Institute of Problems of Mechanical Engineering, Russian Academy of Sciences,
Bolshoj 61, Vas.
Ostrov, St. Petersburg 199178, Russia
| A theoretical model is suggested that describes partial and split dislocation configurations in deformed nanocrystalline metals. Ranges of parameters (grain size, applied stress, etc.) are calculated in which these dislocation configurations are energetically favorable. The model accounts for experimental data (Liao et al, Appl. Phys. Lett. 84 (2004) 3564) on observation of anomalously wide stacking faults that join partial dislocations in nanocrystalline aluminium. |
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