Abstract
The aim of this work was to investigate fracture and fatigue behaviour of TiC—Ni/Fe cermets under monotonic and cyclic loading. The fracture toughness KIc was determined by a conventional testing method (using single edge notched beam) and evaluated by an indentation technique (indentation fracture toughness (IFT)). Results from both experimental routines were analysed and compared with the reference hardmetal – WC-10 wt% Co. As the result, a novel sequence for estimation of the IFT for TiC- and WC-based cemented carbides is presented. The transverse rupture strengths RTZ and fatigue strengths σf at a given life (107 cycles) were obtained by the testing of unnotched and notched specimens with the three-point bending scheme. Considering that the fatigue lifetime of cemented carbides is given by the subcritical crack growth of pre-existing defects, a linear elastic fracture mechanics approach is attempted to assess fatigue life—fatigue crack growth relationships for the studied materials. The reliability of used fatigue mechanics approach is proved by the excellent agreement observed between estimated and experimentally determined values for fracture toughness and fatigue strength of the investigated materials.
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 callMore From: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Disclaimer: 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.
