NDLI: The Contribution of a Soft Thin (Metallic) Film to a Friction Pair in the Running-In Process

Content Provider	Springer Nature Link
Author	Liu, Zhiqiang Neville, Anne Reuben, R.L. Shen, Weidian
Copyright Year	2001
Abstract	Analytical and experimental studies have been conducted on silver-film-covered and uncoated metallic surfaces to investigate the role of the soft, thin, metallic film in the running-in process. The experimental results have shown that a low coefficient of friction of about 0.22 and especially low wear can be obtained at the inception of sliding when there is a thin film. The analysis has shown that for the coated case the improvements can be obtained owing to the increase of the true area of contact and thus the reduction of contact pressures. In the presence of such a thin film, it has been pointed out that the friction force arises due to shear of the film and substrate instead of solely shearing of the film. Based on the experimental and analytical results, a new physical model for the film-covered case was proposed where a plastic deformation for the thin film was assumed. To account for the role of the film in preventing the substrate/pairing materials from wear, the effect of the coefficients of friction on the maximum shear stresses and maximum tensile stresses in the subsurface was calculated in light of the von Mises yield criterion $$\sqrt {J_2 }$$ .
Starting Page	161
Ending Page	169
Page Count	9
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	11
Issue Number	3-4
e-ISSN	15732711
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Surfaces and Interfaces, Thin Films Mechanics
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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