Study of localized shear fracture mechanisms in alloys under dynamic loading

The split Hopkinson - Kolsky bar was used to perform dynamic tests on АМг6 alloy samples during target perforation. Thermodynamics of the deformation process was investigated to identify the characteristic strain localization stages through in-situ recoding of temperature fields with the infra-red camera CEDIP Silver 450M. Temperature measurements made in the localization zone have not provided sufficient evidence for the traditional strain localization mechanism occurred due to thermoplastic instability. In order to study the phenomenon of plastic strain localization with the split Hopkinson-Kolsky bar, a series of dynamic experiments were carried out on specially developed samples made of АМг6, Д16 and Steel 3 alloys using the StrainMaster system, which offers non-invasive shape, strain and stress measurements. Displacement and strain fields were constructed for the samples made of АМг6, Д16 and Steel 3 alloys tested under dynamic loading using the split Hopkinson - Kolsky bar...