Atomic-scale plasticity in the presence of Frank loops

Experimental Analysis of Slip Systems Activation in Neutron-Irradiated Zirconium Alloys and Comparison with Polycrystalline Model Simulations

“…Therefore, the screw dislocations cannot be correctly observed as shown schematically in Figure 4. The fact that mainly screw dislocations are observed within the channel is in good agreement with the mechanism for dislocation channeling proposed by Nogaret et al [24,25] By using molecular dynamic computation and dislocation dynamic simulations, these authors have shown that wavy and heavily jogged screw dislocations are present in the cleared band. Indeed, screw dislocations are strongly pinned by the helix turns formed by the absorption of loops as shown in References 10, 24, and 25.…”

A polycrystalline modeling of the mechanical behavior of neutron irradiated zirconium alloys

“…Concerning the interaction between the pyramidal <c + a> slip system and the <a> loops it is believed that the interaction is strong but this is still an ongoing topic of research. More generally, details of the dislocations channeling mechanism are not yet clearly understood despite recent progress in that field [31,32].…”

Clear band formation simulated by dislocation dynamics: Role of helical turns and pile-ups

“…Systematic studies were performed by molecular dynamics (MD) simulations [10,11]. The interaction mechanisms with Frank loops and SFTs were found in strong analogy.…”