PERMANENT RESEARCHERS

Joel DOUIN
Benoît DEVINCRE
Ladislas KUBIN
Georges SAADA
Patrick VEYSSIERE

PhD STUDENTS

Christophe DE SANSAL

 

Crystal defects and Plasticity

This theme covers three aspects of plasticity:

  • The first aspect, which is mostly experimental, is related to the interactions between dislocations and their consequences regarding the self-organization of the microstructure in intermetallic alloys. Transmission electron microscopy is the main technique used to examine dislocations and microstructures, as well as the associated local stress fields. Deformation micromechanisms
  • The second aspect is more numerical. It makes use of mesoscopic simulations of dislocation dynamics, alone or coupled to a finite element code. The applications contribute to the development of multiscale models, with particular emphasis on the connection between discrete and continuum aspects of plasticity. Mesoscopic simulations of dislocation dynamics
  • The third aspect is related to the modeling of plastic instabilities and strain localizations in dilute alloys exhibiting jerky flow (the Portevin - Le Chatelier effect). Several types of non linear dynamics associated with Portevin - Le Chatelier bands have been identified. The spatial aspects are now modeled either analytically or numerically, using a FE code for the polycrystal. Plastic instabilities and non linear dynamics

 

2nd International Conference on the Fundamentals of Plastic Deformation

September 13-17, 2004

La Colle-sur-Loup, France

Organizing Commitee:

Benoît DEVINCRE (ONERA/LEM), Patrick VEYSSIERE (ONERA/LEM) et David RODNEY (GPM2)

Abstract Dead line: February 29, 2004