Methods for evaluating fracture patterns of polycrystalline materials based on the parameter analysis of fatigue striations: A review.

A review of the main literature sources was conducted, which made it possible to systematise various techniques, methods and software for studying the fracture mechanisms of polycrystalline materials. The principles of describing the patterns of failure surfaces based on multi-scale analysis (at the macro-, meso‑ and microlevels) were considered. Algorithms that recognize and calculate the parameters of fatigue striations on SEM images are analysed. They proved to be functional and capable of providing a valuable information and fractographic control.