Abstract
Results of investigation into strength and elasto-plastic properties of 30KhGSA steel are presented. The investigation was performed with planar samples using submicrosecond shockwave length technique. Shockwave amplitude varied in the range from 4 to 26 GPa and controlled with 0.2% accuracy. Steel sample temperature varied in the range from-90 °C to 670 °C. Stress wave profiles in the samples were registered with VISAR and PDV interferometers having nanosecond time resolution and measurement error better than 0.8%. Special attention was payed to the study of spall fracture incipience and development processes as well as damage recovery (healing), and shockwave passing through the damaged region in steel samples. Relaxation characteristics of dynamic elastic limit were determined. Spall strength magnitude versus strain rate and temperature characteristics was determined. The impact of polymorphic α↔ε transition in 30KhGSA steel on spall strength was studied.
Highlights
Chromium-silicon-manganese steel 30KhGSA, owing to its high strength and good weldability, is widely used in different industries, especially in aircraft industry. This steel, like iron, exhibits wide spectrum of behavioral features and properties in dynamic processes. This allows it to be considered as an important model material when studying shock wave impacts on solids
The shock wave structure in solids is defined by processes of their viscoelastoplastic deformation, phase transitions, and fracture incipience and development kinetics [1,2,3]
This paper presents the results of investigation into strength and elasto-plastic properties of 30KhGSA alloyed steel in submicrosecond shockwave length range
Summary
Chromium-silicon-manganese steel 30KhGSA (chromansil), owing to its high strength and good weldability, is widely used in different industries, especially in aircraft industry. This steel, like iron, exhibits wide spectrum of behavioral features and properties in dynamic processes. This allows it to be considered as an important model material when studying shock wave impacts on solids. Spall strength magnitude versus deformation velocity was determined, the temperature effect and polymorphic α↔ε transition impact on spall strength at deformation velocities of 104 - 106 s-1 were studied
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