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TECHNICAL PAPERS

Time-Dependent Mild to Severe Wear Transition in Oscillating Motion of Cylindrical Sliding Pairs Under Boundary Lubrication

[+] Author and Article Information
Naofumi Hiraoka

Advanced Materials & Devices Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan

J. Tribol 124(4), 822-828 (Sep 24, 2002) (7 pages) doi:10.1115/1.1494088 History: Received January 29, 2002; Revised May 07, 2002; Online September 24, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic of wear test rig and rolling-sliding motion of specimens: (a) schematic of wear test rig; and (b) rolling-sliding motion of specimens.
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Trends of horizontal forces for the loads tested
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Trends of horizontal forces and wear depth of lower specimen for 69 N and 98 N loads: empty symbols; 69 N and filled symbols; 98 N.
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Optical microscope images of wear scars of lower specimens: (a) B; and (b) D in Fig. 3.
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Relations between loads and oscillation numbers of mild to severe wear transition points
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Auger electron energy intensity in wear scars of specimens for 69 N load
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Temperature trend of upper specimen for 69 N load
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Wear shapes of upper and lower specimens of test I (69 N load and 18600 oscillations): (a) lower specimen; and (b) upper specimen.
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Calculation model for wear simulation: (a) the whole of the model; and (b) schematic of the contact area.
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Results of wear simulation for 69 N load: (a) specimen’s shape change; (b) wear depth; (c) contact pressure on the lower specimen; (d) time trends of the contact pressures (Pmax: maximum contact pressure; Pmean: mean contact pressure, for one oscillation, respectively.) The lengths and the contact pressures were normalized by the upper specimen radius and hardness of the upper specimen material. Numbers correspond to the oscillation numbers.
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Contact shapes of upper and lower specimens
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Calculated dimensionless equivalent contact radius with respect to the contact position on the upper specimen in one stroke. Contact points move from right to left. Numbers correspond to the oscillation numbers.
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Results of the simulation for the flat plate and cylindrical pin sliding pair: (a) specimen’s shape change; (b) contact pressure on the lower specimen; and (c) time trends of the contact pressures (symbols correspond to Fig. 10).

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