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Coatings 2017, 7(11), 187;

Tribological and Wear Performance of Carbide Tools with TiB2 PVD Coating under Varying Machining Conditions of TiAl6V4 Aerospace Alloy

McMaster Manufacturing Research Institute (MMRI), Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada
Department of Mechanical and Materials Science, Catholic University of Santa Catarina, Rua Visconde de Taunay, 427-Centro, Joinville-SC 89203-005, Brazil
Department of Design and Production, Technical Research Center, Cairo 11461, Egypt
Department of Mechanical Engineering, Ufa State Aviation Technical University (USATU), Ufa 450008, The Republic of Bashkortostan, Russian Federation
Biointerfaces Institute, McMaster University, ETB 422, 1280 Main Street West, Hamilton, ON L8S0A3, Canada
1000 Marie-Victorin Blvd., Longueuil, QC J4G1A1, Canada
Instituto Federal de Educação, Ciência e Tecnologia Sul Riograndense (IFSul)—Campus Sapucaia do Sul, Piratini CEP 93216-120, Brazil
Author to whom correspondence should be addressed.
Academic Editors: James E. Krzanowski and Alessandro Lavacchi
Received: 5 September 2017 / Revised: 22 October 2017 / Accepted: 1 November 2017 / Published: 4 November 2017
(This article belongs to the Special Issue Coatings for Cutting Tools)
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Tribological phenomena and tool wear mechanisms during machining of hard-to-cut TiAl6V4 aerospace alloy have been investigated in detail. Since cutting tool wear is directly affected by tribological phenomena occurring between the surfaces of the workpiece and the cutting tool, the performance of the cutting tool is strongly associated with the conditions of the machining process. The present work shows the effect of different machining conditions on the tribological and wear performance of TiB2-coated cutting tools compared to uncoated carbide tools. FEM modeling of the temperature profile on the friction surface was performed for wet machining conditions under varying cutting parameters. Comprehensive characterization of the TiB2 coated vs. uncoated cutting tool wear performance was made using optical 3D imaging, SEM/EDX and XPS methods respectively. The results obtained were linked to the FEM modeling. The studies carried out show that during machining of the TiAl6V4 alloy, the efficiency of the TiB2 coating application for carbide cutting tools strongly depends on cutting conditions. The TiB2 coating is very efficient under roughing at low speeds (with strong buildup edge formation). In contrast, it shows similar wear performance to the uncoated tool under finishing operations at higher cutting speeds when cratering wear predominates. View Full-Text
Keywords: cutting tool wear; machining of TiAl6V4; TiB2 coated tool; machining conditions; FEM cutting tool wear; machining of TiAl6V4; TiB2 coated tool; machining conditions; FEM

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Paiva, J.M.; Shalaby, M.A.M.; Chowdhury, M.; Shuster, L.; Chertovskikh, S.; Covelli, D.; Junior, E.L.; Stolf, P.; Elfizy, A.; Bork, C.A.S.; Fox-Rabinovich, G.; Veldhuis, S.C. Tribological and Wear Performance of Carbide Tools with TiB2 PVD Coating under Varying Machining Conditions of TiAl6V4 Aerospace Alloy. Coatings 2017, 7, 187.

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