Fracture behavior of polycrystalline advanced ceramics as a function of loading rate and temperature

Marin Petrovic; Elmedin  Mesic

doi:10.6180/jase.202006_23(2).0007

Fracture behavior of polycrystalline advanced ceramics as a function of loading rate and temperature

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

Download Citation: ||https://doi.org/10.6180/jase.202006_23(2).0007

ABSTRACT

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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