scholarly journals Structure formation in surface layer of machine parts by methods of high-vacuum annealing and ion implantation

2016 ◽  
Vol 1 (7) ◽  
pp. 10-13 ◽  
Author(s):  
Михаил Шалыгин ◽  
Mikhail Shalygin
Keyword(s):  
Surface Layer ◽  
Ion Implantation ◽  
Structure Formation ◽  
Vacuum Annealing ◽  
High Vacuum ◽  
Surface Layers ◽  
Steel Grades ◽  
Machine Parts

This paper reports the problems of hydrogen wear decrease in steel parts operating in hydrogen medium. The friction couples of particular machine parts subjected to hydrogen wear are shown. Steel grades of the samples analyzed and their hardness are pointed out. The technologies of high- vacuum annealing and ion implantation used in investigations are de-scribed. The modes for the carrying out of high-vacuum annealing and ion implantation of silicon into a surface of the samples investigated are presented. It is determined that in a surface layer after the carrying out of high-vacuum annealing and ion implantation appear new structures with their form similar to roundish spots. The dimensions of spots and their distribution according to depth are defined. The sample breaking tests are carried out. It is established that technological operations carried out affect only the surface layers of samples. The investigation results can be used at the analysis of methods for hydrogen wear decrease of parts operating in hydrogen medium.

TECHNOLOGY OF COMBINED ELECTROMECHANOULTRASONIC TREATMENT OF SURFACE LAYERS OF MACHINE PARTS

2020 ◽  
Vol 2 ◽  
pp. 26-33
Author(s):  
V.R. EDIGAROV
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Residual Stresses ◽  
Ultrasonic Treatment ◽  
Mechanical Treatment ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Surface Layers ◽  
Machine Parts ◽  
Acoustic Treatment

The technology of combined electro–mechanical–acoustic treatment is presented, which is a combination of electro–mechanical treatment and surface plastic deformation by ultrasonic treatment. Microhardness and residual stresses in strengthened EMUzO surface layer of machine parts investigated.

scholarly journals The study of the properties of steel 40X13 complex obtained by heat treatment– high vacuum annealing - diffusion saturation with silicon

2018 ◽  
Vol 2018 (1) ◽  
pp. 19-21 ◽  
Author(s):  
Анатолий Суслов ◽  
Anatoliy Suslov ◽  
Михаил Шалыгин ◽  
Mikhail Shalygin
Keyword(s):  
Heat Treatment ◽  
Surface Layer ◽  
Service Life ◽  
Vacuum Annealing ◽  
High Vacuum ◽  
Diffusion Saturation ◽  
Comprehensive Treatment ◽  
Promising Direction ◽  
And Diffusion

On based on the analysis of the possibility of hardening of steel 40x13 comprehensive treatment to a depth of 4.2 mm. the results of tests on the resistance to fracture and wear. Presents results of a study of hardness and micro geometry of the surface layer of samples. Comprehensive treatment, consisting of thermal and mechanical treatments, high-vacuum annealing and diffusion silicon may become a promising direction to increase the service life of steel parts

scholarly journals High technology to reduce hydrogen wear of work surfaces of friction

2016 ◽  
Vol 1 (10) ◽  
pp. 3-6 ◽  
Author(s):  
Михаил Шалыгин ◽  
Mikhail Shalygin
Keyword(s):  
Surface Layer ◽  
Thermal Treatment ◽  
Hydrogen Concentration ◽  
Vacuum Annealing ◽  
High Vacuum ◽  
High Technology ◽  
Wear Intensity ◽  
Quality Changes ◽  
Micro Hardness ◽  
Ionic Implantation

This paper reports the problems considered regarding the hydrogen wear decrease in steel parts operating in hydrogen medium and, in particular, in hydrocarbon liquids. The comparative researches are carried out with samples after thermal treatment, high-vacuum annealing and ionic implantation and also after a combination of these methods. The structure of samples surface layer is investigated after a combined working and the values of micro-hardness of layers formed are given. The investigation of surface quality changes is carried out. The results of comparative abrasion tests of samples are presented. It is defined that after a combined working samples wear decreased. There are shown data on the hydrogen concentration in a surface layer of samples and the analysis of surface properties for hydrogen concentration and hydrogen wear intensity is carried out.

Simple Model of Intermetallic Formation in Surface Layer during Ion Implantation

2015 ◽  
Vol 1085 ◽  
pp. 492-495
Author(s):  
Khan Asfandyar ◽  
Anna G. Knyazeva
Keyword(s):  
Surface Layer ◽  
Relaxation Time ◽  
Simple Model ◽  
Ion Implantation ◽  
Reaction Scheme ◽  
Surface Layers ◽  
Intermetallic Formation ◽  
Isothermal Conditions ◽  
Three Stages

Simple model has been formulated to describe intermetallic formation in surface layers during ion implantation. The isothermal conditions have been assumed. The reaction scheme includes three stages (a) Ni+Al→NiAl (b) 3Ni+Al→Ni3Al (c) Ni3Al+2Al→3NiAl. The finiteness of relaxation time taking into consideration in the model leads to specific distributions of elements and new phases. The general approach is illustrated with the help of some example.

