Dynamic recrystallization behaviour of spheroidal graphite iron. Application to cutting operations
TypeArticles dans des revues avec comité de lecture
To increase the competitiveness of manufacturing processes, numerical approaches are unavoidable. Nevertheless, a precise knowledge of the thermo-mechanical behaviour of the materials is necessary to simulate accurately these processes. Previous experimental studies have provided a limited information concerning dynamic recrystallization of spheroidal graphite iron under hot cutting operations. The purpose of this paper is to develop a constitutive model able to describe accurately the occurrence of this phenomenon. Compression tests are carried out using a Gleeble 3500 thermo-mechanical simulator to determine the hot deformation behaviour of spheroidal graphite iron at high strains. Once the activation range of the dynamic recrystallization process is assessed, a constitutive model taking into account this phenomenon is developed and implemented in the Abaqus/Explicit software. Finally, a specific cutting test and its finite element model are introduced. The ability of the numerical model to predict the occurrence of dynamic recrystallization is then compared to experimental observations.
Files in this item
Showing items related by title, author, creator and subject.
LE MERCIER, Kévin; WATREMEZ, Michel; GUERIN, Jean-Daniel; FOUILLAND-PAILLE, Laurence; DUBAR, Laurent (2013)The main objective of this paper is to identify the thermo-mechanical behaviour at high temperature of the spheroidal graphite (SG) iron EN-GJS-700-2. In the rst instance, tensile and compression tests in austenitic phase ...
LE MERCIER, Kévin; FOUILLAND-PAILLE, Laurence; WATREMEZ, Michel; DUBAR, Laurent (2015)The objective of the present paper is to analyse the dynamic recrystallization process occurring during the hot cutting of spheroidal graphite iron. In the first instance, hot cutting tests are performed with an orthogonal ...
PUCHI-CABRERA, Eli-Saul; STAIA, Mariana; GUÉRIN, J.D.; IOST, Alain; DUBAR, Laurent (2016)The computation of the elastic contact stresses and particularly the detemination of the change in the von Mises stress from the surface of a coated system, when it is subjected to spherical indentation, constitutes an ...
SENECAUT, Yannick; WATREMEZ, Michel; BROCAIL, Julien; FOUILLAND-PAILLE, Laurence; DUBAR, Laurent (2015)In numerical approaches for high speed machining, the rheological behavior of machined materials is usually described by a Johnson Cook law. However, studies have shown that dynamic recrystallization phenomena appear during ...
Mechanical characterization of a prototype a-C:Cr,Si and its tribological behavior at high temperature STAIA, Mariana; DUBAR, Laurent; DUBAR, Mirentxu; PUCHI-CABRERA, Eli-Saul; IOST, Alain; DE BAETS, Patrick; DUBOIS, André (elsevier, 2016)The results of the mechanical and tribological characterization of a prototype a-C:Cr, Si sputtered coating are presented. The hardness and the elastic modulus of the coated system have been determined by means of ...