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The paper presents a shear strength model used to evaluate information of interest from shock experiments aimed at studying the properties of the hardened 30KhGSA steel and the MA14 magnesium alloy subjected to low- and high-intensity loadings. The model parameters are adjusted by experimental deformation curves obtained from static and dynamic tests at different temperatures and the data from shock experiments to account for strength variation at high strain rates. The simulation of low-intensity loading tests helped to improve the description of elastic-plastic properties and to adjust our failure model. The data from the shock experiments with high-intensity loading of 30KhGSA steel samples and unloading of the shocked samples in window materials were used to verify the phase diagram and the kinetics of direct and inverse phase transitions, and to determine more exactly how the changed phase state influences the strength. The model presented here has allowed us to reproduce the complicated strength behavior of the MA14 alloy at different loading intensities. [ABSTRACT FROM AUTHOR]

The paper presents the results of studies of the temperature dependence behavior of magnesium alloy MA14T1 spall strength. The studies were performed using a light-gas gun by the impact method with the measurement of stress-waves profiles by a two-channel laser interferometer VISAR within one velocity loading range (~345 m/s). The temperature dependence of spall strength within the temperature range of 90°K...750°K was obtained. Changes in the shape and the amplitude of the elastic precursor in the specified temperature range were measured. [ABSTRACT FROM AUTHOR]

Spall strength of the 12Cr18Ni10Ti steel (analog of AISI 321H, 316, and 304L stainless steel), as well influence of its structure and chemical composition were studied in a series of VISAR-instrumented symmetrical planar shock experiments with the initial sample temperature ranging from 290 K to 750 K. The shock-loaded samples were recovered for further metallographic examination. Optical microscopy was used to study transverse cross-sections of the recovered samples while the spall-fracture surface was examined using a scanning electron microscope. Phase composition of recovered samples was studied by means of X-ray diffraction analysis. [ABSTRACT FROM AUTHOR]