Marin Petrovic This email address is being protected from spambots. You need JavaScript enabled to view it.1 and Elmedin Mesic1

1University of Sarajevo, Mechanical Engineering Faculty, Vilsonovo setaliste 9, 71000 Sarajevo, Bosnia and Herzegovina


Received: October 20, 2019
Accepted: January 16, 2020
Publication Date: June 1, 2020

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Polycrystalline advanced ceramics are composite materials produced by the reaction of tungsten metal powder and carbon powder in a metal binder at temperatures of 1,400-1,500°C. This process enables them a high hardness and abrasion resistance in all directions. The mode I fracture behaviour of single-edge-V-notched-beam specimens was investigated as a function of loading rate and temperature. A series of tests was conducted and plane strain fracture toughness values were determined at a range of loading rates and temperatures, as those in real operating conditions. These experimental results reveal a fracture mechanism establishing a clear connection between the fracture toughness results and the mechanisms causing fracture to happen.

Keywords: Brittle fracture, Fracture mechanics, Impact fracture, Toughness testing, Polycrystalline advanced ceramics.



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