AYED Yessine
Maître de conférences HDR
Maître de Conférences HDR
DIPPE - Durabilité, Ingénierie des Procédés et Physique des Ecoulements
Activités d’enseignement
Mes interventions concernent principalement les procédés de fabrication. Elles portent particulièrement sur: (i) la mise en forme par enlèvement de matière et par déformation plastique et (ii) la simulation numérique des procédés
Activités de recherche
Mes activités de recherche se situent à la croisée de différentes disciplines scientifiques. Les sujets abordés ont trait à l'usinabilité des matériaux et à leur mise en forme par ajout de matière et par déformation plastique. Bien que les verrous scientifiques et techniques traités soient souvent en lien avec des problématiques industrielles, ils visent avant tout à améliorer la compréhension et l'explication des phénomènes physiques accompagnant la mise en forme des matériaux. Les nombreux objectifs poursuivis impliquent la mise en place d'une approche multi-échelle et duale (expérimentale/numérique) où le comportement mécanique des matériaux représente la clé de voute des modèles mis en place. Dès lors, la démarche suivie pour lever les divers verrous scientifiques se décline en trois grandes étapes : (i) caractérisation et modélisation du comportement mécanique des matériaux en conditions extrêmes, (ii) étude de la coupe à l’échelle mésoscopique/microscopique et (iii) étude des procédés de fabrication à l’échelle macroscopique.
Revealing Surface Integrity and Machinability Evolution Mechanism of Lead-Free Copper Under Cryogenic Cutting<p>Cryogenic cutting has been considered as an optional beneficial method to enhance machined surface integrity and machinability when cutting titanium alloys and nickelbased superalloys. Its…
Journal of Manufacturing Science and Engineering. 2026;148(7)
DOI : 10.1115/1.4071707
In this study, the impact of the microstructure of the Ti17 titanium alloy on cutting force and chip morphology is investigated using both experimental and numerical approaches. To this end, instrumented orthogonal cutting tests were conducted using a high-speed camera. According to in situ observat…
International Journal of Advanced Manufacturing Technology. 2026..
DOI : 10.1007/s00170-026-18425-7
Le formage incrémental est une solution flexible et économique pour la production de pièces complexes en petite série. La prédiction fidèle des forces de formage constitue un enjeu central pour l’optimisation du procédé et la maîtrise du comportement matériau. Ce travail propose une méthodologie de …
2025..
Bulk metallic glasses (BMGs), unlike crystalline alloys, exhibit significantly enhanced plastic deformation when tested at cryogenic temperatures. This enhanced plasticity is primarily characterized by the slowed propagation of shear bands and the formation of multiple shear bands, which play a cruc…
2025;54:1685-1693.
DOI : 10.21741/9781644903599-181
2025;54:1817-1825.
DOI : 10.21741/9781644903599-195
Friction phenomena at the chip/tool/workpiece interfaces during machining of material impacts significantly the cutting process. In this article, the effect of friction conditions (dry, emulsion, cryogenic) on the tribological performance of uncoated tungsten carbide tools is investigated when machi…
Tribology International. 2024;195:109588.
DOI : 10.1016/j.triboint.2024.109588
Titanium alloys, largely used for aeronautical applications, are difficult to machine. High cutting forces, chip serration and important tool wear reflect this poor machinability, limiting productivity. One way of improving the machinability of titanium alloys consists of controlling their microstru…
Journal of Materials Processing Technology. 2023;319:118054.
DOI : 10.1016/j.jmatprotec.2023.118054
This article discusses the effect of machining assistance on the machinability and surface integrity of titanium and nickel-based alloys for turning operations. The presented results are based on a literature review of the principal experimental work published by the French research laboratories wit…
International Journal of Advanced Manufacturing Technology. 2023;131(2):647-661.
DOI : 10.1007/s00170-023-11440-y
This paper presents a novel 3D numerical model of drilling CFRP to evaluate the degradation of mechanical properties in the hole surfaces. It can be used to determine the change of functional performance induced by accumulated damage. This function is realized through introducing damage evolution la…
2023;72(1):65-68.
DOI : 10.1016/j.cirp.2023.04.044
Titanium alloys are widely used in aerospace industries due to their excellent physical and mechanical performances, however, their poor machinability always induce fast tool wear. To better understand the interaction between progressive tool wear and cooling strategies in machining of titanium allo…
Tribology International. 2022;171:107537.
DOI : 10.1016/j.triboint.2022.107537
A crystal plasticity-based constitutive model is proposed to describe the thermo-mechanical behavior of the Ti17 titanium alloy subjected to extreme loading conditions. The model explicitly incorporates the effect of the crystallographic orientation of the hcp and bcc phases. The constitutive equati…
Mechanics of Materials. 2022;166:104198.
