Russian Ministry of the Emergency Situations

About: Russian Ministry of the Emergency Situations is a government organization based out in Moscow, Russia. It is known for research contribution in the topics: Combustion & Liquid crystal. The organization has 218 authors who have published 172 publications receiving 453 citations. The organization is also known as: Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters.

Strong bimetallic structural material alloyed with nitrogen

Abstract: The production of strong two-layer steel sheet—a bimetallic structure with a basic layer of low-carbon manganese microalloyed bainitic steel and an applied layer of two-phase austenite–ferrite stainless steel alloyed with nitrogen—is considered. In trials, the production of bimetallic material on the basis of the electrical-arc surfacing is investigated: specifically, the application of high-alloy steel to a plane microalloyed steel blank, by means of welding wire (under a flux layer), with subsequent hot deformation. The trials include the simulation of forced sheet cooling on the exit conveyer of the broad-strip mill and slow cooling of the final coiled strip. The microstructure, mechanical strength, and corrosion resistance of the bimetallic structural material are investigated. The proposed material matches the corrosion resistance of existing bimetals. Its yield point and the adhesive strength of the two layers exceed those of traditional two-layer steel by at least 30–50% and are three times the standard requirements.

The role played by self-inhibition in combustion processes

Abstract: The absence of correlations between the heat of combustion of substances and substance combustion characteristics is shown to be caused by the special features of competition between reaction chain branching and termination, including partial participation of fuels in the inhibition of their oxidation. By way of example, differences in the characteristics of combustion of hydrocarbons and hydrogen at atmospheric pressure and the mechanisms of the development of chain avalanches in these processes are considered.

Towards the dynamics of the temperature field gradient in a layer of an inorganic material under radiation heating according to the data of experiments and numerical modeling

Abstract: We have investigated the process of temperature field formation in a layer of a weakly conducting medium with the example of wood and green moss under irradiation of one side with an energy flux and contact heat removal through the opposite back surface of the material onto an asbestos-cement support. The experimental results were compared with the data calculated on the basis of the relations of nonstationary heat transfer in the approximations of closeness and openness of the system. The conditions for heat removal suppression have been concretized and the role of the energy exchange under the prolonged action of radiant energy for estimating the thermal stability parameters of related materials has been elucidated. The obtained data can be used to control radiant fluxes in treating wood, for effective heating of living and industrial premises, improving the methods for opposing high energy fluxes, and preventing the propagation of fire in inhabited localities and in park and forest zones.