Studies on strain-hardening models for structural steels at a directed reduction in sizes of their structural elements

A number of structural-mechanical strain-hardening models was analyzed, they were experimentally approved on austenitic and ferritic-pearlitic steels at a successive reduction in the sizes of their structural elements by thermomechanical treatments. The effect of a crystalline lattice of the matrix phase on the evolution of the steel structure, from the grain and mesolevels to micro-and nanolevels, was examined. The influence of a Mode I crack on an enhanced martensite transformation near its tip was noticed, which caused a simultaneous increase in the strength and cyclic fracture toughness of austenitic steel.