STRUCTURE, PHASE COMPOSITION AND PROPERTIES OF CP TITANIUM VT1-0 SURFACE LAYER, SUBJECTED TO ELECTROEXPLOSIVE ALLOYING AND SUBSEQUENT TREATMENT BY HIGH-INTENSITY PULSED ELECTRON BEAM

Modification of a titanium surface layer with yttrium using the combined technique of electroexplosive doping and the subsequent irradiation by a high-intensity electron beam is carried out. The studies on the structure, the element and the phase composition, mechanical and tribological properties of the doped layer are carried out. Formation of a multiphase submicron-nanocrystalline eutectic is revealed. A multifold increase in the microhardness, a decrease in the friction coefficient and the wear rate of the modified layer is established.

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Formation of a Nanostructured Hardened Surface Layer on the TiC-(Ni-Cr) Metal-Ceramic Alloy by Pulsed Electron-Beam Irradiation

Springer Tracts in Mechanical Engineering - Multiscale Biomechanics and Tribology of Inorganic and Organic Systems ◽

10.1007/978-3-030-60124-9_18 ◽

2020 ◽

pp. 421-459

Author(s):

Vladimir E. Ovcharenko ◽

Konstantin V. Ivanov ◽

Bao Hai Yu

Keyword(s):

Surface Layer ◽

Electron Beam ◽

Phase Composition ◽

Electron Beam Irradiation ◽

Strength Properties ◽

Beam Irradiation ◽

Surface Layers ◽

Pulsed Electron Beam ◽

Metal Ceramic ◽

Hardened Surface

AbstractThe efficiency and service life of products made from metal-ceramic tool alloys and used as cutting tools and friction units are determined by a combination of physical and strength properties of their surface layers with a thickness of up to 200 μm. Therefore, much attention is paid to their improvement at the present time. An effective way to increase the operational properties of the metal-ceramic alloy products is to modify the structure and the phase composition of the surface layers by forming multi-scale internal structures with a high proportion of low-dimensional (submicro and nano) components. For this purpose, surfaces are treated with concentrated energy fluxes. Pulse electron-beam irradiation (PEBI) in an inert gas plasma is one of the most effective methods. This chapter presents results of theoretical and experimental studies of this process. An example is the nanostructured hardened surface layer on the TiC-(Ni-Cr) metal-ceramic alloy (ratio of components 50:50) formed by PEBI in the plasma of argon, krypton, and xenon. Its multi-level structure, phase composition, as well as tribological and strength properties are shown.

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Liquid-phase boriding of high-chromium steel

Izvestiya Ferrous Metallurgy ◽

10.17073/0368-0797-2020-7-539-547 ◽

2020 ◽

Vol 63 (7) ◽

pp. 539-547

Author(s):

Yu. F. Ivanov ◽

V. E. Gromov ◽

D. A. Romanov ◽

O. V Ivanova ◽

A. D. Teresov

Keyword(s):

Surface Layer ◽

Electron Beam ◽

Materials Science ◽

Titanium Boride ◽

Relative Mass ◽

Initial State ◽

Boron Powder ◽

Pulsed Electron Beam ◽

Titanium Borides ◽

Electroexplosive Alloying

Using the methods of modern physical materials science, structuralphase states and tribological properties of 12Kh18N10T steel, subjected to electroexplosive alloying with titanium and boron and subsequent electron-beam processing in various modes depending on electron beam energy density, exposure pulse duration and their quantity have been analyzed. It has been established that electroexplosive alloying of steel with titanium and boron leads to formation of surface layer with multiphase submicro-nanocrystalline structure, characterized by presence of micropores, microcracks, and microcraters. Complex processing, combining electroexplosive alloying and subsequent irradiation with high-intensity pulsed electron beam, leads to formation of 60 μm thick multiphase submicro-nanocrystalline surface layer. It is shown that phase composition of surface layer of steel is determined by mass ratio of titanium and boron during electroexplosive alloying. Microhardness of modified layer is defined by relative mass fraction of titanium borides in surface layer and can be more than 18 times higher than microhardness of steel in its initial state (before electroexplosive alloying). Modes of complex processing have been determined at which surface layer containing exclusively titanium borides and intermetallic compounds based on titanium and iron is formed. The maximum (approximately 82 % by weight) titanium boride content is observed when steel is processed at regime with the highest mass of boron powder in the sample (mB = 87.5 mg; mTi /mB = 5.202). With decrease in mass of boron powder, relative content of borides in surface layer of steel decreases. It was found that integrated processing of steel is accompanied by sevenfold increase in microhardness of surface layer, wear resistance of steel increases by more than nine times.

