Authors:
Marc Serra (1), Fernando García-Marro (1,2), Nuria Cinca (3), Luis Llanes (1,2)
1- CIEFMA – Department of Materials Science and Engineering, EEBE – Campus Diagonal Besòs, Universitat Politècnica de Catalunya – BarcelonaTech, 08019 Barcelona, Spain
2- Barcelona Research Center in Multiscale Science and Engineering, Campus Diagonal Besòs, Universitat Politècnica de Catalunya – BarcelonaTech, 08019 Barcelona, Spain
3- Hyperion Materials & Technologies, 08107 Barcelona, Spain
Abstract:
Hardmetals are composite materials comprising carbides embedded in a ductile metallic binder. This combination, with different relative amounts and sizes of ceramic particles, allows obtaining a wide variety of microstructural qualities with excellent mechanical and tribological properties. However, many of the applications in which these materials are used involve cyclic stresses, which often lead to premature failure of components and tools. Therefore, studying the fatigue strength of hardmetals is a topic of great practical interest. A commonly used method to estimate the fatigue strength of structural materials is the “staircase method”. Results obtained are usually analyzed by the Dixon and Mood approach. Trying to reduce time and resources, this work analyzes the use of a modified staircase method, to optimize the methodology to both evaluate the fatigue resistance by using a reduced number of samples and improve the acquisition of statistical information on the reliability of the fatigue life.
DOI:
https://doi.org/10.59499/EP235764267