Sakoman, Matija and Ćorić, Danko and Vuić, Dario (2016) Load dependece of hardness and fracture toughness values on hardmetals. = Load dependece of hardness and fracture toughness values on hardmetals. In: International Conference on Materials, Tribology, Recycling, MATRIB 2016, 23-25.06.2016., Vela Luka, Hrvatska.
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Abstract
Fracture toughness is one of the most important parametars for tool aplications and preformance assesment of WC-Co hardmetals. In this paper the effect of applied load on the hardness and fracture toughness of hardmetal is investigated. The tested sample contained 9 wt. % of Co and was manufactured by sinter-HIP process. Hardness measurements were carried out by Vickers method with four different loads: 29, 42 N (HV3) 49, 03 N (HV5) 196, 13 N (HV20) and 294, 20 N (HV30). Thirty measurements were conducted with each value of the applied load. At all measurements the sample surface showed cracks that spread from the vertices of the indentation. Dimensional characteristics of generated indentation and the resulting length of the cracks were measured by using an optical microscope, immediately after unloading. Fracture toughness was determined by Palmqvist method according to ISO 28079: 2009.
| Item Type: | Conference or Workshop Item (Poster) |
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| Keywords (Croatian): | hardmetal, fracture toughness, hardness, indentation load |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering |
| Divisions: | 1000 Department of Materials 1000 Department of Materials > 1010 Chair of Materials and Tribology |
| Indexed in Web of Science: | No |
| Indexed in Current Contents: | No |
| Date Deposited: | 21 Sep 2016 08:41 |
| Last Modified: | 09 Mar 2018 12:49 |
| URI: | http://repozitorij.fsb.hr/id/eprint/6624 |
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