Formation of Gradient Multiphase Nanostructured Surface Layers Using the Electron-Ion-Plasma Combined Method

2015 ◽  
Vol 756 ◽  
pp. 236-242 ◽  
Author(s):  
Yuriy F. Ivanov ◽  
Anton D. Teresov ◽  
Olga V. Ivanova ◽  
Victor E. Gromov ◽  
Evgeniy A. Budovskikh ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Subsequent Treatment ◽  
Nanostructured Surface ◽  
Combined Method ◽  
Surface Layers ◽  
Pulsed Electron Beam ◽  
Mechanical And Tribological Properties ◽  
Ion Plasma ◽  
Defect Substructure ◽  
Mechanical And Tribological Characteristics

The data of the study of the elemental and phase composition, the condition of the defect substructure, mechanical and tribological characteristics of titanium alloy VT6 subjected to electroexplosive carburization with a sample of titanium diboride powder and the subsequent treatment by high-intensity pulsed electron beam is presented. It has been established that the main mechanisms responsible for an increase in the mechanical and tribological properties of the material are solid, dispersion, and grain boundary.

scholarly journals VT6 TITANIUM ALLOY WEARABILITY INCREASE VIA IMPLANTATION OF COPPER AND ALUMINUM IONS

2019 ◽  
Vol 16 (32) ◽  
pp. 945-966
Author(s):  
V. V. OVCHINNIKOV ◽  
N. V. UCHEVATKINA ◽  
I. A. KURBATOVA ◽  
E. V. LUKYANENKO ◽  
S. V. YAKUTINA
Keyword(s):  
Titanium Alloy ◽  
Phase State ◽  
Copper Ions ◽  
Structural Phase ◽  
Intermetallic Phases ◽  
Surface Layers ◽  
Structural Phase State ◽  
Mechanical And Tribological Properties ◽  
Aluminum Ions ◽  
Implantation Process

The relevance of the article is due to the fact that the use of titanium alloys within friction joints is restrained by their low resistance to wear while traditional methods of increasing their wear resistance are ineffective. The objective of this work was to study the processes occurring on the surface of VT6 titanium alloy samples when implanting with copper and aluminum ions, as well as in friction. Elemental composition, structural-phase state, mechanical and tribological properties of VT6 titanium alloy surface layers modified by aluminum and copper ions during the high-intensity ion-implantation process was being researched. As can be seen from the undertaken studies, the mode of the high-intensity ion-implantation process makes it possible to obtain ion doped surface layers of VT6 alloy containing TiAl, Ti3Al, Ti3Cu, Ti2Cu, TiCu finely dispersed intermetallic phases and a solid solution of aluminum and copper in titanium of composition varying in depth. The thickness of the ion-doped layer, the average grain size of the intermetallic phases (from 18 to 55nm) and their conglomerates (from 45 to 280 nm) increases with the increase in implantation dose from 2⋅1017 to 1.2⋅1019 ion/cm2 while aluminum implantation (from 0.42 to 2.1 μm) is in progress. It has been shown that the implantation of aluminum and copper ions into VT6 alloy leads to a considerable increase in its microhardness and wearability. Based on the research results, a conclusion on the positive effect of a structural-phase state of ion-doped titanium layers on their mechanical and tribological properties of VT6 titanium alloy has been drawn.

Options for Forming of Nanostructured Surface Coatings

2014 ◽  
Vol 1064 ◽  
pp. 154-159
Author(s):  
P.O. Rusinov ◽  
Zh.M. Blednova ◽  
М.I. Chaevsky
Keyword(s):  
Plasma Nitriding ◽  
Glow Discharge Plasma ◽  
Thermal Mass ◽  
Nanostructured Surface ◽  
Combined Method ◽  
Surface Layers ◽  
Ionic Nitriding ◽  
Cyclic Durability ◽  
Nanostructured Layers ◽  
Corrosive Environments

The possible technologies of formation of nanostructured surface layers: a method of thermal mass transfer in a high temperature gradient; the combined method, comprising plasma nitriding a cathode in a low pressure and deposition of titanium nitride in a single process cycle; combined method comprising an ionic nitriding and high frequency deposition of chromium carbide by pyrolysis of organic chromium compounds in a glow discharge plasma are considered. The possibility of formation of nanostructured layers is shown. Examples of the practical use of these technologies are given. The tests found that the use of the combined coating nitriding + TiN increases cyclic durability of machinery parts in contact loading conditions and corrosive environments on the two orders, providing a specified level of reliability and combined nitriding + CrC coating on steel С1050 allowed to reach values ​​of the fatigue limit under Impact NaCl 400 MPa.

Structural-phase changes in surface layers of elements made of VT6 titanium alloy under irradiation by high-current pulsed electron beam

2013 ◽  
Vol 4 (3) ◽  
pp. 189-192 ◽  
Author(s):  
V. A. Shulov ◽  
A. G. Paikin ◽  
D. A. Teryaev ◽  
O. A. Bytsenko ◽  
V. I. Engel’ko ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Structural Phase ◽  
Phase Changes ◽  
High Current ◽  
Surface Layers ◽  
Pulsed Electron Beam

scholarly journals Nanocrystallization of Coarse Primary Phases in Al- and Mg-Based Alloys Induced by HCPEB Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gao Bo ◽  
He Jidong ◽  
Tu Ganfeng ◽  
Hu Liang
Keyword(s):  
Primary Phase ◽  
High Current ◽  
Nanostructured Surface ◽  
Surface Layers ◽  
Pulsed Electron Beam ◽  
Surface Nanocrystallization ◽  
Modified Surface ◽  
Multiple Pulses ◽  
And Diffusion ◽  
Modified Surface Layer

This paper reports on a phenomenon associated with high-current pulsed electron beam (HCPEB) treatment: surface nanocrystallization of coarse primary phase in hypereutectic Al17.5Si and quasicrystal alloys after multiple pulses of HCPEB irradiation. The HCPEB treatment induces superfast heating and diffusion of alloying elements and heterogeneous nucleation in a melting solution, followed by rapid solidification and cooling of the material surfaces. Consequently, nanostructured surface layers can be achieved easily. Nano-Si phase and nano-quasicrystal phase formation on the modified surface layer of hypereutectic Al17.5Si alloy and quasicrystal alloy (Mg37Zn60Y3) show a potential for surface nanocrystallization of materials with enhanced properties by HCPEB treatment.