DOI : 10.1016/j.mechmat.2021.104198
Hole shrinkage is a common phenomenon in drilling difficult-to-cut materials like Ti6Al4V due to their poor thermal properties and high elasticity, which can lead to increase in tool wear and decrease in surface integrity. In this study, an in-depth analysis of hole shrinkage mechanism is carried ou…
International Journal of Advanced Manufacturing Technology. 2021;118(11-12):3849-3868.
DOI : 10.1007/s00170-021-08229-2
The machining of nickel-based superalloys is often challenging due to their excellent physical properties. High-temperature gradients are generated at the cutting zone, which accelerates the tool wear and impairs its performance. However, introducing high-pressure coolant (HPC) lubrication has been …
International Journal of Advanced Manufacturing Technology. 2021;114(7-8):2371-2386.
DOI : 10.1007/s00170-021-07002-9
The finite element modeling is significantly dependent on the accurate prediction of the material behavior. In order to increase the accuracy of numerical simulations, a new phenomenological model is proposed in this study. Its mathematical formulation allows suitable predictions of the Ti6Al4V sens…
International Journal of Advanced Manufacturing Technology. 2021;116(11-12):3933-3951.
DOI : 10.1007/s00170-021-07753-5
The present work focuses on the simulation of the heat treatment applied after printing of Ti-6Al-4V parts. The numerical tool aims at predicting the influence of heat treatment conditions (e.g. holding time, temperature) on the residual stress field and the distortions for SLM produced parts. The n…
Additive Manufacturing. 2020;39:101766.
DOI : 10.1016/j.addma.2020.101766
The most important challenges when machining difficult-to-cut alloys used in critical applications consist mainly in increasing tool life as well as improving the component surface integrity. In particular, the nickel based alloys exhibit very low thermal conductivity inducing higher cutting tempera…
Journal of Materials Processing Technology. 2020;285:116780.
DOI : 10.1016/j.jmatprotec.2020.116780
This paper focuses on the impact of cryogenic assistance on the drilling of Ti6Al4V titanium alloy. It develops a relation between the phenomenon of hole shrinkage and measurements performed either during or after the machining operation. Indeed, because this phenomenon is apparently strongly associ…
International Journal of Advanced Manufacturing Technology. 2020;108(9-10):2675-2686.
DOI : 10.1007/s00170-020-05381-z
Surface integrity induced by machining process affects strongly the performance of functional products, for instance, the fatigue life as well as the resistance to stress corrosion cracking. Consequently, it is relevant to evaluate the induced properties on and beneath the machined surfaceto ensure …
2020;47:530-534.
DOI : 10.1016/j.promfg.2020.04.150
Because of its excellent properties, such as good corrosion resistance, high specific strength and important ductility, the AA5383 aluminum alloy is largely employed for naval applications. In this work, the mechanical behavior of the AA5383 alloy at elevated temperatures, which is an important aspe…
Journal of Materials Processing Technology. 2020;281:116609.
DOI : 10.1016/j.jmatprotec.2020.116609
The numerical analysis, based on the finite element modeling (FEM), presents nowadays an efficient computational tool. It allows a better understanding of several thermo-mechanical phenomena involved during the machining process. However, its reliability heavily depends on the accurate definition of…
Machining Science and Technology. 2020;24(4):509-543.
DOI : 10.1080/10910344.2019.1698606
A 3D finite element modeling of the orthogonal turning process was curried out in the current study. It aims to carefully investigate the mechanisms controlling the chip segmentation and the crack propagation direction in the case of the Ti6Al4V machining. Coupled temperature-displacement numerical …
2020;671-680.
DOI : 10.1007/978-3-030-27146-6_73
Nickel-based superalloys are widely exploited in turbojets components which are subjected to intense thermal and mechanical loadings during their operation. In fact, they exhibit excellent mechanical properties over a wide range of temperature and high corrosion and creep resistance. However, these …
2019;2113
DOI : 10.1063/1.5112610
Procedia CIRP. 2019;82:20-25.
DOI : 10.1016/j.procir.2019.04.336
In this work, the impact of the microstructure and the loading conditions on the mechanical behavior of a β-rich Ti17 titanium alloy is investigated. For this purpose, two different initial microstructures are considered : (i) a two-phase lamellar α + β microstructure and (ii) a single-phase equiaxe…
Journal of Materials Science. 2019;:1765-1778.
DOI : 10.1007/s10853-019-04014-5
AIP Conference Proceedings. 2018;070004.
DOI : 10.1063/1.5034900
For metallic materials, fabrication processes (e.g. machining and forging) may involve important strain rates and high temperatures. For such severe loading conditions, the development of damage is often associated with the formation of Adiabatic Shear Bands (ASB). In this work, the impact of loadin…
2018;1960(070004):0-0.
