Properties and Performance of TiAlSiN and AlCrN Monolayer and Multilayer Coatings for Turning Ti-6Al-4V

The high chemical activity, low thermal conductivity, and strength of titanium alloys lead to severe tool wear during cutting. coating applied the surface insulates effect heat reactions. TiAlSiN AlCrN are two representative coatings with excellent properties in TiN-based CrN-based applications, respectively. Three types nanocoatings—TiAlSiN monolayer, TiAlSiN/AlCrN multilayer—were prepared, microstructure, mechanical properties, oxidation resistance, diffusion alloy, cutting performance were investigated utilizing SEM, TEM, XRD, TGA, GD-OES, nanoindentation, scratching instruments. hardness, elastic modulus, adhesion multilayer between monolayer coatings, which meet “law mixtures”. Adhesion is primary condition for applications should have a minimum threshold value. Ti N elements most significant alloys. nitride containing Cr aggravates loss contact alloy. In addition, structural can more than due their inherent interlayer defects. Although coated tools other workpiece materials, main factor affecting life still H3/E*2 value determined by hardness modulus elasticity together.