Using the method of transmission electron microscopy (TEM) of thin foils, nucleation and propagation of microckracks are studied in different plastic zone structures. An interrelation between the fine structure around the microcracks and the types and parameters of the dislocation substructure formed by the point of fracture of the material, i.e. its low-stability state in the vicinity of a structural transformation into a state with cracks is found out. The main factors characterizing the dislocation density in the substructures are identified. These factors are the misorientation boundaries of various origins and long-range stress fields. The changes of the plastic zone structure and its parameters are examined from the mactrocrack and its tip inwards the material.
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Trishkina, L.I., Klopotov, A.A., Potekaev, A.I. et al. Peculiarities of Microcrack Propagation in Substructures. Russ Phys J 66, 416–431 (2023). https://doi.org/10.1007/s11182-023-02956-7
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DOI: https://doi.org/10.1007/s11182-023-02956-7