Acoustic emission analysis of the effect of temperature and deformation rate on the correlated formation of cracks of the structural element scale

The feasibility of both discrete and correlated cracking has been experimentally shown by the example of a model composite system with a characteristic structural element of $\sim$100-$\mu$m scale by varying the deformation rate and test temperature. The duration and intensity of the correlated cracking stage and its transformation to uncontrolled brittle fracture, i.e., the ductile-brittle transition, are controlled by the feasibility of dissipative properties of both structural elements and the composite system as a whole.