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Article
Analysis of microplastic deformation processes of surface layers of nitrided structural steels
A model of microplastic deformation in surface layers of nitrided structural steels under the incoherent boundaries of nanodisperse reinforcing particles formed upon thermochemical treatment is considered, all...
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Article
Mechanical Properties of Surface Layers of Structural Steels After Nitriding and Possibilities of Adaptation of Their Nanostructure to Contact Deformation
The mechanism of plasticity of surface layers of structural steels after nitriding that yields nanosize particles with incoherent boundaries is considered with allowance for the possibility of adaptation diffu...
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Article
Strengthening surface layers of samples made of steel 45 using microplasma treatment
The results of experimental studies of the strong local interaction of microplasma discharges with samples made of steel 45 are presented. On the surface layer of the samples, a remelted area with altered micr...
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Article
Influence of the activation of the nicarbing process on mechanical properties of heat-resistant steel
The results of evaluating the microhardness, durability, and back-to-back endurance of heat-resistant VKS-7 and VKS-10 steels after the nicarbing process have been presented. The evaluation consisted of two st...
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Article
Mechanical properties of hot-working steels after activization of cementation process
The article concerns the results of estimation of microhardness, wear resistance and contact endurance of hot-working steels VKS-7 and VKS-10 after activization of the cementation process including two stages:...
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Article
Improvement of mechanical properties of heat-resistant steels by activation of the nitriding process
Values of hardness, wear resistance, and contact endurance limits for steels VKS-7 and VKS-10 found experimentally in various test conditions are presented. Characteristics of mechanical properties of heat-res...
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Article
Recovery of the efficiency of shaft-insert friction pair of plain bearings via laser cladding
The paper presents results of metallographic and tribological tests of steel 38X3MA samples coated by nickel-based powder materials using a fiber laser. Microhardness, wear rate, scoring resistance, and antifr...
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Article
Physical fundamentals of criterial estimation of nitriding technology for parts of friction units
Characteristics of the structure and properties of surface layers of nitrided structural steels and alloys, which affect the level of surface fracture under friction, are studied. A generalized structural para...
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Article
Creation of a hard microrelief on a titanium surface processed by microplasma discharges with a current amplitude of 200 A and pulse duration of 20 ms
The interaction of microplasma discharges with samples made of VT1 commercial titanium was studied experimentally. The amplitude of the current pulses of microplasma discharges was 200 A, the pulse duration wa...
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Article
Strain hardening and wear resistance of nitrated steels and alloys
This study considers the results of an experimental evaluation of the ability of superficial layers of nitrated steels and alloys to resist damage in the conditions of frictional deformation and superficial pl...
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Article
Effect of microplasma discharges on aluminum surfaces
Excitation of microplasma discharges on the surfaces of V95 aluminum alloy samples placed in a uniform pulsed plasma flow was studied experimentally. Strong localized interaction of microplasma discharges with...
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Article
The influence of the composition of nanostructural PSZ powders on ceramics wear
The results of tribological testing of ceramics with the composition ZrO2 + Al2O3, ZrO2 + Y2O3, and ZrO2 + Y2O3 + Al2O3 made of nanostructural powders are presented. The nanopowders have been obtained by chemical...
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Article
Effect of composition and structure of nitrided iron alloys on wear resistance under friction and sliding
Characteristic features of the formation of the wear-resistant structure of the nitrided model alloys with body-centered cubic (bcc) and face-centered cubic (fcc) lattices are studied, including Fe-Mo, Fe-Cr, ...
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Article
Effect of nitriding on wear resistance of iron alloys with various lattice types
The paper considers the characteristics of the formation of the wear-resistant structure of nitrided model alloys with bcc and fcc lattices: Fe-Mo, Fe-Cr, Fe-Al, Fe-Ni-Cr, Fe-Ni-Al, Fe-Ni-Ti, and Fe-Ni-Cr-Al-T...
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Article
Strong localized interaction of microplasma discharges with titanium
Excitation of microplasma discharges on the surfaces of titanium samples placed in a uniform pulsed plasma flow was studied experimentally. Strong localized interaction of microplasma discharges with titanium ...
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Article
Structure and wear resistance of nitrided multicomponent bcc and fcc iron alloys
Regular features of changes in the structure, hardness, and wear resistance of diffusion layer are studied as a function of the composition of alloys with austenitic and ferritic matrices. Relationships betwee...
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Article
Influence of microplasma machining on the surface structure and microgeometry and tribological behavior of structural alloys
Experimental investigation results of local interaction of microplasma discharges with samples made of different structural and triboengineering materials—namely, nickel-chrome (Ni-Cr), cobalt-chrome (Co-Cr), ...
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Article
Improvement of triboengineering characteristics of movable couples in motor oils
The paper presents the results of investigation of friction and wear processes in the M14V2 tin-containing lubricating composition developed at the Gubkin Oil and Gas State University using modern ideas of the ef...
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Article
Effect of laser treatment on the case structure of constructional steels and their wear resistance
Investigations of the case structure and wear resistance of constructional steels 40X, 20X, 45, and IIIX 15 hardened by laser treatment are carried out. The damage of the contact surface of friction pairs hard...
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Article
Method of implementation of the positive gradient of mechanical properties of triboengineering materials
Modern methods of implementation of the rule of positive gradient of mechanical properties are considered; this rule was formulated by I.V. Kragelskii and its application serves to minimize the friction and we...
