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Pedun D.E.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Poyda V.P.,University of Kharkiv | Bryukhovetsky V.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Poyda A.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Sukhov R.V.,University of Kharkiv
Problems of Atomic Science and Technology | Year: 2013

The optimum temperature - strain rate conditions of the effect of high-temperature structural superplasticity manifestation by specimens of alloy AMg2M are determined. In the near-surface cavities and cracks which formed and developed in the working part of the specimens of alloy AMg2M during superplastic deformation, the fibrous structures are detected. The chemical composition and morphology of fibrous structures are investigated. The kinetics of the phase transformation in the alloy AMg2M during heating of its specimens to a test temperature is investigated. The possible reasons of partial melting of alloy at high homologous temperatures are analyzed. Source


Poyda V.P.,University of Kharkiv | Mila D.E.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Poyda A.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Bryukhovetsky V.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Sukhov R.V.,University of Kharkiv
Problems of Atomic Science and Technology | Year: 2014

It is determined that the concentration of magnesium in the grain boundaries of the specimens of alloy 01420T is increased compared to its average concentration in the alloy and in the middle of the grain. Increased concentration of magnesium in the surface regions of the grains leads to their partial melting during deformation at high homologous temperatures. As a result, viscous liquid phase, which promotes implementation of grain boundary sliding - the primary mechanism of superplastic deformation appears on grain boundaries. The determining role of magnesium in the formation and development of fibrous structures is shown. Source


Poyda A.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Poyda V.P.,University of Kharkiv | Bryukhovetsky V.V.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | Milaya D.E.,Institute of Electrophysics and Radiating Technologies NAS of Ukraine | And 2 more authors.
Problems of Atomic Science and Technology | Year: 2016

The structural state of the specimens of alloy 6111, prepared for mechanical testing is studied. The likely causes of partial melting of the specimens at high homologous temperatures, which leads to the formation of metastable liquid phase at the grain boundaries are analyzed. The morphology of fibrous structures formed and developed during superplastic deformation of the alloy specimens 6111 is studied. © 2016, National Science Center, Kharkov Institute of Physics and Technology. All rights reserved. Source

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