CRISM Prometey

St.Petersburg, Russia

CRISM Prometey

St.Petersburg, Russia

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Engelko V.,D.V. Efremov Scientific Research Institute of Eelectrophysical Apparatus | Mueller G.,Karlsruhe Institute of Technology | Rusanov A.,RAS Institute of Physics and Power Engineering | Markov V.,CRISM PROMETEY | And 5 more authors.
Journal of Nuclear Materials | Year: 2011

The alloying of steel surface with aluminum (Al) using Microsecond-pulsed Intense Electron Beams (MIEB-Al) was developed and optimized in order to be used for improving the corrosion resistance of the 316, 1.4970 and T91 steels, exposed to liquid Pb and Pb-Bi-eutectic. The procedure consists in two steps: (i) coating the steel surface with Al or an Al-containing alloy layer and (ii) melting the coating layer and the steel surface layer using intense pulsed electron beam. In order to cover the steel surface with an homogeneous and crack-free Al-alloyed layer, the following experimental conditions are required: Al coating thickness range 5-10 μm, electron kinetic energy 120 keV; pulse duration 30 μs; energy density 40-45 J/cm2; number of pulses 2-3. Using the mentioned procedure, the corrosion resistance of the 316, T91 and 1.4970 steels, exposed to Pb and Pb-Bi-eutectic with different oxygen concentrations and under different temperatures, was considerably improved due to the formation of a thin alumina layer (which thickness is lower than 1 μm for all the tested temperatures and durations) acting as an anti-corrosion barrier. © 2011 Published by Elsevier B.V.


Gorynin I.,CRISM Prometey | Karzov G.,CRISM Prometey | Timofeev B.,CRISM Prometey | Vasilieva N.,CRISM Prometey | Bazaras Z.,Kaunas University of Technology
Intelligent Technologies in Logistics and Mechatronics Systems, ITELMS 2015 - Proceedings of the 10th International Conference | Year: 2015

The paper presents semicentennial way of materials development for stationary nuclear reactors cases in our country and abroad subject to the high safety and operability assurance during a long (more than 60 years) lifetime.


Nesterova E.V.,CRISM Prometey | Bouvier S.,CNRS Roberval Laboratory (Mechanical Research Unit) | Bacroix B.,University of Paris 13
Materials Characterization | Year: 2015

Transmission electron microscopy (TEM) microstructures of a high-strength dual-phase steel DP800 have been examined after moderate plastic deformations in simple shear and uniaxial tension. Special attention has been paid to the effect of the intergranular hard phase (martensite) on the microstructure evolution in the near-grain boundary regions. Quantitative parameters of dislocation patterning have been determined and compared with the similar characteristics of previously examined single-phase steels. The dislocation patterning in the interiors of the ferrite grains in DP800 steel is found to be similar to that already observed in the single-phase IF (Interstitial Free) steel whereas the martensite-affected zones present a delay in patterning and display very high gradients of continuous (gradual) disorientations associated with local internal stresses. The above stresses are shown to control the work-hardening of dual-phase materials at moderate strains for monotonic loading and are assumed to influence their microstructure evolution and mechanical behavior under strain-path changes. © 2014 Elsevier Inc. All rights reserved.


Kodzhaspirov G.E.,Saint Petersburg State Polytechnic University | Rudskoy A.I.,CRISM Prometey
Advanced Materials Research | Year: 2010

The effect of Thermomechanical Processing ( TMP) on the fine structure (dislocation density and fragments evolution), recrystallization, carbide transformations and tendency toward intercrystalline corrosion (ICC) and corrosion-mechanical strength of AISI 321 type steels is described. It's shown that the grain size and overall amount of carbide phase has almost no effect on ICC. With an increase in dislocation density a tendency is observed toward a reduction in corrosion rate, but increases with an increase in proportion of recrystallized material. This connection is explained by an increasing of the level of local microstresses, which may be arranged structurally in the form of partial disclinations and aggravate ICC. A new test procedure was developed for estimating the corrosion-mechanical strength of steel. It follows from the obtained data that the hot working with the following accelerate cooling under industrial conditions does not develop a tendency toward corrosion cracking in 3% agueous NaCl solution. © (2010) Trans Tech Publications.


Margolin B.Z.,CRISM Prometey | Nikolayev V.A.,CRISM Prometey | Yurchenko E.V.,CRISM Prometey | Nikolayev Y.A.,RAS Research Center Kurchatov Institute | And 2 more authors.
International Journal of Pressure Vessels and Piping | Year: 2012

Analysis of embrittlement for WWER-1000 RPV materials is performed on the basis of available and original experimental data. Contributions of thermal aging and neutron irradiation to embrittlement are considered for base and weld metals. Equations have been obtained for the shift of the critical temperature of brittleness as a function of irradiation time and neutron fluence. For weld metal with high nickel content the dependence of the radiation embrittlement coefficient on the content of alloying elements affecting material embrittlement such as nickel, manganese and silicon has been obtained. © 2011 Elsevier Ltd.


