Dynamic Processes of Substructural Rearrangement under Friction of Carbon Steel

• Autorzy: Shevelya, Valeriy , Pashechko, Mykhaylo , Kalda, Galyna , Sokolan, Yulia
• Języki publikacji: EN

Abstrakty

EN

The effect of heat treatment (tempering temperature after quenching) of medium carbon steels (steel 45 and steel 50) on tribological indicators at sliding friction without lubrication in connection with the change in strength and rheological elastic properties of steel, controlling the dissipative properties of the frictional contact has been studied. Tribotechnical tests were conducted according to two schemes. A high-temperature tribometer was used for “soft” friction according to the “ball-plane” scheme, which allowed varying the temperature of the friction contact. Influence of load-rate modes was studied in more “hard” conditions on the friction machine under the “finger-disk” scheme. Substructural transformations of steel caused by heat treatment were evaluated by changes in amplitude-dependent internal friction on a torsion pendulum-type machine, which also allowed measuring frictional damping (contact internal friction) in the preliminary displacement mode. The interrelation between hardness, elastic modulus and internal friction of steel and wear resistance, wear capacity, friction coefficient and the level of frictional damping has been established. It is shown that the growth of elastic modulus and increase of steel relaxation resistance after the appropriate heat treatment are conjugated with the development of adhesion and setting, which, as topochemical reactions in the solid phase, are the leading forms of contact stress relaxation under the above conditions. Correlation of tribological indicators of external friction with amplitude-dependent and relaxation (temperature-dependent) internal friction taking into account structural state of steel and friction temperature regime is established. Substructural preconditions, dynamic relaxation mechanisms of hardening and load-temperature friction conditions under which martensitic structures exhibit abnormally high wear resistance and significant growth of frictional damping level are considered. The tribological analogue of the Porteuen - Le Chatelier effect, manifesting in the form of frictional self-oscillations in the range of temperatures of dynamic deformation aging is established. A treatment of the nature of the Kael-Ziebel effect, the temperature-rate and load localization of which in friction is associated with the temperature range of dynamic strain aging with Snook-Kester relaxation superimposed, is proposed.

Słowa kluczowe

EN

quenching; martensite; tempering; dynamic strain aging; relaxation; internal friction; wear resistance

• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2023
• Tom: Vol. 17, no 3
• Strony: 236--248
• Opis fizyczny: Bibliogr. 25 poz., fig., tab.

Twórcy

autor

Shevelya, Valeriy

• Department of Construction and Civil Security, Khmelnitskiy National University, 11, Instytutska street, 29016 Khmelnitskiy, Ukraine

autor

Pashechko, Mykhaylo

• Department of Fundamentals of Technology, Lublin University of Technology, Nadbystzrycka 38, 20-618 Lublin, Poland,

autor

Kalda, Galyna

• Department of Construction and Civil Security, Khmelnitskiy National University, 11, Instytutska street, 29016 Khmelnitskiy, Ukraine

autor

Sokolan, Yulia

• Department of Construction and Civil Security, Khmelnitskiy National University, 11, Instytutska street, 29016 Khmelnitskiy, Ukraine

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).

Identyfikatory

DOI

10.12913/22998624/166341