalt contents and tungsten carbide particle sizes were tested using modified self-aligning tensile grips. A compliance method was adopted for the test. For comparison, the same WC-Co alloys were tested using single-edge-notched beam (SENB) specimen geometry in four-point bending. A sharp notch was introduced into the SENB specimen using a thin copper foil blade in an electrical discharge machine (EDM). The same alloys were also tested using Barker's flatjack method with short-rod specimen geometry. Microstructural parameters, mean free path of cobalt, mean intercept length, and contiguity of WC, were measured using a semiautomatic image analyzing method for all the alloys. Optical, scanning electron, and transmission electron micrography were used for quantitative image analysis. From these microstructural parameters, KIc-values were calculated using a theoretical equation derived by Hong and Gurland. The four independent experimental KIc-values for nine alloys are discussed with respect to the accuracy and convenience of each experimental measuring technique.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
