Effect of gradient nanostructures on the damage mechanism of aermet100 steel at various strain rates

The introduction of nano-scale grains, which form a gradient nanostructure (GNS) within the material, usually increases the service life of metallic materials. In this study, the uniaxial tensile mechanical properties of AerMet100 steel in initial and GNS states under different strain rate conditions were compared, and the microanalysis of tensile fracture was performed. It is found that GNS has little effect on the mechanical properties of AerMet100 but has an effect on its damage mode. The initial AerMet100 was basically ductile fracture, and GNS increased the brittle fracture mode in AerMet100.