Abstract
Titanium aluminide Ti48Al2Cr2Nb was tribologically tested on a pin-on-disk tribometer from −50 to 600 °C, using coated and uncoated carbide cutting tools as a pin. The goals were to characterise the wear and friction behaviour and to find the most efficient tool for turning processes. A transition from ploughing to plastic deformation and adhesive wear was observed as temperature raises. The friction coefficient reached the minimum value at 600 °C, mainly due to the lubricating effect of the TiO2-tribolayer formed. However, excessive tool wear occurs at this temperature due to the oxidised debris. The PVD TiAlN+AlCr2O3 coated tool behaved best. Although working under cryogenic condition is not effective regarding friction, a decline in the tool wear was observed.
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