Abstract
The search for alternative test methods for carbide alloys was caused by the difficulties in determining the mechanical properties of these materials and absence of valid criteria of their working capacity prediction. The main goal of the paper was to study carbide alloys based on TiC and WC carbides via instrumented indentation technique. The proportionality limit, elastic stiffness, plasticity index and capability to dissipate indentation energy were determined for each examined alloy. It was shown that the level of material properties was increased by growth of the following characteristics: elastic stiffness; plasticity index; ratio of dissipated energy to elastically-recovered energy; ratio of elastic energy in a contact area of an indenter with its imprint to the total elastically-recovered energy; ratio of dissipated energy to the total indentation energy. It was proved that alloys based on the TiC with Ti-Ni or Ni-Fe matrixes had lower properties than WC-based alloys with Co-Ni matrix.
Keywords
Indentation, carbide alloy, instrumented indentation, dissipated energy, elastic-recovered energy.
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