Features of deterioration and surface layers structure of molybdene and metal materials in mutual dry sliding under electric current

2020 ◽  
pp. 47-51
Author(s):  
M.I. Aleutdinova ◽  
◽  
V.V. Fadin ◽  
Keyword(s):  
Electric Current ◽  
Dry Sliding ◽  
Surface Layers ◽  
Metal Materials

On self-organization of the surface layer of structural steel in dry sliding against quenched steel under electric current

2021 ◽  
pp. 29-37
Author(s):  
M. I. Aleutdinova
Keyword(s):  
Structural Steel ◽  
Electric Current ◽  
Hardened Steel ◽  
Self Organization ◽  
Confocal Laser ◽  
Dry Sliding ◽  
Surface Layers ◽  
X Ray ◽  
Quenched Steel ◽  
Two Sectors

Using optical and confocal laser microscopes it was shown that dry sliding of structural steel against hardened steel under electric current of density higher 250 A/cm2 was accompanied by the formation of composite tribolayers. By X-ray phase analysis of the surface layers of the sample and counterbody was shown that they contain α-Fe, γ-Fe, and FeO. It is noted that the self-organization of the tribosystem under conditions of dry sliding under electric current can be represented as a hierarchy of structural states of the surface layers of contacting materials. It was found that the nominal sample area had two sectors. The character of the contact interaction in the sectors differs from each other.

scholarly journals FATIGUE TESTS OF METAL MATERIALS (review) Part 1. Main definitions, loading parameters, representation of results of tests

2020 ◽  
pp. 59-70
Author(s):  
V.S. Erasov ◽  
◽  
E.I. Oreshko ◽  
Keyword(s):  
Hysteresis Loop ◽  
Distinctive Feature ◽  
Main Crack ◽  
Elastoplastic Deformation ◽  
Cyclic Fatigue ◽  
Fatigue Tests ◽  
Surface Layers ◽  
Near Surface ◽  
Mechanical Hysteresis ◽  
Metal Materials

The article gives the review of techniques of fatigue tests of metal materials and presents the results of such tests . It has been shown that the low-cyclic fatigue occurs in conditions of elastoplastic deformation in material microvolume from the first cycles of loading. Its distinctive feature is influence on durability of the size and form of a mechanical hysteresis loop . Nucleation of fatigue microcracks and formation of the main crack occurs on the surface and in near-surface layers of a sample.

Metallurgical investigations of dry sliding surface layers in phosphorus iron/steel friction pairs

Wear ◽  
2002 ◽  
Vol 252 (3-4) ◽  
pp. 269-275
Author(s):  
Y.Z Zhang ◽  
S.J Wu ◽  
W.M Liu ◽  
Y Chen ◽  
B Shang Guan ◽  
...  
Keyword(s):  
Dry Sliding ◽  
Sliding Surface ◽  
Surface Layers ◽  
Phosphorus Iron
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