Modelling of the evolution of dislocation sheets during strain-path changes and their influence on the Bauschinger effect of B.C.C. polycrystals

B. Peeters; C. Teodosiu; S.R. Kalidindi; P. Van Houtte; E. Aernoudt

doi:doi:10.1051/jp4:2001515

Numéro		J. Phys. IV France Volume 11, Numéro PR5, Septembre 2001 5^th European Mechanics of Materials Conference on Scale Transitions from Atomistics to Continuum Plasticity EUROMECH-MECAMAT'2001


Page(s)		Pr5-119 - Pr5-126
DOI		https://doi.org/10.1051/jp4:2001515

5^th European Mechanics of Materials Conference on Scale Transitions from Atomistics to Continuum Plasticity
EUROMECH-MECAMAT'2001

J. Phys. IV France 11 (2001) Pr5-119-Pr5-126
DOI: 10.1051/jp4:2001515

Modelling of the evolution of dislocation sheets during strain-path changes and their influence on the Bauschinger effect of B.C.C. polycrystals

B. Peeters¹, C. Teodosiu², S.R. Kalidindi³, P. Van Houtte¹ and E. Aernoudt¹

¹ Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark ARENBERG 44, 3001 Heverlee, Belgium
² LPMTM-CNRS, Université Paris-Nord, 93430 Villetaneuse, France
³ Department of Materials Engineering, Drexel University, Philadelphia, PA 19104, U.S.A.

Abstract
An extension of a full-constraints Taylor model is presented which captures substructural dislocation features, e.g. cell boundaries and cell-block boundaries. This allows coupling the anisotropy due to slip processes, texture and substructure. The extended Taylor model is used to study the dislocation sheets during reverse tests. The evolution of these structures in crystals with stable/unstable orientation is discussed in the context of the Bauschinger effect observed during reverse tests.