Influence of the temperature-induced martensitic-austenitic transformation on the strength properties of high-alloy steels under dynamic loading

Combustion, Explosion, and Shock Waves - The dynamic elastic limit and spall strength of high-alloy chromium-manganese-nickel steel in the martensitic-austenitic transformation induced by a change...     

Submicrosecond polymorphic transformations accompanying shock compression of graphite

The effect of the structure factors and temperature on the transformation of shock-compressed graphite to diamond or a diamond-like phase has been investigated. It has been revealed a significant effect of the shock compression direction with respect to the crystallographic planes of graphite on the detected pressure and rate of the transformation. The effect is more pronounced in more ordered graphite. The main structure parameter determining the transformation rate is the degree of the three-dimensional ordering of graphite. The transformation pressure decreases with heating. The extrapolation of the results to the high-temperature region and their comparison with the data on the direct transformation of statically compressed graphite to diamond indicate that the “above-barrier” state should be apparently reached to ensure the irreducible transformation to cubic diamond.     

Kinetics of the enrichment of boron-salt ores in a boiling layer

We give the results of a theoretical and experimental investigation of the kinetics of the dissolution of boron-salt ores of the Inder deposit in a boiling layer.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 47, No. 4, pp. 630–635, October, 1984.     

Peculiarities of the elastic-plastic transition and failure in polycrystalline vanadium under shock-wave loading conditions

Technical Physics Letters - Specific features in the deformation of polycrystalline vanadium under shock-wave loading conditions have been studied by experimental and theoretical methods. Analysis...     

Preparation and Thermal Expansion of Calcium Iron Zirconium Phosphates with the NaZr<Subscript>2</Subscript>(PO<Subscript>4</Subscript>)<Subscript>3</Subscript> Structure

Ca_{0.5(1 + x)}Zr_2–xFe _x (PO₄)₃ phosphates have been synthesized by a sol–gel process. The individual compounds and solid solutions obtained crystallize in the NaZr₂(PO₄)₃ structure (trigonal symmetry, sp. gr. R\(\bar 3\)). Using high-temperature X-ray diffraction, we have determined their thermal expansion parameters in the temperature range from 25 to 800°C. With increasing x, the magnitudes of their linear thermal expansion coefficients and thermal expansion anisotropy decrease. Most of the synthesized phosphates can be rated as low-thermal-expansion compounds and can be regarded as materials capable of withstanding thermal “stress.”     

The Spall Strength and Dynamic Yield Stress of Hafnium

Technical Physics Letters - The spall strength and dynamic yield stress of polycrystalline hafnium have been measured in a series of plane-wave shock loading experiments using flat...