Dynamic Fracture Toughness of High-Strength 5KhN3МА Steel

High-strength martensitic–austenitic 5KhN3MA steel is subjected to static and impact bending tests. The crack initiation and propagation energies, the dynamic fracture toughness, the critical ductile–brittle transition temperature, and the fracture microrelief parameters are estimated. The influence of a preliminary shock-wave action on the strength and the dynamic fracture toughness of the steel is studied. The high-rate shock-wave action is...