Title: Analysis of coating performances in machining titanium alloys for aerospace applications

Authors: M. Nouari; Madalina Calamaz; B. Haddag; Franck Girot

Addresses: Laboratoire d'Energétique et de Mécanique Théorique et Appliquée (LEMTA-CNRS UMR 7563), Ecole des Mines de Nancy, GIP-InSIC 27 rue d'Hellieule 88100, Saint-Dié-Des-Vosges, France ' Arts et Métiers Paris Tech, I2M, Université Bordeaux 1, Esplanade des Arts et Métiers, 33405 Talence Cedex, France ' Laboratoire d'Energétique et de Mécanique Théorique et Appliquée (LEMTA-CNRS UMR 7563), Ecole des Mines de Nancy, GIP-InSIC 27 rue d'Hellieule 88100, Saint-Dié-Des-Vosges, France ' Ikerbasque, Basque Foundation for Science, Bilbao, Spain; I2M, Arts et Métiers ParisTech, Université de Bordeaux. Esplanade des Arts et Métiers, 33405 Talence Cedex, France

Abstract: The current study emphasises the role of coating materials in enhancing the wear resistance of the cutting tool and improving the tool-chip contact. The wear mechanisms have been investigated through a series of cutting experiments performed on an instrumented planer machine. Machining tests were conducted on the usual Ti-6Al-4V alloy (workpiece) and cemented carbide tools. Four new coatings were especially designed for the study: 1) diamond (thin layer, about 2 to 3 µm); 2) diamond+TiB2+CrN/DLC (diamond like carbon, about 3, 5 µm); 3) diamond (thick layer, 6 µm); 4) TiB2+CrN/DLC (3 µm). The performance of each coating material was analysed and compared in one hand to the uncoated carbide tools and on the other hand to the CBN reinforced carbide tools in terms of cutting forces and tool wear mechanisms.

Keywords: titanium alloys; coatings; CBN reinforced tools; DLC; diamond like carbon; tool-chip contact; wear mechanisms; coating performance; aerospace applications; coating materials; wear resistance; cemented carbide tools; cutting forces; tool wear.

DOI: 10.1504/IJMMM.2013.053220

International Journal of Machining and Machinability of Materials, 2013 Vol.13 No.2/3, pp.158 - 173

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 12 Apr 2013 *

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