Development of ultrafine-grained tungsten-based materials for applications under conditions of high-velocity impact

The effect of green porosity of powder specimens and dispersion of nanostructured tungsten powder specimens on the density of sintered alloys of the tungsten – nickel system is investigated. It is shown that the maximum density of the alloys is achieved during liquid-phase sintering of powder compacts for one hour irrespective of their initial porosity within the range from 30 to 65 vol.%. Dispersion of the nanostructured tungsten powders also affects the final porosity. Using the calculations and experimental studies, the effective penetration of cylindrical striker bars made from the WNi-91 tungsten-nickel alloy into steel plates is investigated.     

Destruction Features of Impactors Made of a Porous Alloy Based on Tungsten with Reinforcing Filler When Interacting with Armored Obstacles

Technical Physics - In this study, we perform calculations and experimental studies of the destruction of composite impactors from a porous tungsten–nickel–iron–cobalt alloy with...     

Sintering aluminum in the presence of a liquid phase

A study has been made of the sintering of aluminum in the presence of a liquid phase formed on addition of copper, this liquid phase being formed as a result of contact melting between the different kinds of particles. The effects of the concentration of copper and the sintering temperature on the amount of liquid phase formed during sintering, the extent of contraction of the compacts, and their hardness and structure have been investigated.Translated from Izvestiya VUZ. Fizika, Vol. 11, No. 8, pp. 12–17, August, 1968.     

Mathematical Modeling of Deformation and Fracture of Cermets under Dynamic Loading Conditions

The behavior of cermets under shock-wave loading conditions is examined. The materials under study are produced by self-propagating high-temperature synthesis. A mathematical model for calculating the stress-strain state and fracture of the TiB + B₄C-based cermet is developed.     

Effect of the Initial Temperature on the Penetration of Tungsten-Based Porous Alloy Strikers with a Hardening Filler into a Steel Obstacle

Technical Physics - We propose a series of experiments aimed at analysis of peculiarities and revealing general regularities in the penetrability of strikers made of a composite material based on...     

Investigation of the protective properties of cermets of combined structure under high-velocity impact

The use of self-propagating high-temperature synthesis (SHS) for the production of cermets of combined structure is considered and a mathematical simulation of the behavior of these materials under high-velocity impact by a projectile is presented. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 12–19, July, 2008.