Title: Numerical characterisation of the friction coefficient at the tool-chip-workpiece interface during friction tests of AISI 1045

Authors: Hamdi Ben Abdelali; Wacef Ben Salem; Joel Rech; Abdelwaheb Dogui; Philippe Kapsa

Addresses: Universté de Monastir, Ecole Nationale d'Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Avenue Ibn Al-Jazzar, Monastir 5019, Tunisie ' Universté de Monastir, Ecole Nationale d'Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Avenue Ibn Al-Jazzar, Monastir 5019, Tunisie ' Université de Lyon, Ecole Nationale d'Ingénieurs de Saint-Etienne, Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, 58 Rue Jean Parot, Saint-Etienne 42023, France ' Universté de Monastir, Ecole Nationale d'Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Avenue Ibn Al-Jazzar, Monastir 5019, Tunisie ' Université de Lyon, Ecole Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, 36 Avenue Guy de Collongue, Ecully 69134, France

Abstract: The characterisation of frictional phenomena at the tool-chip-workpiece interface in metal cutting remains a challenge. This paper aims at identifying a workpiece surface temperature and an equivalent plastic strain at this interface during the dry cutting of an AISI 1045 with TiN-coated carbide tools. A 3D arbitrary Lagrangian Eulerian (ALE) numerical model simulating the frictional test has been developed to extract local parameters around the spherical pin, such as the plastic strain and the workpiece surface temperature, from experimental macroscopic measurements. A large range of sliding velocities (5-300/min) has been investigated. It has been shown that plastic strain and workpiece surface temperature are mainly dependent on sliding velocity. Two friction regimes have been identified. These numerical results provide a better understanding of the tribological phenomena along the tool-chip-workpiece interfaces in dry machining of an AISI 1045 steel with a TiN-coated carbide tool.

Keywords: apparent friction; heat flux; plastic strain; workpiece surface temperature; friction coefficient; tool-chip-workpiece interface; friction tests; dry cutting; TiN coatings; titanium nitride; carbide tools; modelling; numerical simulation; spherical pin; sliding velocity; tribology; dry machining; AISI 1045 steel.

DOI: 10.1504/IJMMP.2014.066564

International Journal of Microstructure and Materials Properties, 2014 Vol.9 No.2, pp.147 - 159

Published online: 30 Apr 2015 *

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