Fracture behaviour of WC-Co hardmetals with WC partially substituted by titanium carbide

M. Szutkowska, M. Boniecki, S. Cygan, A. Kalinka, M.L. Grilli, S. Balos

Research output: Contribution to conferencePaper

Abstract

The addition of various amounts of TiC0.9phase in the range from 5wt.% to 20wt.% substituting WC phase was applied in WC-Co hardmetals with 9.5 wt.% bonding cobalt phase. The hardmetals were consolidated using Hot Isostatic Pressing (HIP) method at temperature of 1573K and pressure of 1500 atm. The plain strain fracture toughness has been determined from 3PB test on a precracking single edge notched beam (SENB) specimen. The indentation fracture toughness with Vickers cracks for comparison was also measured, which changed from 12 to 9.0 MPa•m1/2. The amount of the TiC0.9phase affected the mechanical and physical properties: Vickers hardness from 12.5 to 14.0 GPa, Young's modulus from 550 to 460 GPa, density from 13.1 to 9.6 g/cm3, friction coefficient from 0.24 to 0.45, fracture toughness from 16.8 to 11.0 MPa•m1/2. Scanning electron microscopy (SEM), X-ray and electron diffraction phase analysis were used to examine the WC-Co hardmetal with addition of the TiC0.9phase. For comparison, physical and mechanical properties of the WC-Co hardmetals before modification were tested.
Original languageEnglish
DOIs
Publication statusPublished - 26 Mar 2018
EventSymposium on Solutions for Critical Raw Materials Under Extreme Conditions 2017 - Warsaw, Poland
Duration: 26 Mar 2018 → …

Conference

ConferenceSymposium on Solutions for Critical Raw Materials Under Extreme Conditions 2017
CountryPoland
CityWarsaw
Period26/3/18 → …

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Szutkowska, M., Boniecki, M., Cygan, S., Kalinka, A., Grilli, M. L., & Balos, S. (2018). Fracture behaviour of WC-Co hardmetals with WC partially substituted by titanium carbide. Paper presented at Symposium on Solutions for Critical Raw Materials Under Extreme Conditions 2017, Warsaw, Poland. https://doi.org/10.1088/1757-899X/329/1/012015