| Formation of deformation twins near crack tips in deformed nanocrystalline materials is theoretical described. Within the suggested model, deformation twins are generated and evolve through ideal nanoshear events carried by nanodisturbances and initiated by high local stresses in the vicinities of crack tips. The nanoscale twin formation releases in part local stresses near crack tips and thus hampers crack growth in pre-cracked nanocrystalline solids. |
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