Structure changes in the surface layers of Ti-6Al-4V titanium alloy under electron beam treatment

2017 ◽  
Author(s):  
Elena Sinyakova ◽  
Alexey Panin ◽  
Olga Perevalova ◽  
Marina Kazachenok ◽  
Yurii Ivanov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Treatment ◽  
Surface Layers ◽  
Structure Changes

The Structure and Mechanical Properties of VT23 Welded Joints with Surface Layer Modified by Ultrasonic Mechanical Forging

2017 ◽  
Vol 743 ◽  
pp. 264-268 ◽  
Author(s):  
Anastasia Smirnova ◽  
Yury Pochivalov ◽  
Victor Panin ◽  
Anatoly Orishich ◽  
Aleksandr Malikov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Welded Joints ◽  
Experimental Tests ◽  
Relaxation Property ◽  
Surface Layers ◽  
Β Phase ◽  
Fatigue Life Test ◽  
Vt23 Titanium Alloy

The structure and mechanical properties of welded joints of VT23 titanium alloy received by method of laser welding after modifying the surface layers by ultrasonic mechanical forging (Treatment 1 and Treatment 2) were investigated. The experimental tests have revealed that the Treatment 2 provides a multiple increase in the relaxation property in fatigue life test. The formation of nonuniform distribution of vanadium, chromium and molybdenum in the welded joint increases the strength and, at the same time, the brittleness of β-phase. Mechanical treatment of the surface layers in the second mode provides a multiple increase in ductility up to 13%, in the as-received condition up to 9.9%. In consequence of plastic deformation, the β-phase intensity reduces twice with Treatment 2 which is related to its clustering. As follows from a presented data, the fatigue life of the VT23 titanium alloy has increased more than threefold.

scholarly journals Physical model of «substrate-coating» system structuring in complex modification processes of surface layers in working parts of dies and press molds

2018 ◽  
Vol 2018 (11) ◽  
pp. 35-41
Author(s):  
Олег Морозов ◽  
Oleg Morozov ◽  
Валерий Кокорин ◽  
Valeriy Kokorin ◽  
Владимир Табаков ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Physical Model ◽  
Cold Plastic Deformation ◽  
Coating System ◽  
Resistant Steel ◽  
Surface Layers ◽  
Heat Resistant Steel ◽  
Plasma Sputtering ◽  
Ion Plasma ◽  
Wear Coatings

Basic methods to increase durability of die working parts including processes of cold plastic deformation at anti-wear coatings application by a method of ion-plasma sputtering are considered. A physical model of cold plastic deformation of samples made of heat-resistant steel H12M is presented.

scholarly journals STRUCTURAL AND PHASE CHANGES OF THE SURFACE LAYERS OF HEATRESISTANT MULTICOMPONENT COATING OF ION-PLASMA COATING Ni-Cr-Al-Y AFTER MODIFICATION BY HIGH-CURRENT ELECTRON BEAMS MICROSECOND DURATION

2020 ◽  
Vol 17 (34) ◽  
pp. 459-468
Author(s):  
Oksana A BYTSENKO ◽  
Igor G STESHENKO ◽  
Vladimir A PANOV ◽  
Victor V TISHKOV ◽  
Alexey B MARKOV
Keyword(s):  
Electron Beams ◽  
Structural Phase ◽  
Plasma Coating ◽  
Phase Changes ◽  
High Current ◽  
Surface Layers ◽  
Heat Resistant ◽  
Ion Plasma ◽  
Current Electron ◽  
High Current Electron

The development of aerospace engineering and mechanical engineering directly depends on the development of new metal materials and advanced technologies. The problem of creating materials and their types of processing to increase the level of operational properties is relevant in connection with the complication and tightening of working conditions of modern technologies. One of the most important tasks of contemporary aircraft construction is to increase the operational properties of the surface layer. The purpose of the article is to elucidate the effect of high-current electron beams of microsecond duration on changes in the surface layers of the heat-resistant multicomponent ion-plasma coating Ni-Cr-Al-Y under various conditions. Using a complex of metallophysical research methods, the physicochemical and structural-phase states of the surface layer were studied before and after modification of the samples. These samples were coated with heat-resistant condensed ion-plasma coatings of three different compositions using nine high-current electron beams in 9 modes with different values of electron energy and number of pulses in the selected interval of electron energy. An analysis of the structural phase changes occurring during modification was carried out. Cylindrical samples of targets made of heat-resistant nickel alloy ZhS36 coated with ion-plasma condensed multicomponent coating SDP-2 + VSDP-16. These samples were used according to serial technology, both with subsequent modification using highcurrent electron beams and without modification. It was found that chromium in the initial state is unevenly distributed: chromium is present in the particles; the matrix is depleted in chromium. The research results can be useful for scientists to study the properties of heat-resistant multicomponent ion-plasma coatings Ni-Cr-Al-Y and the effect of high-current electron beams on it, as well as for the manufacture of more heat-resistant materials in aerospace engineering and mechanical engineering.

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