Structure and mechanical properties of tribologically induced nanolayers

Ultra low wear rates are common for lubricated state-of-the-art mechanical devices used in machines and cars. The main paths of energy dissipation are heat and wear generation as well as a significant change of near-surface material within the range of a few hundred nanometers. Due to mechanical int...

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Published in:Wear 2006-02, Vol.260 (4), p.433-437
Main Authors: Shakhvorostov, D., Pöhlmann, K., Scherge, M.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Friction, wear, lubrication
Machine components
Mechanical engineering. Machine design
Nanomechanics
Wear mechanisms
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description Ultra low wear rates are common for lubricated state-of-the-art mechanical devices used in machines and cars. The main paths of energy dissipation are heat and wear generation as well as a significant change of near-surface material within the range of a few hundred nanometers. Due to mechanical intermixing at the asperity level the involved materials change with respect to chemical composition, morphology and mechanical properties. By means of focused ion beam analysis the morphology of the near-surface material of tribologically stressed and unstressed samples was investigated. In addition, nanoindentation was applied to characterize the mechanical properties. In the presented study mechanical intermixing leads to nanocrystalline material which is softer than bulk material. Depending on the level of tribological stressing, the modified material exhibits smaller energy dissipation, thus lower friction and wear.
doi_str_mv 10.1016/j.wear.2005.02.086
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subjects Applied sciences
Exact sciences and technology
Friction, wear, lubrication
Machine components
Mechanical engineering. Machine design
Nanomechanics
Wear mechanisms
title Structure and mechanical properties of tribologically induced nanolayers
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