Aller au menu Aller au contenu
Science et ingénierie des matériaux et des procédés

> SIMAP_Groupes > SIMAP_GPM2

bicrystal

DISLOCATION MULTIPLICATION AND TRANSMISSION IN A BICRYSTAL


Random sources are introduced in a closed grain (lower dodecahedron).
    A tensile applied stress is applied along the vertical axis. Sources are then activated and a pile up is observed on the grain boundary. When the stress at the head dislocation in the pile up is high enough, a dislocation crosses the grain boundary and enters the upper grain.

    Such a situation naturally leads to the Hall-Petch relationship between the grain size and the yield stress.

Back to the DDD main page

mise à jour le 23 mars 2009

Univ. Grenoble Alpes