The effects of nanotexturing on oil film thickness and shape under pointcontact elasto-hydrodynamic lubrication (EHL) conditions were experimentally investigated. A disk-onball friction tester with an optical interferometer was used to measure oil film thickness and to observe the oil film shape. Periodic groove structures with a spiral, perpendicular, or parallel shape and with various groove depths and distances were formed by irradiation of a femtosecond laser onto the surface of steel balls. These nanotextured balls were tested under a load of 20 N and at rotational speeds from 1.0 to 3.0 m/s. Most of the balls with nanotexturing had a thicker oil film than those without texturing. The groove depth and angle were the key parameters determining the thickness of the oil film as they controlled the amount of side leakage of oil from the contact point. Optimization of these parameters resulted in an oil film that was almost twice as thick as that on the ball without texturing.
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July 2014
Research-Article
Effect of Nanotexturing on Increase in Elastohydrodynamic Lubrication Oil Film Thickness
Tomoko Hirayama,
Tomoko Hirayama
Department of Mechanical Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
;PRESTO,
Japan Science and Technology Agency,
4-1-8 Honcho, Kawaguchi,
Saitama 332-0012, Japan
e-mail: thirayam@mail.doshisha.ac.jp
Japan Science and Technology Agency,
4-1-8 Honcho, Kawaguchi,
Saitama 332-0012, Japan
e-mail: thirayam@mail.doshisha.ac.jp
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Mitsutaka Ikeda,
Mitsutaka Ikeda
Graduate School of Science and Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
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Toshiteru Suzuki,
Toshiteru Suzuki
Graduate School of Science and Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
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Takashi Matsuoka,
Takashi Matsuoka
Department of Mechanical Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
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Hiroshi Sawada,
Shiga 525-8511,
Hiroshi Sawada
Canon Machinery Inc.
,85 Minamiyamada-cho, Kusatsu
,Shiga 525-8511,
Japan
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Kosuke Kawahara
Shiga 525-8511,
Kosuke Kawahara
Canon Machinery Inc.
,85 Minamiyamada-cho, Kusatsu
,Shiga 525-8511,
Japan
Search for other works by this author on:
Tomoko Hirayama
Department of Mechanical Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
;PRESTO,
Japan Science and Technology Agency,
4-1-8 Honcho, Kawaguchi,
Saitama 332-0012, Japan
e-mail: thirayam@mail.doshisha.ac.jp
Japan Science and Technology Agency,
4-1-8 Honcho, Kawaguchi,
Saitama 332-0012, Japan
e-mail: thirayam@mail.doshisha.ac.jp
Mitsutaka Ikeda
Graduate School of Science and Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
Toshiteru Suzuki
Graduate School of Science and Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
Takashi Matsuoka
Department of Mechanical Engineering,
Kyoto 610-0394,
Doshisha University
,1-3 Miyakodani, Tatara, Kyotanabe
,Kyoto 610-0394,
Japan
Hiroshi Sawada
Canon Machinery Inc.
,85 Minamiyamada-cho, Kusatsu
,Shiga 525-8511,
Japan
Kosuke Kawahara
Canon Machinery Inc.
,85 Minamiyamada-cho, Kusatsu
,Shiga 525-8511,
Japan
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received September 18, 2013; final manuscript received February 25, 2014; published online April 25, 2014. Assoc. Editor: Xiaolan Ai.
J. Tribol. Jul 2014, 136(3): 031501 (8 pages)
Published Online: April 25, 2014
Article history
Received:
September 18, 2013
Revision Received:
February 25, 2014
Accepted:
March 15, 2014
Citation
Hirayama, T., Ikeda, M., Suzuki, T., Matsuoka, T., Sawada, H., and Kawahara, K. (April 25, 2014). "Effect of Nanotexturing on Increase in Elastohydrodynamic Lubrication Oil Film Thickness." ASME. J. Tribol. July 2014; 136(3): 031501. https://doi.org/10.1115/1.4027286
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