MAREAU Charles
Courriel
charles.mareau@ensam.eu
Maître de conférences
Maître de Conférences
DIPPE - Durabilité, Ingénierie des Procédés et Physique des Ecoulements
Formation
Doctorat en Mécanique et Matériaux, Ecole Nationale d'Arts et Métiers - LEM3 (Metz, 2007)
- Modélisation micromécanique de l’échauffement et de la microplasticité des aciers sous sollicitations cycliques
D.E.A. Mécanique Matériaux Structures et Procédés, Université de Metz - LEM3 (Metz, 2004)
- Modélisation de l’endommagement par décohésion aux interfaces matrice-particule
Diplôme d’Ingénieur, Ecole Nationale d’Ingénieurs de Metz (Metz, 2004)
- Spécialité Recherche et Développement
Expérience professionnelle
Maître de conférences, Ecole Nationale Supérieure d’Arts et Métiers - LAMPA (Angers, Depuis 2011)
Attaché Temporaire d'Enseignement et de Recherche (A.T.E.R.), Ecole Nationale Supérieure d’Arts et Métiers - LAMPA (Angers, 2010-2011)
Chercheur Postdoctoral, Queen’s University, (Kingston, Canada, 2008-2010)
<div><p>The development of constitutive models usually relies on the framework of strain-gradient plasticity to consider the size and gradient effects that affect the thermomechanical behavior of crystalline materials. In this work, an alternative strategy, which fits into the category of strain-int…
Journal of the Mechanics and Physics of Solids. 2025;203:106236.
DOI : 10.1016/j.jmps.2025.106236
This study investigates the effect of additive manufacturing process parameters on the surface characteristics and performances of titanium Ti6Al4V, used for orthopedic implants. Parts were manufactured by selective laser melting, using a variety of volumetric energy densities, ranging from 58 to 15…
International Journal of Advanced Manufacturing Technology. 2025;137(11-12):5487-5498.
DOI : 10.1007/s00170-025-15484-0
In the present work, the impact of cyclic loading conditions on the accumulation of stored energy in an austenitic steel is investigated. For this purpose, in situ X-ray diffraction analyses were carried out to estimate the stored energy density from integral breadths. Specifically, uniaxial cyclic …
Metallurgical and Materials Transactions A. 2024;55(6):1932-1941.
DOI : 10.1007/s11661-024-07369-w
X-ray diffraction techniques are widely used to estimate stresses within polycrystalline materials. The application of these techniques requires the knowledge of the X-ray elastic constants relating the lattice strains to the stress state. Different analytical methods have been proposed to evaluate …
Journal of Applied Crystallography. 2023;56(5):1446-1455.
DOI : 10.1107/s1600576723006878
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
In the present work, a framework for the development of constitutive models for metallic materials in a thermomechanical context is proposed. Such a framework provides some guidelines to deal with processes involving large temperature variations, which is typical of manufacturing operations or sever…
Mechanics of Materials. 2023;181:104637.
DOI : 10.1016/j.mechmat.2023.104637
The influence of a proof load, or an initial overload, on the fatigue resistance of welded structures is investigated in this study. Arc welded stiffeners made of S355 steel are considered and fatigue-tested in as-welded and proof-loaded conditions. X-ray diffraction analyses are carried out to eval…
International Journal of Fatigue. 2023;172:107604.
DOI : 10.1016/j.ijfatigue.2023.107604
The present work deals with the development of a framework dedicated to the construction of constitutive models with non-local internal variables. Such internal variables allow considering the impact of microstructural changes on the current state of a material point. Non-locality is introduced by c…
Continuum Mechanics and Thermodynamics. 2022;34(5):1173-1195.
DOI : 10.1007/s00161-022-01113-8
The a -> b phase transformation upon heating in the Ti-5553 alloy with lamellar-nodular bimodal microstructure was tracked in situ with high energy X-ray diffraction. Rapid heating at 10, 50 and 100 °C s-1 from room temperature to 1050 °C was tested. Phase transformation on heating was studied by…
Journal of Materials Science. 2022;57(9):5620-5633.
DOI : 10.1007/s10853-022-06959-6
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
A polycrystalline plasticity model, which incorporates the contribution of deformation twinning, is proposed. For this purpose, each material point is treated as a composite material consisting of a parent constituent and multiple twin variants. In the constitutive equations, the twin volume fractio…
Journal of Theoretical, Computational and Applied Mechanics. 2022;7562.
DOI : 10.46298/jtcam.7562
X-Light is an open-source software that is written in Python with a graphical user interface. X-Light was developed to determine residual stress by X-ray diffraction. This software can process the 0D, 1D and 2D diffraction data obtained with laboratory diffractometers or synchrotron radiation. X-Lig…
Journal of Applied Crystallography. 2021;54(4):1244-1251.
DOI : 10.1107/S160057672100618X
The mechanical response of polycrystalline materials to an externally applied load and their in-service performance depend on the local load partitioning among the constituent crystals. In hexagonal close-packed polycrystals such load partitioning is significantly affected by deformation twinning. H…
Communications Materials. 2021;2(1):9-1-9-11.
