The Surface Layer States in Metallic Materials Subjected to Dry Sliding and Electric Current


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Resumo

The structure and properties of surface layers of metallic materials undergoing structural-phase changes as a result of their contact interactions in the form of dry sliding friction on steel in combination with exposure to electric currents are investigated. This impact results in the formation of a composite surface layer whose structural constituents are the particles of FeO oxide, FCC- and BCC-iron, and quasi-amorphous initial material. Sliding of materials at the contact current density higher than 150 A/cm2 gives rise to the formation of local, low-stability structures which, as a result of phase transformations, are observed as sectors of quasiliquid plastic flow on the sliding surface. It is shown that the average temperatures of the Cu – steel material contact do not exceed 300°С, i.e., none of the surface-layer constituents reaches its melting temperature. It is shown that quasi-liquid plastic flow favors stress relaxation and maintains the strength of the surface layer, which ensures its lower wear.

Sobre autores

V. Fadin

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: fvv@ispms.ru
Rússia, Tomsk

M. Aleutdinova

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences; Seversk Technological Institute at The National Research Nuclear University MEPHI

Email: fvv@ispms.ru
Rússia, Tomsk; Seversk

A. Potekaev

National Research Tomsk State University; V. D. Kuznetsov Siberian Physical-Technical Institute at the National Research Tomsk State University

Email: fvv@ispms.ru
Rússia, Tomsk; Tomsk

O. Kulikova

National Research Tomsk Polytechnic University

Email: fvv@ispms.ru
Rússia, Tomsk

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