Journal of Applied Science and Engineering

Published by Tamkang University Press

1.30

Impact Factor

1.60

CiteScore

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.


REFERENCES


 

  1. [1]Morrell, R. (2006). Fracture toughness testing for advanced technical ceramics: Internationally agreed good practice. Adv Appl Ceram, 105, 88-98.
  2. [2]Novikov, N.V. & Dub, S.N. (1996). Hardness and fracture toughness of CVD diamond film. Diamond and related materials, 5, 1026-1030.
  3. [3]Reid, J., Luyckx, S & Fish, M.A. (1999). Modified indenter technique for generating cone cracks in diamond and new results obtained from the technique. Diamond and related materials, 8, 1544-1548.
  4. [4]Sumiya, H. & Irifune, T. (2004). Indentation hardness of nano-polycrystalline diamond prepared from graphite by direct conversion. Diamond and related materials, 13, 1771-1776.
  5. [5]Fischer, H. & Marx, R. (2002). Fracture toughness of dental ceramics: comparison of bending and indentation method. Dental Mater, 18, 12-19.
  6. [6]Achilles, R.D. & Brondsted, P. (2008). Development of a procedure for fatigue crack growth in PCD. Technical report, Element Six Pty Ltd - internal paper.
  7. [7]Awaji, H. & Sato, S. (1979). Diametral compressive testing method. J Eng Mater Technol, 101, 139-147.
  8. [8]Proveti, J.R.C. & Michot, G. (2006). The Brazilian test: a tool for measuring the toughness of a material and its brittle to ductile transition. Int J Fract, 139, 455-460.
  9. [9]Chen, P., Xie, H., Huang, F., Huang, T. & Ding, Y. (2006). Deformation and failure of polymer bonded explosives under diametric compression test. Polymer Testing, 25, 333-341.
  10. [10]Fairhurst, C. (1964). On the validity of the Brazilian test for brittle materials. Int J Rock Mech Min Sci, 1, 535-546.
  11. [11]Petrovic, M., Carolan. D., Ivankovic, A. & Murphy, N. (2011). Role of rate and temperature on fracture and mechanical properties of PCD. Key Eng Mater, 452-453, 153-156.
  12. [12]Mesic, E., Muminovic, A., Repcic, N. & Colic, M. (2011). Stress analysis of the sarafix external fixator design. Journal of Mechanics Engineering and Automation, 1, 473-480.
  13. [13]Pervan, N., Mesic, E., Colic, M. & Avdic, V. (2016). Stiffness analysis of the sarafix external fixator of composite materials. International Journal of Engineering &Technology, 5(1), 20-24.
  14. [14]Irwin, G.R. (1956). Onset of fast crack propagation in high strength steel and aluminium alloys. In Sagamore Research Conference Proceedings, 2, 289-305.
  15. [15]Kubler, J.J. (2002). Fracture toughness of ceramics using the SEVNB method: From a preliminary study to a test method. Fracture resistance testing of monolithic and composite brittle materials. ASTM 2002, STP 1409.
  16. [16]Petrovic, M., Ivankovic, A. & Murphy, N. (2011). The mechanical properties of polycrystalline diamond as a function of strain rate and temperature. J Eur Cer Soc, 32, 3021-3027.
  17. [17]Petrovic, M. & Kljuno, E. (2017). Thermal decohesion model validity for polycrystalline advanced ceramics, International Journal of Advanced and Applied Sciences, 4(7), 1-4.