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Dynamic recrystallization behaviour of spheroidal graphite iron. Application to cutting operations

Article dans une revue avec comité de lecture
Author
LE MERCIER, Kévin
WATREMEZ, Michel
PUCHI-CABRERA, Eli-Saul
DUBAR, Laurent
GUERIN, Jean-Daniel
FOUILLAND-PAILLE, Laurence
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/12954
DOI
10.1016/j.jmatprotec.2016.08.036
Date
2017
Journal
Journal of Materials Processing Technology

Abstract

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.

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