Zolotorevsky N.,Saint Petersburg State Polytechnic University | Nesterova E.,CRISM Prometey | Titovets Y.,Saint Petersburg State Polytechnic University | Khlusova E.,CRISM Prometey
International Journal of Materials Research | Year: 2013

A modeling approach to calculate the kinetics of non-isothermal bainite formation in low carbon microalloyed steels is presented. The model development is based on experimental data obtained by means of deformation dilatometry and electron back scattering diffraction. It is suggested that the misorientations inherited from the plastically deformed austenite make a significant contribution to the misorientation distribution in the final microstructure. Taking the inheritance phenomenon into consideration, the model allows prediction of the transformation kinetics and the effective grain size of bainitic microstructure as a function of the austenite deformation level and the cooling rate. © Carl Hanser Verlag GmbH & Co. KG.


Gulenko A.G.,CRISM Prometey | Margolin B.Z.,CRISM Prometey | Buchatsky A.A.,CRISM Prometey | Kashtanov A.D.,CRISM Prometey
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2013

Experimental investigations of the creep-rupture properties of metal of intermediate heat exchangers (IHX) from fast breeder reactor BN-600 after its operation during ∼ 170 thousands hours over temperature range of 500-550°C were carried out. IHX was produced from 18Cr-9Ni steel. To study the role of thermal aging part of the IHX metal was annealed at 1000-1050°C for 0.5 hours. Comparison of experimental results of aging metal and annealed metal was carried out and the microstructure and fractography of both materials examined. The effect of aging on the creep-rupture properties of 18Cr-9Ni steel was revealed and described by the physical and mechanical model of intergranular fracture. On the basis of experimental and calculative results an explanation of the effect of long-term aging on the mechanical short-term and creep-rupture properties of 18Cr-9Ni steel has been provided. Copyright © 2013 by ASME.


Gorynin I.,CRISM Prometey | Timofeev B.,CRISM Prometey | Bazaras Z.,Kaunas University of Technology
Intelligent Technologies in Logistics and Mechatronics Systems, ITELMS 2011 - Proceedings of the 6th International Conference | Year: 2011

The generalized data on influence of operational temperatures 250-350°C on mechanical properties of the materials used for manufacturing of the main equipment (RPV, SG) and pipelines of the Russian NPP with LWR (WWER and RBMK reactors) for a prolonged operation time (100000 hours) are submitted. Degradation of mechanical properties of structural steels from this factor during designed service life is appreciated, and also the forecast of an opportunity of use of these materials at prolongation of service life.


PubMed | CRISM Prometey
Type: Journal Article | Journal: Journal of nanoscience and nanotechnology | Year: 2012

The microstructure of a bimetallic joint made by explosion welding of orthorhombic titanium aluminide (Ti-30Al-16Nb-1Zr-1Mo) with commercially pure titanium is studied. It is found that the welded joint has a multilayered structure including a severely deformed zone observed in both materials, a recrystallized zone of titanium, and a transition zone near the interface. Typical elements of the transition zone-a wavy interface, macrorotations of the lattice, vortices and tracks of fragments of the initial materials-are determined. It is shown that the observed vortices are formed most probably due to local melting of the material near the contact surface. Evidence for this assumption is deduced from the presence of dipoles, which consist of two vortices of different helicity and an ultrafine duplex structure of the vortex. Also, high mixing of the material near the vortex is only possible by the turbulent transport whose coefficient is several orders of magnitude larger than the coefficient of atomic diffusion in liquids. The role played by fragmentation in both the formation of lattice macrorotations and the passage of coarse particles of one material through the bulk of the other is determined.


Rybin V.V.,CRISM Prometey | Greenberg B.A.,RAS Institute of Metal Physics | Ivanov M.A.,Ukrainian Academy of Sciences | Patselov A.M.,RAS Institute of Metal Physics | And 4 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2011

The microstructure of a bimetallic joint made by explosion welding of orthorhombic titanium aluminide (Ti-30Al-16Nb-1Zr-1Mo) with commercially pure titanium is studied. It is found that the welded joint has a multilayered structure including a severely deformed zone observed in both materials, a recrystallized zone of titanium, and a transition zone near the interface. Typical elements of the transition zone-a wavy interface, macrorotations of the lattice, vortices and tracks of fragments of the initial materials-are determined. It is shown that the observed vortices are formed most probably due to local melting of the material near the contact surface. Evidence for this assumption is deduced from the presence of dipoles, which consist of two vortices of different helicity and an ultrafine duplex structure of the vortex. Also, high mixing of the material near the vortex is only possible by the turbulent transport whose coefficient is several orders of magnitude larger than the coefficient of atomic diffusion in liquids. The role played by fragmentation in both the formation of lattice macrorotations and the passage of coarse particles of one material through the bulk of the other is determined. Copyright © 2011 American Scientific Publishers. All rights reserved.

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