Odessa State Academy of Cold
Odessa State Academy of Cold
Bryukhanova A.A.,The National Pedagogical University |
Fassmanb D.,Leibniz University of Hanover |
Bryukhanovac Z.A.,Odessa State Academy of Cold
Physics of Metals and Metallography | Year: 2012
Effect of the rate of tensile strain on the yield stress and texture of sheets of steel St1.0312 (0.06% C, to 0.35% Mn, to 0.40% Si, ~0.025% S and P) has been studied. It has been found that at small strain rates a quasi-axial -011) texture is formed in the sheets of the steel in the rolling direction. An increase in the strain rate leads to the formation of a plane upsetting texture and increases the yield stress of the sheets in the direction of tension. High rates of deformation decrease the yield stress of the sheets because of the increase in the coefficient of damage and lead to a tensile-type texture in the rolling direction and of a com- pression-type texture in the normal direction due to the activation of multiple twinning. © Pleiades Publishing, Ltd., 2012.
Bondarenko V.L.,Moscow State Technical University |
Dyachenko T.V.,Odessa State Academy of Cold |
Simonenko Y.M.,Odessa State Academy of Cold
Chemical and Petroleum Engineering | Year: 2010
A series of devices is created for purifying a neon-helium mixture from nitrogen that predominates within it by condensation at 68-78 K. The reflux condensers are distinguished by compactness, that permits location in the immediate vicinity of air separation units, i.e., sources of crude material and liquid nitrogen. A reduction in the concentration of extraneous impurities in the neon-helium mixture makes it possible to reduce transport flow rates and storage delays due to a reduction in the "unproductive" part of the cylinder stock. © 2010 Springer Science+Business Media, Inc.
Shvets T.V.,Odessa State Academy of Cold |
Shvets V.T.,Odessa State Academy of Cold
Physics of Metals and Metallography | Year: 2011
Based on the variational principle, an expression has been obtained for the coefficient of electrical resistance of simple disordered metals. The parameters of decoupling of higher-order Green's functions that arise when deriving the quantum kinetic equation have been chosen based on the condition of the coincidence of the Boltzmann equation and the quantum kinetic equation in the lower-order perturbation theory. For the first time, the contribution of cross scattering to the resistance of disordered metals in the limiting case of low temperatures has been calculated. It has been shown that with allowance for the terms of fourth and higher orders the resistivity can be expressed through both the relaxation time and the density of states of the electron gas interacting with ions. All the effects considered are on the order of Latin small letter h/εF τ, where εF is the Fermi energy and τ is the relaxation time, and are significant for the majority of simple disordered metals. © 2011 Pleiades Publishing, Ltd.