Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-585-C7-590
Description of heterogeneous dislocations distributionsG. SAADA
LEM CNRS ONERA, BP. 72, 92322 Chatillon cedex, France
Different approximations for the description of the internal stress field due to dislocations walls are given and discussed.The influence of disorder and the edge effects due to incomplete walls are particularly discussed. Finally the relationship between the internal stress and the flow stress are discussed in these particular cases. It is shown that identifying the flow stress with the intemal stress averaged in the volume of the crystal may be misleading. Consequences on the propagation of glide bands are also examined.
© EDP Sciences 1993