Theoretical justifi cation for use of combined methods for hardening of surfaces of machine parts in order to control their fretting resistance

2020 ◽  
pp. 339-342
Author(s):  
V.F. Bez’yazychny ◽  
M.V. Timofeev ◽  
R.V. Lyubimov ◽  
E.V. Kiselev
Keyword(s):  
Surface Layer ◽  
Fatigue Limit ◽  
Surface Hardening ◽  
Theoretical Justification ◽  
Hardening Process ◽  
Subsequent Application ◽  
Machine Parts ◽  
Combined Methods

The theoretical justification for the hardening process of the surface layer of machine parts for combined methods of surface hardening with subsequent application of strengthening coatings, as well as reducing or increasing the fatigue limit due to the fretting process is presented.

The Vacancy Generation Influence on the Initial Stage of Ion Implantation

2015 ◽  
Vol 1097 ◽  
pp. 29-34
Author(s):  
E.S. Parfenova ◽  
Anna G. Knyazeva
Keyword(s):  
Surface Layer ◽  
Ion Implantation ◽  
Metal Surface ◽  
Impurity Concentration ◽  
Coupled Model ◽  
Irreversible Processes ◽  
Concentration Profiles ◽  
Thermodynamics Of Irreversible Processes ◽  
Vacancy Generation ◽  
Initial Stage

The coupled model is presented to describe the elements penetration into the surface layer of metal during the process of ion implantation. Mechanical stresses arising due to the interaction of particles with the surface affect the redistribution of the implanted impurity. In addition, the existence of vacancies in the metal surface and their generation under the stresses influence are taken into account. The kinetic law is written on the basis of the thermodynamics of irreversible processes. The solution had been found numerically. As a result, the distributions of impurity concentration and deformations have been obtained for various time moments. The comparison of the concentration profiles with vacancies and without their have been given.

The Effect of As+ Ion Implantation and Annealing on the Electrical Properties of Near-Surface Layers in Graded-Gap n-Hg0.78Cd0.22Te Films

2021 ◽  
Vol 47 (2) ◽  
pp. 189-192
Author(s):  
A. V. Voitsekhovskii ◽  
S. N. Nesmelov ◽  
S. M. Dzyadukh ◽  
V. S. Varavin ◽  
S. A. Dvoretskii ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Ion Implantation ◽  
Surface Layers ◽  
Near Surface

Electrokinetics, Adsorption and Colloid Study of Simulated Nuclear Waste Glasses Leached in Aqueous Solutions

1984 ◽  
Vol 44 ◽  
Author(s):  
Cheng T. Lee ◽  
D. E. Clark
Keyword(s):  
Surface Layer ◽  
Nuclear Waste ◽  
Glass Surface ◽  
Charged Particles ◽  
Electrostatic Repulsion ◽  
Surface Layers ◽  
Short Term ◽  
Chloride Solutions ◽  
Zeta Potentials ◽  
Glass Surfaces

AbstractZeta potentials of SRL-131-29.8% TOS simulated nuclear waste glasses leached in D.I. water, Al, Ca, Mg, and Zn chloride solutions at 90°C were measured as a function of leaching time. For short term leaching, the adsorption of Ca, Mg, Zn and Al reverses the glass surface potential from negative to positive. Colloids were found to be stable in D.I. water and AICl3 solutions after leaching, presumably due to the electrostatic repulsion between the glass surface and similarly charged particles. Colloids were not found in Mg, Zn or Ca chloride solutions after leaching; instead, a relatively thick metasilicate surface layer was formed on glass surfaces leached in these solutions. The concentration of Si in solution is reduced by the formation of these surface layers.

Stresses in the Surface Layer and Hydrogen Absorption and Diffusion in Cavitation Condition

2014 ◽  
Vol 225 ◽  
pp. 131-138
Author(s):  
Jarosław Chmiel ◽  
Jolanta Baranowska ◽  
Roman Jędrzejewski ◽  
Arkadiusz Rzeczycki
Keyword(s):  
Surface Layer ◽  
Stress State ◽  
Hydrogen Absorption ◽  
Surface Layers ◽  
Fem Modeling ◽  
And Diffusion

Cavitation attack in liquids generated a various states of stresses in surface layers of metals. Differences in stress state effects on hydrogen absorption activated by the cavitation implosion. Results of XRD investigation and FEM modeling shows on inhomogenity of process.

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