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Zaporozhe, Ukraine

Grigor'ev S.M.,Zaporozhe National University | Petrishchev A.S.,Kharkiv Polytechnic Institute
Steel in Translation | Year: 2015

The low-temperature treatment of metallized molybdenum concentrate with plasma-forming gas is analyzed. The phase composition, chemical composition, and structure of the refined product are carefully studied. © 2015, Allerton Press, Inc. Source


Psarev V.I.,Zaporozhe National University
Russian Journal of Non-Ferrous Metals | Year: 2010

The features of the formation of a system of microinclusions during the decomposition of supersaturated solid solutions are analytically described taking into account the size factor of interfacial surface energy. The suggested computation discloses the physical meaning of phenomena corresponding to phase transformation during the homogeneous and heterogeneous modes by which it proceeds. The supersaturation of the matrix phase is the determining characteristic of such a possibility at the stage of nanostructured nucleation. Unimodal and bimodal systems of microparticles can form at definite values of this quantity. Reliably established experimental facts confirm the conclusions of this theoretical analysis. The obtained solutions can be spread to the various bulk and surface systems of dispersed particles. © 2010 Allerton Press, Inc. Source


Grigor'ev S.M.,Zaporozhe National University | Petrishchev A.S.,Kharkiv Polytechnic Institute
Steel in Translation | Year: 2012

X-ray microanalysis is used to investigate the phase composition and microstructure of waste-based alloys with relatively low silicon content, which are intended for use in the production of high-speed steel. Possible reactions and phase transformations at all stages of refining are studied. The physicomechanical properties of the alloy are established. Guidelines are proposed for reducing waste and increasing the assimilation of alloying elements by the steel melt. © 2012 Allerton Press, Inc. Source


Grigor'ev S.M.,Zaporozhe National University | Petrishchev A.S.,Kharkiv Polytechnic Institute
Steel in Translation | Year: 2012

The phase composition and microstructure of the scale on P6M5Φ3 and P12M3K5Φ2 Steel are studied by X-ray microanalysis. The results are used to improve the utilization of refractory elements from the metal-oxide wastes of high-speed steel. © 2012 Allerton Press, Inc. Source


Girzhon V.V.,Zaporozhe National University | Smolyakov A.V.,Zaporozhe National University | Zakharenko N.I.,Taras Shevchenko National University | Babich N.G.,Taras Shevchenko National University | Semen'ko M.P.,Taras Shevchenko National University
Physics of Metals and Metallography | Year: 2011

It has been established using magnetometric methods that irreversible magnetic anisotropy appears in the amorphous ribbon of a 30KSR alloy after pulsed laser heating in an external magnetic field. Effects of laser heatings on the physical properties of the alloy, in particular, on the Curie temperature and the temperature of crystallization have been studied. It has been shown that the direction of the arising magnetic anisotropy does not coincide with the field direction during laser heating. A mechanism of the appearance of the uniaxial magnetic anisotropy of amorphous ribbons during pulsed laser heatings in a magnetic field by regimes which do not lead to crystallization has been suggested. © Pleiades Publishing, Ltd., 2011. Source

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