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Impact of intragranular substructure parameters on the forming limit diagrams of single-phase B.C.C. steels

Article dans une revue avec comité de lecture
Author
FRANZ, Gérald
39101 Laboratoire des technologies innovantes - UR UPJV 3899 [LTI]
ccABED-MERAIM, Farid 
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
BERVEILLER, Marcel

URI
http://www.mdpi.com/1996-1944/6/11/5217
http://hdl.handle.net/10985/10008
DOI
10.3390/ma6115217
Date
2013
Journal
Materials

Abstract

An advanced elastic-plastic self-consistent polycrystalline model, accounting for intragranular microstructure development and evolution, is coupled with a bifurcation-based localization criterion and applied to the numerical investigation of the impact of microstructural patterns on ductility of single-phase steels. The proposed multiscale model, taking into account essential microstructural aspects, such as initial and induced textures, dislocation densities, and softening mechanisms, allows us to emphasize the relationship between intragranular microstructure of B.C.C. steels and their ductility. A qualitative study in terms of forming limit diagrams for various dislocation networks, during monotonic loading tests, is conducted in order to analyze the impact of intragranular substructure parameters on the formability of single-phase B.C.C. steels.

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