Laboratoire Interactions Materiau Procede Environnement

France

Laboratoire Interactions Materiau Procede Environnement

France
SEARCH FILTERS
Time filter
Source Type

Denguir L.A.,Arts et Metiers ParisTech | Denguir L.A.,Laboratory Interdisciplinaire Carnot de Bourgogne | Outeiro J.C.,Arts et Metiers ParisTech | Fromentin G.,Arts et Metiers ParisTech | And 4 more authors.
Journal of Materials Processing Technology | Year: 2017

Due to the rising interest in predicting machined surface integrity and sustainability, various models for metal cutting simulation have been developed. However, their accuracy depends deeply on the physical description of the machining process. This study aims to develop an orthogonal cutting model for surface integrity prediction, which includes a physical-based constitutive model of Oxygen Free High Conductivity (OFHC) copper. This constitutive model incorporates the effects of the state of stress and microstructure on the work material behavior, as well as a dislocation density-based model for surface integrity prediction. The coefficients of the constitutive model were identified through a hybrid experimental/numerical approach, consisting in mechanical tests, numerical simulations and an optimization-based algorithm. The orthogonal cutting model was simulated by FEM, using ALE formulation, and was validated by comparing predicted and measured results, including residual stresses, dislocation density and grain size. The model is then used to analyze the influence of the cutting parameters and cutting geometry on surface integrity, and its results are compared to those obtained by the Johnson-Cook model. © 2017 Elsevier B.V.


Outeiro J.C.,Arts et Metiers ParisTech | Campocasso S.,Arts et Metiers ParisTech | Campocasso S.,CEA Valduc Center for Nuclear Studies | Denguir L.A.,Arts et Metiers ParisTech | And 5 more authors.
CIRP Annals - Manufacturing Technology | Year: 2015

Strain distributions in the machined surface and subsurface of OFHC copper workpieces were determined experimentally and through numerical simulations. An experimental setup, comprising a double frame camera and a pulsed laser, was developed to measure the displacement fields using the digital image correlation (DIC) technique; strain distributions were then calculated. A numerical orthogonal cutting model was also developed and applied in order to predict such distributions. Comparison between simulated and measured results enabled an understanding of the fundamental mechanisms of plastic deformation of the machined surface of OFHC copper. © 2015 CIRP.


Vignal V.,Laboratory Interdisciplinaire Carnot de Bourgogne | Vignal V.,Laboratoire Interactions Materiau Procede Environnement | Ringeval S.,CEA Valduc Center for Nuclear Studies | Ringeval S.,Laboratoire Interactions Materiau Procede Environnement | And 12 more authors.
Corrosion Science | Year: 2014

The microstructure of grade X4CrNiMo16.5.1 stainless steel was studied at different scales. The chemical composition of the native passive film formed on the different phases was then determined at the microscale. The degree of homogeneity of the native passive film is discussed. Subsequently, the susceptibility to pitting corrosion of X4CrNiMo16.5.1 was quantified using the electrochemical microcell technique. The nature of precursor sites and the morphology of pits were investigated by combining scanning electron microscopy with Electron BackScatter Diffraction and potentiostatic pulse tests. The role of the microstructure and the cold-worked layer generated by polishing in pitting is discussed. © 2014 Elsevier Ltd.


Vignal V.,Laboratory Interdisciplinaire Carnot de Bourgogne | Vignal V.,Laboratoire Interactions Materiau Procede Environnement | Richoux V.,Laboratory Interdisciplinaire Carnot de Bourgogne | Richoux V.,Laboratoire Interactions Materiau Procede Environnement | And 6 more authors.
Materials and Design | Year: 2015

In this paper, the corrosion behavior of welded stainless steels is studied by means of the potentiostatic pulse testing method. The evolution of the average pit density and the average pit surface area at the mouth in each zone of the welds is discussed considering its PREN value and its microstructure determined from electron backscatter diffraction (EBSD) experiments. Critical parameters leading to pitting are proposed and weak zones of the welded joints are identified. © 2015 Elsevier Ltd.

Loading Laboratoire Interactions Materiau Procede Environnement collaborators
Loading Laboratoire Interactions Materiau Procede Environnement collaborators