DOI : 10.1038/s43246-020-00105-y
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
A generic methodology to deal with the mechanics of beams and shafts with cracks is presented. The elastic energy of the system under static loading is written in a comprehensive manner to remarkably reduce the 3D computations indispensable to the identification of the crack breathing mechanism. Wit…
International Journal for Numerical Methods in Engineering. 2020;121(15):3362-3381.
DOI : 10.1002/nme.6361
The model of Johnson and Cook, which includes a viscoplastic flow rule and a damage criterion, is widely used to describe the mechanical behaviour of metallic materials subjected to severe loading conditions, such as those encountered during fabrication operations or impact. This model has been buil…
Mechanics of Materials. 2020;143:103340.
DOI : 10.1016/j.mechmat.2020.103340
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 development of fatigue damage in metallic materials is a complex process influenced by both intrinsic (e.g. texture, defects) and extrinsic (e.g. loading mode, frequency) factors. To better understand this process, some efforts have been made to develop microstructure-sensitive models that consi…
Philosophical Magazine. 2020;100(8):955-981.
DOI : 10.1080/14786435.2020.1713412
Understanding the deformation mechanisms of hexagonal close-packed (HCP) polycrystals at the grain scale is crucial for developing both macro and micro scale predictive models. Slip and twinning are the two main deformation mechanisms of HCP polycrystals at room temperature. In this paper, the devel…
Acta Materialia. 2020;196:733-746.
DOI : 10.1016/j.actamat.2020.07.010
Procedia Structural Integrity. 2019;19:566-574.
DOI : 10.1016/j.prostr.2019.12.061
In this work, a hyperelastic constitutive model is developed to describe the thermo-mechanical behavior of the Ti17 titanium alloy. The grain shape and the crystallographic orientation are explicitly taken into account. The behavior of both theαandβphases is modelled with a crystal plasticity formul…
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
Polycrystalline elasto-plasticity models provide a general framework for investigating the effect of microstructural heterogeneities (e.g. grains, inclusions, pores) on the high cycle fatigue behavior of metallic materials. In this work, continuum damage mechanics is used to construct a set of const…
International Journal of Damage Mechanics. 2018;838-856.
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
Geometrical defects are known to have a detrimental influence on the high cycle fatigue resistance of metallic alloys, smaller defects being less harmful. In this experimental work, the influence of the defect size on the high cycle fatigue behavior of polycrystalline aluminium with different grain …
International Journal of Fatigue. 2018;17-25.
Since a decrease of the fatigue strength may result from punching operations, this study proposes a methodology for designing punched parts against high cycle fatigue crack initiation. To reach this goal, high cycle fatigue tests are performed on different specimens configurations with either punche…
Procedia Engineering. 2018;213:691-698.
FFT-based homogenization methods aim at calculating the effective behavior of heterogeneous materials with periodic microstructures. These methods operate on a regular grid of voxels, and hence require an appropriate spatial discretization of periodic microstructures. However, when different microst…
Mechanics of Materials. 2017;105:157-165.
DOI : 10.1016/j.mechmat.2016.12.002
The macroscopic behavior of polycrystalline materials is largely influenced by the shape, the arrangement and the orientation of crystallites. Different methods have thus been developed to determine the effective behavior of such materials as a function of their microstructural features. In this wor…
2016..
Stress-controlled fatigue tests were run at different R ratios (¼ r min =r max) up to at most 3 million cycles on a 2.5%Cr–1%Mo steel (ASTM A182 F22) used in riser tubes connectors for offshore oil drilling. The fatigue lives, as well as the slope of the S–N curves were found to decrease with increa…
International Journal of Fatigue. 2016;82(part 3):437-448.
DOI : 10.1016/j.ijfatigue.2015.08.028
In this paper, the impact of punching operations on the high cycle fatigue strength of Fe–Si thin sheets is investigated. High cycle fatigue tests are performed on both punched and polished edge specimens. Results show a significant decrease of the fatigue strength in the case of punched specimens. …
International Journal of Fatigue. 2016;82, Part 3:721–729.
DOI : 10.1016/j.ijfatigue.2015.09.030
In this paper, a polycrystalline model is proposed to describe the fatigue behaviour of metallic materials in the high cycle fatigue regime. The model is based on a multiscale approach, which allows the connection of local deformation and damage mechanisms to macroscopic behaviour. To consider the a…
International Journal of Damage Mechanics. 2016;25(5):611-628.
DOI : 10.1177/1056789516650247
Some parts of electrical machines are built from stacks of thin steel sheets, for which the coarse grain microstructure allows for minimizing magnetic losses. The fabrication process of these parts usually involves punching operations that generate important defects on the edges. Since these alterat…
Materials Performance and Characterization. 2016;5(3):1-15.
DOI : 10.1520/MPC20150063
Because of their improved magnetic properties, Fe-Si alloys are widely used for new electric motor generations. The use of punching process to obtain these components specially affects their mechanical behavior and fatigue strength. This work aims at studying the influence of punching operations on …
Procedia Structural Integrity. 2016;2:3256-3263.
