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M. Bendifallah, M. Brioua, and A. Belloufi, “CUTTING TOOL LIFE AND ITS EFFECT ON SURFACE ROUGHNESS WHEN TURNING WITH WC-6% CO,” International Journal of Modern Manufacturing Technologies , vol. XII, no. 2, 2020. Publisher's VersionAbstract

During turning operations, tool-part-chip contact causes wear to the cutting tool. The objective of this work is to study the wear of the clearance faces of tungsten carbide cutting tools during turning operations. Experimental tests on tool life for dry turning operations were carried out at four different cutting speeds, where the feed rate and the depth of cut are kept at constant values: 0.08 mm/rev for feed rate and 0.5 mm for depth of cut. An analysis of the influence of cutting parameters on the tools wear and consequently tool life (Τ) was presented, then the roughness of the machined surface Ra and the morphology of the chips produced were studied. This study makes it possible to identify that the wear mechanisms and the tool life are strongly linked to the roughness of the machined surfaces and to the morphology of the chips produced during the turning operations.

A. Abboudi, B. Chermime, H. Djebaili, and M. Brioua, “Characterization of the Microstructural and Mechanical Properties of MoZrN Coating,” Journal of Nano- and Electronic Physics, vol. 9, no. 1, 2017. Publisher's VersionAbstract
The aim of this paper is evaluation of properties of samples with The ternary nitride (Mo,Zr)N thin films were grown on silicon and steel XC100 substrates by the reactive RF magnetron sputtering technique. The substrates were exposed to ion bombardmen coating, which was deposited on two types of substrates. Silicon was made by melt technology, this method belongs to PVD (Physical Vapour deposition) process. Thin PVD coatings deposited onto surface of tools and machine parts are widely used in a range of sectors, for example in machine engineering. These materials, wear resistance and thermal and chemical stability of the surface. Structure, chemical composition a properties of thin layers depend on technological parameters of the PVD process and preparation of steel substrate. High requirements on the quality of thin PVD coatings resulted in development of methods used to evaluate of their properties. The theckness is one of the important characteristics of mechanical properties of the coated parts. The surface morphology, microstructure, and composition were studied by atomic force microscopy (AFM) nanoindentation, scanning electron microscopy (SEM) and X-ray diffractometer.
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