DOI : 10.1063/1.5034900
Multi-Point Incremental Forming (MPIF) process is a new hybrid process that combines two common manufacturing methods. These are Multipoint Forming (MPF) and Incremental Sheet Forming (ISF) processes. In this study, an experimental set-up, based on a MP reconfigurable die, was designed and manufactu…
International Journal of Material Forming. 2017;11(6):815-827.
DOI : 10.1007/s12289-017-1392-1
Cryogenic-assisted machining has already shown its advantages on the process and the machining parameters have been analysed. However, part of the coolant jet characteristics as the pressure and flow rate have not been completely studied and optimized. Hence, the main objective of this study is to i…
International Journal of Advanced Manufacturing Technology. 2017;93(1-4):1199-1206.
DOI : 10.1007/s00170-017-0604-7
The development of computation means has allowed the simulation of complex mechanical problems. The first simulations of manufacturing processes at the microstructure scale, namely in the field of machining, have recently emerged. In this study, and on the basis of previous research, a novel approac…
Finite Elements in Analysis and Design. 2017;137:43-55.
DOI : 10.1016/j.finel.2017.08.002
This work deals with the phenomenon of hole shrinkage during Ti6Al4V drilling. Indeed, the shape and dimensions of the drilled hole, as well as the heat generated by the operation depend on this phenomenon which is caused by multiple factors, including the relaxation of internal residual stresses, t…
2017;58:629-634.
DOI : 10.1016/j.procir.2017.03.226
In this paper, a deep study of constitutive parameters definition effect is done in order to guarantee sufficient reliability of the finite element machining modeling. The case of a particular biphasic titanium alloy Ti6Al4V known by its low machinability is investigated. The Johnson-Cook (JC) elast…
International Journal of Advanced Manufacturing Technology. 2016;1-21.
DOI : 10.1007/s00170-016-8934-4
The aim of this study is to develop a new numerical cutting model that includes fluid structure interaction and to take into account heat transfer between the water-jet, the workpiece and the chip. This has been achieved using a CEL (Coupled–Eulerian–Lagrangian) technique, an algorithm has been deve…
Finite Elements in Analysis and Design. 2016;108:1-8.
DOI : 10.1016/j.finel.2015.09.003
Understanding the physics of chip formation in machining operations is often difficult due to the complexity of the phenomena involved, such as the extreme and complex loading conditions that occur in the cutting zone. In order to model the machining process, it is necessary to use a constitutive be…
International Journal of Advanced Manufacturing Technology. 2016;1-11.
DOI : 10.1007/s00170-016-9476-5
This study focuses on the optimization of the machining assisted by cryogenic cooling. The main objective is to analyze the effect of the pressure and the flow of liquid nitrogen on tool life when machining titanium alloy Ti-6Al-4V using the cryogenic assisted machining. A nozzle holder has been spe…
HSM - High Speed Machining. 2016;2016:1-3.
This paper presents experimental results concerning the machinability of the titanium alloy Ti17 with and without high-pressure water jet assistance (HPWJA) using uncoated WC/Co tools. For this purpose, the influence of the cutting speed and the water jet pressure on the evolution of tool wear and c…
Precision Engineering. 2015;42:294-301.
DOI : 10.1016/j.precisioneng.2015.06.004
Laser-assisted machining combines several experimental parameters such as cutting speed, feed rate, depth of cut, laser power and distance between tool rake face and the laser beam axis. The optimization of these parameters is necessary to ensure the efficiency of assistance and to increase producti…
Finite Elements in Analysis and Design. 2014;92:72-79.
DOI : 10.1016/j.finel.2014.08.006
Cette étude porte sur l'usinage de l'alliage de titane Ti17 avec une assistance jet d'eau haute pression. Une attention particulière a été portée à l'analyse des mécanismes de dégradation et d'usure des outils lors de l'usinage avec et sans assistance. Le suivi de l'usure est réalisé par des observa…
2013..
DOI : 10.70675/ebdc61bfz91bbz46dfza64fz0138f4aa01c4
Determining a material constitutive law which is representative of the extreme conditions found in the cutting zone during machining operations is a very challenging problem. In this study, dynamic shear tests, which reproduce, as faithfully as possible, these conditions in terms of strain, strain r…
2013;1-6.
This article presents the results of an experimental study on the Ti17 titanium alloy, which was carried out to analyze tool wear and the degradation mechanisms of an uncoated tungsten carbide tool insert. Two machining conditions, roughing and finishing, have been studied under different lubricatio…
Wear. 2013;305(1-2):228-237.
DOI : 10.1016/j.wear.2013.06.018
Titanium alloys are known for their excellent mechanical properties, especially at high temperature. But this specificity of titanium alloys can cause high cutting forces as well as a significant release of heat that may entail a rapid wear of the cutting tool. To cope with these problems, research …
Key Engineering Materials. 2013;554-557:1961-1966.
DOI : 10.4028/www.scientific.net/KEM.554-557.1961