DOI : 10.1016/j.prostr.2016.06.406
In this work, a crystal plasticity constitutive model is proposed to describe the mechanical behavior of metallic materials for which twinning plays a significant role in the deformation process. Constitutive relations are obtained from a micromechanical approach that explicitly considers the intera…
International Journal of Plasticity. 2016;85:156-171.
DOI : 10.1016/j.ijplas.2016.07.007
Rotors of electric machines are built from stacks of thin steel sheets. The fabrication process of these components usually involves punching operations that generate defects on the steel sheet edges. In this study, high cycle fatigue tests are performed on punched and polished edges specimens to in…
Procedia Engineering. 2015;133:556-561.
For many metallic alloys, fatigue crack initiation is governed by the development of a localized plastic activity at the grain scale. Because of the irreversible nature of plasticity, a significant proportion of the total work is dissipated into heat during a cyclic loading. As a consequence, one ma…
2015;1p..
The macroscopic behavior of polycrystalline materials is largely influenced by the shape, the arrangement and the orientation of crystallites. Different methods have thus been developed to determine the effective behavior of such materials as a function of their microstructural features. In this wor…
Computational Materials Science. 2015;103:134-144.
DOI : 10.1016/j.commatsci.2015.03.028
The self-consistent scheme is a common homogenization method that was developed to connect local deformation mechanisms to the overall behavior of heterogeneous disordered materials. In the past decades, many efforts have been made to obtain extensions of the self-consistent approximation to the non…
2015..
La méthode autocohérente [1] est un des outils permettant de faire le lien entre les mécanismes de déformation à l'échelle locale et le comportement macroscopique effectif. Si la méthode autocohérente a été initialement développée pour des comportements locaux linéaires, des extensions ont été propo…
2014..
In-service loading conditions usually generate complex cyclic stress states. As such, the choice of an appropriate multiaxial fatigue criterion plays a crucial role in obtaining correct fatigue predictions. In the case of high cycle fatigue, the observation of the stabilized behavior is generally re…
2014..
L’amélioration du rendement des moteurs à aimants permanents impose d’utiliser de nouvelles nuances de tôles ferromagnétiques d’épaisseur inférieure au demi-millimètre. Les propriétés mécaniques de ces tôles, et en particulier leur comportement en fatigue, sont encore très peu étudiées. Or le dévelo…
2013..
In the case of cyclic plasticity, the validity of a constitutive model is usually assessed using stress-strain curves. However, this description can be enriched by adopting an energetic point of view. Thus, in the present work, a multiscale model is developed to estimate the amount of energy which i…
2013;1-6.
Lorsqu’un matériau métallique est soumis à un chargement cyclique, sa microstructure évolue au cours des cycles ce qui se traduit, à l’échelle macroscopique, par une évolution du comportement mécanique. La qualité d’un modèle multiéchelle est donc tributaire de sa capacité à proposer une description…
2013..
To obtain robust estimations of the fatigue limit from energy-based fatigue criteria, constitutive laws must include a correct description of the energy balance when modeling the cyclic behavior. The present paper aims at providing a better understanding of the evolution of the energy balance at bot…
Mechanics of Materials. 2013;60:93-106.
DOI : 10.1016/j.mechmat.2013.01.011
A micromechanical model is proposed to describe the interactions between the microstructure and the dissipative deformation mechanisms in ferritic steels under cyclic loading. The model aims at optimizing the microstructure of steels since the dissipative mechanisms can be responsible for the initia…
International Journal of Plasticity. 2012;32-33:106-120.
DOI : 10.1016/j.ijplas.2011.12.004
At room temperature, the behavior of Zircaloy-2 is controlled by plastic slip and twinning. To assist in interpretation of experimental texture measurements and to understand how texture is influenced by the different deformation mechanisms operating (prismatic, basal and pyramidal slip and tensile …
Materials Science and Engineering: A. 2011;528(29-30):8676-8686.
DOI : 10.1016/j.msea.2011.08.040
A newmicromechanical modelling is proposed to correlate some microstructural parameters and dissipation in ferritic steels under cyclic loading.We assumed the occurrence of two dissipative mechanisms associated with anelastic and inelastic deformations, respectively. We showed that the modelling pro…
Metallurgical Research & Technology. 2010;107(1):3-8.
DOI : 10.1051/metal/2010005
International Journal of Solids and Structures. 2009;46(2):pp 223-237.
International Journal of Fatigue. 2009;1-37.
La rupture en fatigue à grand nombre de cycles est une des sources de défaillance les plus fréquentes pour des pièces en service. Dans le cas des aciers, l'endommagement par fatigue trouve ses origines microstructurales dans des mécanismes liés aux mouvements des dislocations. L'objectif du présent …
2007..
L'élévation de température dans les aciers sous chargement cyclique est une manifestation de l'existence de mécanismes irréversibles qui sont aussi à l'origine de l'amorçage des microfissures. Ainsi, afin d'optimiser la microstructure des aciers pour le comportement en fatigue, un modèle polycristal…
2007..