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Effect of Pulsed Electron Beam Treatment and Hydrogen on Properties of Zirconium Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.302.66 ◽

2013 ◽

Vol 302 ◽

pp. 66-71 ◽

Cited By ~ 3

Author(s):

N.S. Pushilina ◽

Ekaterina N. Stepanova ◽

E.V. Berezneeva ◽

A.M. Lider ◽

Ivan P. Chernov ◽

...

Keyword(s):

Surface Layer ◽

Electron Beam ◽

Phase Composition ◽

Hydrogen Absorption ◽

Zirconium Alloy ◽

Electron Beam Treatment ◽

Pulsed Electron Beam ◽

Complex Morphology ◽

Modified Surface

The paper presents the results of the pulsed beam effect on the structure and phase composition of zirconium alloy. Such treatment is demonstrated to lead to forming of complex morphology martensite in the surface layer of the alloy. The processes of hydrogen absorption by zirconium alloy with modified surface have been studied. Modification of the samples is found to reduce the amount of hydrogen, absorbed by the volume of zirconium alloy during hydrogenation.

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Structure of the surface layer of a wear-resistant coating after treatment with a high-intensity electron beam

Journal of Surface Investigation X-ray Synchrotron and Neutron Techniques ◽

10.1134/s1027451015050134 ◽

2015 ◽

Vol 9 (5) ◽

pp. 934-938 ◽

Cited By ~ 4

Author(s):

S. V. Raykov ◽

E. V. Kapralov ◽

E. S. Vashchuk ◽

E. A. Budovskikh ◽

V. E. Gromov ◽

...

Keyword(s):

Surface Layer ◽

Electron Beam ◽

High Intensity ◽

Wear Resistant Coating ◽

Wear Resistant ◽

Resistant Coating

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The Effect of High-Intensity Electron Beam on the Crystal Structure, Phase Composition, and Properties of Al–Si Alloys with Different Silicon Content

Uspehi Fiziki Metallov ◽

10.15407/ufm.22.01.129 ◽

2021 ◽

Vol 22 (1) ◽

pp. 129-157

Author(s):

D. V. Zaguliaev ◽

S. V. Konovalov ◽

Yu. F. Ivanov ◽

V. E. Gromov ◽

V. V. Shlyarov ◽

...

Keyword(s):

Solid Solution ◽

Electron Beam ◽

Phase Composition ◽

Crystal Lattice ◽

High Intensity ◽

Materials Science ◽

Lattice Parameter ◽

Crystal Lattice Parameter ◽

Material Surface ◽

Modified Layer

The study deals with the element–phase composition, microstructure evolution, crystal-lattice parameter, and microdistortions as well as the size of the coherent scattering region in the Al–10.65Si–2.11Cu and Al–5.39Si–1.33Cu alloys irradiated with the high-intensity electron beam. As revealed by the methods of x-ray phase analysis, the principal phases in untreated alloys are the aluminium-based solid solution, silicon, intermetallics, and Fe2Al9Si2 phase. In addition, the Cu9Al4 phase is detected in Al–10.65Si–2.11Cu alloy. Processing alloys with the pulsed electron beam induces the transformation of lattice parameters of Al–10.65Si–2.11Cu (aluminium-based solid solution) and Al–5.39Si–1.33Cu (Al1 and Al2 phases). The reason for the crystal-lattice parameter change in the Al–10.65Si–2.11Cu and Al–5.39Si–1.33Cu alloys is suggested to be the changing concentration of alloying elements in the solid solution of these phases. As established, if a density of electron beam is of 30 and 50 J/cm2, the silicon and intermetallic compounds dissolve in the modified layer. The state-of-the-art methods of the physical materials science made possible to establish the formation of a layer with a nanocrystalline structure of the cell-type crystallization because of the material surface irradiation. The thickness of a modified layer depends on the parameters of the electron-beam treatment and reaches maximum of 90 µm at the energy density of 50 J/cm2. According to the transmission (TEM) and scanning (SEM) electron microscopy data, the silicon particles occupy the cell boundaries. Such changes in the structural and phase states of the materials response on their mechanical characteristics. To characterize the surface properties, the microhardness, wear parameter, and friction coefficient values are determined directly on the irradiated surface for all modification variants. As shown, the irradiation of the material surface with an intensive electron beam increases wear resistance and microhardness of the Al–10.65Si–2.11Cu and Al–5.39Si–1.33Cu alloys.

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