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Besides, the movement kinematics is determined by a number of external factors, such as: type of the movement, the load friction, the shape of the cooperating surfaces, the surface roughness, the type of lubricant, and finally the type of material association.
The grinding of metallic specimens was performed with papers Nos. 200 to 2400, and final polishing was made with the diamond suspension of 3 and 1 µm grain size.
Comparison of the circumferential groove depth for experimental samples Friction pair Number of sample Material Circumferential groove depth d [µm] Average circumferential groove depth dav[µm] Ti6Al4V/UHMW-PE 1 Ti6Al4V -22.56 - 2 8.82 13.42 3 18.02 1 UHMW-PE 14.14 22.25 2 35.26 3 17.34 Ti13Nb13Zr/UHMW-PE 1 Ti13Nb13Zr -12.40 - 2 0.34 7.43 3 14.51 1 UHMW-PE 21.53 26.38 2 28.71 3 28.91 The negative values obsrved for both alloys are an evidence of deepening of circumferential grooves as a result of migration of wear products into the grooves and their further degradation.

The number of SILAR cycles is 100.
The preferential orientation of the β-CuSCN grains is observed along the (003) axis aligning with the growth direction.
The presence of a number of peaks in XRD pattern is the indication of polycrystalline nature of the CuSCN.

The main welding methods are given in [1], as well as in the documents developed on its basis [2] and a number of other documents operating in different countries.
The presence of oxygen in the steels along with the oxidation of iron causes a direct oxidation of a number of alloying elements.
In the zone of thermal influence there is a zone of superheating with a vidmanstett structure and a zone of normalization with a characteristic fine-grained ferrite-pearlite structure.

Number of indents was minimal 6.
Factorial regression analysis was used for determination of the variables effect on responses (Standard regression shouldn be used because for regression analysis is necessary evaluate a higher number of alloys).
With higher boron content, the continuous netlike structure along grains of eutectic high Fe2B has formed.

Some works have been done to study single crystal and polycrystalline in micrometer grain size range of Tb-YIG [9, 10].
The results were compared with the Joint Committee on Powder Diffraction Standard (JCPDS-ICDD; number 43-507) for pure YIG.
The Fe2O3 and YFeO3 peaks were confirmed by JCPDS number 39-1346 and 39-1489 confirm that they are Fe2O3 and YFeO3, respectively.

The most vulnerable region is normally the course grain HAZ region adjacent to the fusion boundary, which sometimes fails by cleavage fracture at the low design temperatures typical of northern pipelines.
Although great strides have been made in fracture control, a number of improvements are still required.
A number of candidates have been suggested, among them the Tstress, Q-parameter, and A2.

The results show that carbon doping can be introduced effectively to replace part B atoms of MgB2 lattice to form a new flux pinning centers, and doping nano-SiC can further refine the grain of MgB2 and introduce nano-impurities.
From the area of the diffraction peak, both in the samples, MgB2 phase have appeared in large numbers.
This indicates that an effective carbon-doped was formed in the sample of sugar-doped high temperature sintering, the number of C went into the lattice of MgB2 and replaced part B, led to the lattice parameters of MgB2 was reduced, the peak position shifted to a high angle.

However, in a number of papers [11–13, 20] reports about significant acceleration of the process with the use of ultra-fine milling, acceptable for various materials.
After re-milling, the material was washed, dried, and then the effect of grain size on the rate of POX leaching was investigated.
Acknowledgements Research have been performed at Russian Science Foundation (RSCF) sposnorship (Project number: № 18-19-00186).

The results showed in Table4: Table 4: The results of hydration heat test ID Peak numbers Time to peak The highest heat release rate（J/gH） The heat amount（J/g） 24h 48h 72h 1 1 13 9.7 172 234 259 2 2 15/35 4.66 81 164 196 3 2 14/34 4.70 87 175 210 4 2 12/28 5.07 90 158 185 5 2 13/25 4.77 99 155 181 6 2 12/25 4.33 86 141 167 7 2 10/24 4.41 83 135 151 8 2 9/27 3.8 75 128 155 9 2 12/30 2.71 58 108 133 10 2 15/32 2.33 42 90 113 From Table 4.
Table 5: The results of shrinkage rate(%) number 1 2 3 4 5 6 7 8 9 10 1 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.01 0.02 3 0.05 0.03 0.03 0.02 0.03 0.03 0.02 0.02 0.03 0.02 7 0.06 0.04 0.04 0.03 0.04 0.04 0.02 0.03 0.03 0.02 14 0.07 0.06 0.06 0.03 0.05 0.05 0.03 0.05 0.05 0.03 28 0.08 0.06 0.06 0.04 0.06 0.06 0.04 0.05 0.05 0.03 56 0.08 0.06 0.06 0.05 0.06 0.06 0.04 0.05 0.05 0.04 90 0.09 0.07 0.07 0.05 0.07 0.07 0.05 0.06 0.06 0.04 180 0.11 0.09 0.08 0.07 0.09 0.07 0.06 0.08 0.07 0.06 From Table 5, it can get that the biggest rate of the 180th self-construction is 0.11% of ID1.
The Grain Size of Mineral Admixtures Impacts on Mechanical Properties of Cement Paste and High-Performance Concrete Material.

The formation of nitride is advantageous for the performance of HVAS surface due to a large number of nitrogen forming elements in the presence of HVAS, but it is rarely reported in the field of nitriding of HVAS.
The presences of a large number of carbide-forming elements, such as chromium, molybdenum, vanadium, lead to the formation of hard carbide in the martensite [1].
It can be seen that the MC carbides have different morphologies, such as rod and globular morphology, which is distributed in the center of grains.