Experimental and numerical investigation of local stress and strain heterogeneities in a bainitic steel
Conférence invitée
Auteur
DIARD, OlivierMATHIEU, Jean-PhilippeSTUDER, VincentINAL, Karim 
PESCI, RaphaëlRésumé
A specific in-situ tensile device has been set up in an X-Ray diffractometer. Stress can be measured at low temperature during loading in the baintic steel and in the ferritic phase. A two-scale modeling has been proposed and evaluated on three levels, means stress in the baintic steel, stress in the ferritic phase and stress heterogeneities in the ferritic phase. Simulations are in general agreement with experiments.
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Article dans une revue avec comité de lecture; ; ; ;PESCI, Raphaël (Wiley-Blackwell, 2006)
Stress analyses by X-ray diffraction are performed on a cast duplex (32% ferrite) stainless steel elbow and a bainitic (95% ferrite) pressure vessel steel. During an in situ tensile test, micrographic observations are made ...
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Article dans une revue avec comité de lecture; ; ; ;BERVEILLER, Sophie; PESCI, Raphaël (Trans Tech Publications Inc, 2006)
A Kossel microdiffraction experimental set up is under development inside a Scanning Electron Microscope (SEM) in order to determine the crystallographic orientation as well as the inter- and intragranular strains and ...
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Article dans une revue avec comité de lecture; ; ;PESCI, Raphaël (Trans Tech Publications Inc, 2002)
The behavior and the fracture mechanisms of the 16MND5 bainitic pressure vessel steel are studied using a local approach of fracture on a crystallographic scale. A series of tensile tests are performed on the material ...
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Conférence invitée; ;PESCI, Raphaël (Jacques Besson, Dominique Moinereau, Dirk Steglich, 2006)
A series of in-situ tensile tests was performed at various low temperatures to characterize the mechanical properties and the fracture processes of the 16MND5 steel: the damage was observed with a SEM and the internal ...
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Article dans une revue avec comité de lecture; ;PESCI, Raphaël (Elsevier, 2009)
An original approach is proposed to predict the behavior of the16MND5bainitic steel (similar to U.S. A508 cl.3) in the lower range of the ductile-to-brittle transition region and at lower temperatures [−196 ◦C; 20 ◦C], by ...