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To reveal the mechanism of fracture at the nanoscale requires discerning the evolution process of the crack tip under the application of increased stress intensity, which is strongly affected by the local atomic structure, lattice orientation, inter-atomic potentials, and generation of defects (e.g., dislocations and twins).

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In order to obtain a deeper understanding of the fracture mechanism, an insight into the evolution of the crack end under increasing stress amplitude. And, it requires to note that the crack end evolution process is highly dependent on the local atomic structure, lattice orientation, inter-atomic potentials, and generation of defects (e.g., dislocations and twins).
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In order to obtain a deeper understanding of the fracture mechanism, an insight into the evolution of the crack end under increasing stress amplitude is essential. And, it requires to note that the crack end evolution process is highly dependent on the local atomic structure, lattice orientation, inter-atomic potentials, and generation of defects (e.g., dislocations and twins).
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