Compressive yield stress of tungsten carbide

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Problem: A composite material used for rock-drilling bits consists of tungsten carbide cubes, each 20 micrometers in size, stuck together with a thin layer of cobalt. The material is required to withstand compressive stresses of 4,000 MN/m^2 in service. Use the equation k=sigma y/2 to estimate an upper limit for the thickness of the cobalt layer. Assume compressive yield stress of tungsten carbide is well above 4000 MN/m^2 and that cobalt yields in shear at k=175 MN/m^2.

Reference no: EM132416679

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