Influence of Thickness of Multilayer Composite Nano-structured Coatings on Tool Life of Metal-Cutting ToolCatherine Sotova, Nikolay Sitnikov, Jury Bublikov, Gaik Oganyan and Andre D.L. BatakoEPJ Web Conf., 224 (2019) 05011DOI: https://doi.org/10.1051/epjconf/201922405011