Sur le durcissement dû à la recombinaison des dislocations

Geometrically necessary dislocations and strain-gradient plasticity: a few critical issues

“…The flow stress is then mostly governed by short-range attractive intersections of non-coplanar dislocations. As was shown by early theoretical studies [7,8], and confirmed by experimental investigations [9], this leads to Eq. (1) with a ¼ 0:3 AE 0:1.…”

Some aspects of cross-slip mechanisms in metals and alloys

“…As already discussed in § 2, recent experimental information about cross slip in copper shows that the critical stress for this mechanism is clearly different from Tjjj, as well as its variation with the temperature [14]. Cross slip is probably active during stage III, but mixed together with other mechanisms such as the destruction of some types of junction reactions [51].…”

On the nature of attractive dislocation crossed states

“…However, the calculation of the shapes of flexible interacting dislocations is extremely complex [2]. The available studies are thus based on rather strong approximations, but nevertheless lead to reasonable estimates regarding the stress needed to destroy stable junction configurations [3,4]. In the recent years, dislocation intersections have been examined using dislocation dynamics (DD) simulations able to treat either junction formation and destruction and the detailed equilibrium shapes of junction configurations under stress [5][6][7].…”